Fundamental movement skills (FMS), physical fitness (PF) and body fat percentage (BF%) are significantly related to socio-economic status (SES). However, it remains unclear why previous studies have had different findings regarding the direction of the association between SES and FMS, PF and BF%. A suggested explanation is that the direction of the link can be influenced by cultural experiences and traditions. Therefore, the aim of the current study was to investigate links between SES and FMS, PF, BF% of Grade One learners from two different ethno-geographic areas in Cape Town, South Africa. Grade One children (n = 191) (n = 106 boys and n = 85 girls; age (6.7 ± 0.33)) from different socio-economic areas in Cape Town, South Africa, were selected to participate in the study. South African schools are classified into five different quintiles (1 = poorest and 5 = least poor public schools). For this study, two schools were selected, one from quintile 2 and the other from quintile 5. BF% was assessed according to Slaughter's equation. FMS were measured using the Gross Motor Development Test-2 (TGMD-2) and PF via five tests: 1. dynamic strength of lower limb (broad jump); 2. dynamic strength of upper limb and trunk (throwing a tennis ball); 3. speed agility (4 × 10 m shuttle running); 4. cardiorespiratory fitness (20 m shuttle run endurance test (Leger test)) and 5. flexibility (sit and reach test). An analysis of covariance (ANCOVA) found that BF% and WHtR were significantly greater in children with higher SES (Z = 6.04 p < 0.001; Hedg = 0.54), (Z = 3.89 p < 0.001; Hedg = 0.32). Children with lower SES achieved significantly better TGMD-2 standard scores in the locomotor subtest, compared to their peers with higher SES. In the object control subtest, no significant SES-related difference was found. However, ANCOVA showed that girls performed better in FMS than boys. In PF, the main effect of SES was observed in dynamic strength of trunk and upper limb (throwing) and flexibility, where children with lower SES performed significantly better. No significant difference was found in cardiorespiratory performance (CRP) (Beep test), even though children with lower SES achieved better results. Results from the current study suggest that links between SES, PF, FMS and body fat percentage in children seem to be dependent on cultural and traditional experiences. These experiences should therefore be included as an important factor for the development of programmes and interventions to enhance children's lifelong motor behaviour and health strategies.

Faculty of Medicine and Health Sciences Stellenbosch University Private Bag X1 Matieland 7602 South Africa

Faculty of Physical Education and Sport Charles University José Martího 31 Praha 6 162 52 Veleslavín Czech Republic

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Robinson L.E., Stodden D.F., Barnett L.M., Lopes V.P., Logan S.W., Rodrigues L.P., D’Hondt E. Motor competence and its Effect on Positive Development Trajectories of Health. Sports Med. 2015;45:1273–1284. doi: 10.1007/s40279-015-0351-6. PubMed DOI

Cattuzzo M.T., Henrique R., Re A.H.N., De Oliveira I.S., Melo B.M., De Sousa Moura M., De Araujo R.C., Stodden D. Motor competence and health related physical fitness in youth: A systematic review. J. Sci. Med. Sport. 2016;19:123–129. doi: 10.1016/j.jsams.2014.12.004. PubMed DOI

Lubans D.R., Morgan P.J., Cliff D.P., Barnett L.M., Okely A.D. Fundamental Movement Skills in Children and Adolescents. Sports Med. 2010;40:1019–1035. doi: 10.2165/11536850-000000000-00000. PubMed DOI

Vameghi R., Shams A., Dehkordi P.S. The effect of age, sex and obesity on fundamental motor skills among 4 to 6 years-old children. Pak. J. Med. Sci. 2013;29:586–589. doi: 10.12669/pjms.292.3069. PubMed DOI PMC

Pienaar A.E., Van Reenen I., Weber A.M. Sex differences in fundamental movement skills of a selected group of 6-year-old South African children. Early Child Dev. Care. 2016;186:1994–2008. doi: 10.1080/03004430.2016.1146263. DOI

Niederer I., Kriemler S., Zahner L., Bürgi F., Ebenegger V., Marques-Vidal P., Puder J.J. BMI Group-Related Differences in Physical Fitness and Physical Activity in Preschool-Age Children. Res. Q. Exerc. Sport. 2012;83:12–19. doi: 10.1080/02701367.2012.10599820. PubMed DOI

Abdelkarim O., Ammar A., Trabelsi K., Cthourou H., Jekauc D., Irandoust K., Hoekelmann A. Prevalence of underweight and overweight and its association with physical fitness in Egyptian schoolchildren. Int. J. Environ. Res. Public Health. 2020;17:75. doi: 10.3390/ijerph17010075. PubMed DOI PMC

Musalek M., Kokstejn J., Papez P., Scheffler C., Mumm R., Czernitzki A., Koziel S. Impact of normal weight obesity on fundamental motor skills in pre-school children aged 3 to 6 years. J. Biol. Clin. Anthropol. 2017;74:203–212. doi: 10.1127/anthranz/2017/0752. PubMed DOI

Ogden C.L., Carroll M.D., Curtin L.R., Lamb M.M., Flegal K.M. Prevalance of High Body Mass Index in US children and Adolescents, 2007–2008. J. Am. Med. Assoc. 2010;303:242–249. doi: 10.1001/jama.2009.2012. PubMed DOI

Stodden D.F., Goodway J.D., Langendorfer S.J., Roberton M., Rudisill M.E., Garcia C., Garcia L.E.A. Developmental Perspective on the Role of Motor Skill Competence in Physical Activity: An Emergent Relationship. J. Mot. Competence Phys. Act. 2008;60:290–306. doi: 10.1080/00336297.2008.10483582. DOI

Choukem S., Kamdeu-Chedeu J., Leary S.D., Mboue-Djieka Y., Nebongo D.N., Akazong C., Mapoure Y.N., Hamilton-Shield J.P., Gautier J., Mbanya J.C. Overweight and obesity in children aged 3–13 years in urban Cameroon: A cros-sectional study of prevalence and association with socio-economic status. BMC Obes. 2017;4:1–8. doi: 10.1186/s40608-017-0146-4. PubMed DOI PMC

Rao D.P., Kropac E., Do M.T., Roberts K.C., Jayaraman G.C. Childhood overweight and obesity trends in Canada. Health Promot. Chronic Dis. Prev. Can. Res. Policy Pract. 2016;36:194. doi: 10.24095/hpcdp.36.9.03. PubMed DOI PMC

Hardy L., Mihrshahi S., Gale J., Drayton B.A., Bauman A., Mitchell J. 30-year trends in overweight, obesity and waist-to-height ratio by socioeconomic status in Australian children, 1985 to 2015. Int. J. Obes. 2017;41:76–82. doi: 10.1038/ijo.2016.204. PubMed DOI PMC

Matsudo V.K.R., Ferrari G.L.D.M., Araújo T.L., Oliveira L.C., Mire E., Barreira T.V., Katzmarzyk P. Socioeconomic status indicators, physical activity, and overweight/obesity in Brazilian children. Rev. Paul. De Pediatr. 2016;34:162–170. doi: 10.1016/j.rpped.2015.04.003. PubMed DOI PMC

Lee H.J., Kim S.H., Choi S.H., Lee J.S. The association between socioeconomic status and obesity in Korean children: An analysis of the Fifth Korea National Health and Nutrition Examination Survey (2010–2012) Pediatric Gastroenterol. Hepatol. Nutr. 2017;20:186–193. doi: 10.5223/pghn.2017.20.3.186. PubMed DOI PMC

Herrera J.C., Lira M., Kain J. Socioeconomic vulnerability and obesity in Chilean schoolchildren attending first grade: Comparison between 2009 and 2013. Rev. Chil. Pediatr. 2017;88:736–743. doi: 10.4067/S0370-41062017000600736. PubMed DOI

Al-Hussaini A., Bashir M.S., Khormi M., AlTuraiki M., Alkhamis W., Alrajhi M., Halal T. Overweight and obesity among Saudi children and adolescents: Where do we stand today? Saudi J. Gastroenterol. 2019;25:229–235. doi: 10.4103/sjg.SJG_617_18. PubMed DOI PMC

Griffiths P.L., Rousham E.K., A Norris S., Pettifor J.M., Cameron N. Socio-economic status and body composition outcomes in urban South African children. Arch. Dis. Child. 2008;93:862–867. doi: 10.1136/adc.2006.112649. PubMed DOI

Ljungvall Å. The Freer the Fatter? A Panel Study of the Relationship between Body-Mass Index and Economic Freedom. Lund University; Lund, Switzerland: 2013.

Costa-Font J., Mas N. Globesity? The effects of globalization on obesity and caloric intake. Food Policy. 2016;64:121–132. doi: 10.1016/j.foodpol.2016.10.001. DOI

Bobbio T.G., Morcillo A.M., Filho A.D.B., Goncalves V.M.G. Factors Associated with Inadequate Fine Motor Skills in Brazilian Students of Different Socioeconomic Status. Percept. Mot. Skills. 2007;105:1187–1195. doi: 10.2466/pms.105.4.1187-1195. PubMed DOI

Handal J.A., Lozoff B., Breilh J., Harlow D.S. Effect of community of residence on neurobehavioral development in infants and young children in a flower-growing region of Ecuador. Environ. Health Perspect. 2007;115:128–133. doi: 10.1289/ehp.9261. PubMed DOI PMC

Grantham-McGregor S.M., Fernald L.C., Kagawa R.M.C., Walker S. Effects of integrated child development and nutrition interventions on child development and nutritional status. Ann. N. Y. Acad. Sci. 2014;1308:11–32. doi: 10.1111/nyas.12284. PubMed DOI

Hardy L., King L., Farrell L., Macniven R., Howlett S. Fundamental movement skills among Australian preschool children. J. Sci. Med. Sport. 2010;13:503–508. doi: 10.1016/j.jsams.2009.05.010. PubMed DOI

Pienaar A.E., Visagie M., Leonard A. Proficiency at Object Control Skills by Nine- to Ten-Year-Old Children in South Africa: The NW-Child Study. Percept. Mot. Ski. 2015;121:309–332. doi: 10.2466/10.PMS.121c15x8. PubMed DOI

Mülazimoglu-Ballo Ö. Motor Proficiency and Body Mass Index of Preschool Children: In Relation to Socioeconomic Status. J. Educ. Train. Stud. 2017;4:237–243.

Aalizadeh B., Mohamadzadeh H., Hosseini F.S. Fundamental movement skills among Iranian primary school children. J. Fam. Reprod. Health. 2014;8:155–159. PubMed PMC

Venter A., Pienaar A.E., Coetzee D. Extent and nature of motor difficulties based on age, ethnicity, gender and socio-economic status in a selected group of three-to five-year-old children. S. Afr. J. Res. Sport Phys. Educ. Recreat. 2015;37:169–183.

Armstrong M.E.G., Lambert E.V., Lambert M.I. Physical fitness of South African primary school children, 6 to 13 years of age: Discovery vitality health of the Nation study. Percept. Mot. Skills. 2011;113:999–1016. doi: 10.2466/06.10.13.PMS.113.6.999-1016. PubMed DOI

Eather N., Bull A., Young M.D., Barnes A.T., Pollock E.R., Morgan P.J. Fundamental movement skills: Where do girls fall short? A novel investigation of object-control skill execution in primary-school aged girls. Prev. Med. Rep. 2018;11:191–195. doi: 10.1016/j.pmedr.2018.06.005. PubMed DOI PMC

Navarro-Patón RLago-Ballesteros J., Arufe-Giráldez V., Sanmiguel-Rodríguez A., Lago-Fuentes C., Mecías-Calvo M. Gender differences on motor competence in 5-year-old preschool children regarding relative age. Int. J. Environ. Res. Public Health. 2021;18:3143. doi: 10.3390/ijerph18063143. PubMed DOI PMC

Morley D., Till K., Ogilvie P., Turner G. Influences of gender and socioeconomic status on the motor proficiency of children in the UK. Hum. Mov. Sci. 2015;44:150–156. doi: 10.1016/j.humov.2015.08.022. PubMed DOI

Cliff D.P., Okely A.D., Smith L.M., McKeen K. Relationships between fundamental movement skills and objectively measured physical activity in preschool children. Pediatric Exerc. Sci. 2009;21:436–449. doi: 10.1123/pes.21.4.436. PubMed DOI

Hardy L.L., Reinten-Reynolds T., Espinel P., Zask A., Okely A.D. Prevalence and correlates of low fundamental movement skill competency in children. Pediatrics. 2012;130:e390–e398. doi: 10.1542/peds.2012-0345. PubMed DOI

Latorre Román P.Á., Moreno del Castillo R., Lucena Zurita M., Salas Sánchez J., García-Pinillos F., Mora López D. Physical fitness in preschool children: Association with sex, age and weight status. Child Care Health Dev. 2017;43:267–273. doi: 10.1111/cch.12404. PubMed DOI

Dencker M., Thorsson O., Karlsson M.K., Lindén C., Eiberg S., Wollmer P., Andersen L.B. Gender differences and determinants of aerobic fitness in children aged 8–11 years. Eur. J. Appl. Physiol. 2007;99:19–26. doi: 10.1007/s00421-006-0310-x. PubMed DOI

Amusa L.O., Goon D.T., Amey A.K. Gender differences in neuromotor fitness of rural South African children. Med. Sport. 2010;6:221–237.

Van Capelle A., Broderick C.R., van Doorn N., Ward R.E., Parmenter B.J. Interventions to improve fundamental motor skills in pre-school aged children: A systematic review and meta-analysis. J. Sci. Med. Sport. 2017;20:658–666. doi: 10.1016/j.jsams.2016.11.008. PubMed DOI

Peralta L.R., Mihrshahi S., Bellew B., Reece L.J., Hardy L.L. Influence of School-Level Socioeconomic Status on Children’s Physical Activity, Fitness, and Fundamental Movement Skill Levels. J. Sch. Health. 2019;89:460–467. doi: 10.1111/josh.12761. PubMed DOI

de Greeff J.W., Bosker R.J., Oosterlaan J., Visscher C., Hartman E. Effects of physical activity on executive functions, attention and academic performance in preadolescent children: A meta-analysis. J. Sci. Med. Sport. 2018;21:501–507. doi: 10.1016/j.jsams.2017.09.595. PubMed DOI

Prista A., Marques A., Maia J. Relationship between physical activity, socioeconomic status, and physical fitness of 8–15-year-old youth from Mozambique. Am. J. Hum. Biol. 1997;9:449–457. doi: 10.1002/(SICI)1520-6300(1997)9:4<449::AID-AJHB4>3.0.CO;2-R. PubMed DOI

Freitas D., Maia J.M., Beunen G., Claessens A., Thomis M., Marques A., Crespo M., Lefevre J. Socio-economic status, growth, physical activity and fitness: The Madeira Growth Study. Ann. Hum. Biol. 2007;34:107–122. doi: 10.1080/03014460601080983. PubMed DOI

Hall C.J., Eyre E.L., Oxford S.W., Duncan M.J. Relationships between motor competence, physical activity, and obesity in British preschool aged children. J. Funct. Morphol. Kinesiol. 2018;3:57. doi: 10.3390/jfmk3040057. PubMed DOI PMC

Donnelly J.E., Greene J.L., Gibson C.A., Smith B.K., Washburn R.A., Sullivan D.K., Williams S.L. Physical Activity Across the Curriculum (PAAC): A randomized controlled trial to promote physical activity and diminish overweight and obesity in elementary school children. Prev. Med. 2009;49:336–341. doi: 10.1016/j.ypmed.2009.07.022. PubMed DOI PMC

Keller B.A. State of the art reviews: Development of fitness in children: The influence of gender and physical activity. Am. J. Lifestyle Med. 2008;2:58–74. doi: 10.1177/1559827607308802. DOI

D’Haese S., Van Dyck D., De Bourdeaudhuij I., Deforche B., Cardon G. The association between objective walkability, neighborhood socio-economic status, and physical activity in Belgian children. Int. J. Behav. Nutr. Phys. Act. 2014;11:1–8. doi: 10.1186/s12966-014-0104-1. PubMed DOI PMC

National Norms And Standards For School Funding. [(accessed on 19 December 2021)]; Available online: https://www.education.gov.za/Portals/0/Documents/Legislation/Call%20for%20Comments/NATIONAL%20NORMS%20AND%20STANDARDS%20FOR%20SCHOOL%20FUNDING.pdf?ver=2008–03–05–104405–000.

Eston R., Reilly T. Physiology. Volume 2 Routledge; Milton Park, UK: 2013. Kinanthropometry and Exercise Physiology Laboratory Manual: Tests, Procedures and Data.

Slaughter M.H., Lohman T.G., A Boileau R., A Horswill C., Stillman R.J., Van Loan M.D., A Bemben D. Skinfold equations for estimation of body fatness in children and youth. J. Hum. Biol. 1988;60:709–723. PubMed

Reilly J.J. Assessment of body fat percentage in infants and children. Nutrition. 1988;14:821–825. doi: 10.1016/S0899-9007(98)00093-8. PubMed DOI

Kriemler S., Puder J., Zahner L., Roth R., Meyer U., Bedogni G. Estimation of percentage body fat in 6- to 13-year-old children by skinfold thickness, body mass index and waist circumference. Br. J. Nutr. 2010;104:1565–1572. doi: 10.1017/S0007114510002357. PubMed DOI

Morrison K.M., Bugge A., El-Naaman B., Eisenmann J.C., Froberg K., Pfeiffer K.A., Andersen L.B. Inter-Relationships Among Physical Activity, Body Fat, and Motor Performance in 6- to 8-Year-Old Danish Children. Pediatr. Exerc. Sci. 2012;24:199–209. doi: 10.1123/pes.24.2.199. PubMed DOI

Hassapidou M., Daskalou E., Tsofliou F., Tziomalos K., Paschaleri A., Pagkalos I., Tzotzas T. Prevalence of overweight and obesity in preschool children in Thessaloniki, Greece. Hormones. 2015;14:615–622. doi: 10.14310/horm.2002.1601. PubMed DOI

Teo K.K., Rafiq T., Anand S.S., Schulze K.M., Yusuf S., McDonald S.D., Wahi G., Abdalla N., Desai D., Atkinson S.A., et al. Associations of cardiometabolic outcomes with indices of obesity in children aged 5 years and younger. PLoS ONE. 2019;14:e0218816. doi: 10.1371/journal.pone.0218816. PubMed DOI PMC

Santos S., Severo M., Lopes C., Oliveira A. Anthropometric Indices Based on Waist Circumference as Measures of Adiposity in Children. Obesity. 2018;26:810–813. doi: 10.1002/oby.22170. PubMed DOI

Nambiar S., Hughes I., Davies P.S. Developing waist-to-height ratio cut-offs to define overweight and obesity in children and adolescents. Public Health Nutr. 2010;13:1566–1574. doi: 10.1017/S1368980009993053. PubMed DOI

World Health Organization (WHO) The use and interpretation of anthropometry. WHO Tech. Rep. Ser. 1995;854:1–452. PubMed

Ulrich D.A. Test of Gross Motor Development. 2nd ed. Pro-Ed; Austin, TX, USA: 2000.

Foweather L., Knowles Z., Ridgers N., O’Dwyer M.V., Foulkes J.D., Stratton G. Fundamental movement skills in relation to weekday and weekend physical activity in preschool children. J. Sci. Med. Sport. 2015;18:691–696. doi: 10.1016/j.jsams.2014.09.014. PubMed DOI

Brien W.O., Belton S., Issartel J. Fundamental movement skill proficiency amongst adolescent youth. Phys. Educ. Sport Pedagog. 2016;21:557–571. doi: 10.1080/17408989.2015.1017451. DOI

Bolger L.E., Bolger L.A., O’Neill C., Coughlan E. Age and Sex Differences in Fundamental Movement Skills Among a Cohort of Irish School Children. J. Mot. Learn. Dev. 2018;6:81–100. doi: 10.1123/jmld.2017-0003. DOI

Mukherjee S., Jamie L.C.T., Fong L.H. Fundamental Motor Skill Proficiency of 6- to 9-Year-Old Singaporean Children. Percept. Mot. Ski. 2017;124:584–600. doi: 10.1177/0031512517703005. PubMed DOI

De Meester A., Stodden D., Goodway J., True L., Brian A., Ferkel R., Haerens L. Identifying a motor proficiency barrier for meeting physical activity guidelines in children. J. Sci. Med. Sport. 2018;21:58–62. doi: 10.1016/j.jsams.2017.05.007. PubMed DOI

Duncan M.J., Roscoe C.M., Noon M., Clark C., O’Brien W., Eyre E. Run, jump, throw and catch: How proficient are children attending English schools at the fundamental motor skills identified as key within the school curriculum? Eur. Phys. Educ. Rev. 2020;26:814–826. doi: 10.1177/1356336X19888953. DOI

Pienaar A. Kinderkinetics: An investment in the total well-being of children. S. Afr. J. Res. Sport Phys. Educ. Recreat. 2009;31:49–67. doi: 10.4314/sajrs.v31i1.43792. DOI

Parızková J., Sedlak P., Dvorakova H., Lisá L., Bláha P. Secular trends of adiposity and motor abilities in preschool children. Obes. Weight. Loss Ther. 2012;2:153. doi: 10.4172/2165-7904.1000153. DOI

Ortega F.B., Cadenas-Sánchez C., Sanchez-Delgado G., Mora-Gonzalez J., Tellez B.M., Artero E.G., Castro-Piñero J., Labayen I., Chillón P., Löf M., et al. Systematic Review and Proposal of a Field-Based Physical Fitness-Test Battery in Preschool Children: The PREFIT Battery. Sports Med. 2015;45:533–555. doi: 10.1007/s40279-014-0281-8. PubMed DOI

Cadenas-Sanchez C., Martinez-Tellez B., Sanchez-Delgado G., Mora-Gonzalez J., Castro-Piñero J., Löf M., Ruiz J.R., Ortega F.B. Assessing physical fitness in preschool children: Feasibility, reliability and practical recommendations for the PREFIT battery. J. Sci. Med. Sport. 2016;19:910–915. doi: 10.1016/j.jsams.2016.02.003. PubMed DOI

Hair J.F., Black W.C., Babin B.J., Anderson R.E. Multivariate Data Analysis: Pearson New International Edition. Pearson Education Limited; London, UK: 2014.

Cohen J. Statistical Power Analysis for the Behavioral Sciences. 2nd ed. Lawrence Erlbaum; Mahwah, NJ, USA: 1988.

Grissom R.J., Kim J.J. Effect Sizes for Research: Univariate and Multivariate Applications. Routledge; Milton Park, UK: 2012.

Hintze J. NCSS 2007. NCSS LLC; Kaysville, UT, USA: 2007. [(accessed on 16 September 2021)]. Available online: www.ncss.com.

Shen A., Bernabé E., Sabbah W. Severe dental caries is associated with incidence of thinness and overweight among preschool Chinese children. Acta Odontol. Scand. 2019;78:203–209. doi: 10.1080/00016357.2019.1679390. PubMed DOI

Cecil J., Watt P., Murrie I.S.L., Wrieden W., Wallis D., Hetherington M., Bolton-Smith C., Palmer C. Childhood obesity and socioeconomic status: A novel role for height growth limitation. Int. J. Obes. 2005;29:1199–1203. doi: 10.1038/sj.ijo.0803055. PubMed DOI

Bann D., Johnson W., Li L., Kuh D., Hardy R. Socioeconomic inequalities in childhood and adolescent body-mass index, weight, and height from 1953 to 2015: An analysis of four longitudinal, observational, British birth cohort studies. Lancet Public Health. 2018;3:e194–e203. doi: 10.1016/S2468-2667(18)30045-8. PubMed DOI PMC

Badran M., Laher I. Obesity in Arabic-Speaking Countries. J. Obes. 2011;2011:1–9. doi: 10.1155/2011/686430. PubMed DOI PMC

Addo I.Y., Brener L., Asante A.D., de Wit J. Socio-cultural beliefs about an ideal body size and implications for risk of excess weight gain after immigration: A study of Australian residents of sub-Saharan African ancestry. Ethn. Health. 2019;26:1209–1224. doi: 10.1080/13557858.2019.1607261. PubMed DOI

Choukem S.-P., Tochie J.N., Sibetcheu A.T., Nansseu J.R., Hamilton-Shield J.P. Overweight/obesity and associated cardiovascular risk factors in sub-Saharan African children and adolescents: A scoping review. Int. J. Pediatr. Endocrinol. 2020;2020:6. doi: 10.1186/s13633-020-0076-7. PubMed DOI PMC

Viner R.M., Haines M.M., Taylor S., Head J., Booy R., Stansfeld S. Body mass, weight control behaviours, weight perception and emotional well being in a multiethnic sample of early adolescents. Int. J. Obes. 2006;30:1514–1521. doi: 10.1038/sj.ijo.0803352. PubMed DOI

Kruger H.S., Puoane T., Senekal M., Van Der Merwe M.-T. Obesity in South Africa: Challenges for government and health professionals. Public Health Nutr. 2005;8:491–500. doi: 10.1079/PHN2005785. PubMed DOI

Puoane T., Fourie J.M., Shapiro M., Rosling L., Tshaka N.C., Oelefse A. ‘Big is beautiful’-an exploration with urban black community health workers in a South African township. S. Afr. J. Clin. Nutr. 2005;18:6–15. doi: 10.1080/16070658.2005.11734033. DOI

Bosire E.N., Cohen E., Erzse A., Goldstein S.J., Hofman K.J., Norris S.A. ‘I’d say I’m fat, I’m not obese’: Obesity normalisation in urban-poor South Africa. Public Health Nutr. 2020;23:1515–1526. doi: 10.1017/S1368980019004440. PubMed DOI PMC

Marsh H.W., Hau K.T., Sung R.Y.T., Yu C.W. Childhood obesity, gender, actual-ideal body image discrepancies, and physical self-concept in Hong Kong children: Cultural differences in the value of moderation. Dev. Psychol. 2007;43:647–662. doi: 10.1037/0012-1649.43.3.647. PubMed DOI

Jones A. Race, Socioeconomic Status, and Health during Childhood: A Longitudinal Examination of Racial/Ethnic Differences in Parental Socioeconomic Timing and Child Obesity Risk. Int. J. Environ. Res. Public Health. 2018;15:728. doi: 10.3390/ijerph15040728. PubMed DOI PMC

Adkins M.M., Bice M.R., Dinkel D., Rech J.P. Leveling the Playing Field: Assessment of Gross Motor Skills in Low Socioeconomic Children to their Higher Socioeconomic Counterparts. Int. J. Kinesiol. Sports Sci. 2017;5:28–34. doi: 10.7575/aiac.ijkss.v.5n.3p.28. DOI

Fu Y., Burns R.D. Effect of an Active Video Gaming Classroom Curriculum on Helath-Related Fitness, School Day Step Counts, and Motivation in Sixth Graders. J. Phys. Act. Health. 2018;15:644–650. doi: 10.1123/jpah.2017-0481. PubMed DOI

Tomaz S.A., Hinkley T., Jones R.A., Twine R., Kahn K., Norris S.A., Draper C.E. Objectively Measured Physical Activity in South African Children Attending Preschool and Grade R: Volume, Patterns, and Meeting Guidelines. Pediatr. Exerc. Sci. 2020;32:150–156. doi: 10.1123/pes.2019-0216. PubMed DOI

Goodway J.D., Smith D.W. Keeping all children healthy: Challenges to leading an active lifestyle for preschool children qualifying for at-risk programs. Fam. Community Health. 2005;28:142–155. doi: 10.1097/00003727-200504000-00006. PubMed DOI

Gosselin V., Leone M., Laberge S. Socioeconomic and gender-based disparities in the motor competence of school-age children. J. Sports Sci. 2021;39:341–350. doi: 10.1080/02640414.2020.1822585. PubMed DOI

Jones R.A., Riethmuller A., Hesketh K., Trezise J., Batterham M., Okely A. Promoting Fundamental Movement Skill Development and Physical Activity in Early Childhood Settings: A Cluster Randomized Controlled Trial. Pediatr. Exerc. Sci. 2011;23:600–615. doi: 10.1123/pes.23.4.600. PubMed DOI

Dinkel D., Snyder K., Patterson T., Warehime S., Kuhn M., Wisneski D. An exploration of infant and toddler unstructured outdoor play. Eur. Early Child. Educ. Res. J. 2019;27:257–271. doi: 10.1080/1350293X.2019.1579550. DOI

Behrens R., Muchaka P. Child Independent Mobility in South Africa: The Case of Cape Town and its Hinterland. Glob. Stud. Child. 2011;1:167–184. doi: 10.2304/gsch.2011.1.3.167. DOI

Larouche R., Oyeyemi A.L., Prista A., Onywera V., Akinroye K.K., Tremblay M.S. A systematic review of active transportation research in Africa and the psychometric properties of measurement tools for children and youth. Int. J. Behav. Nutr. Phys. Act. 2014;11:129. doi: 10.1186/s12966-014-0129-5. PubMed DOI PMC

Draper C.E., Tomaz S.A., Stone M., Hinkley T., Jones R.A., Louw J., Twine R., Kahn K., Norris S. Developing Intervention Strategies to Optimise Body Composition in Early Childhood in South Africa. BioMed Res. Int. 2017;2017:1–13. doi: 10.1155/2017/5283457. PubMed DOI PMC

Cook C.J., Howard S.J., Scerif G., Twine R., Kahn K., Norris S.A., Draper C.E. Associations of physical activity and gross motor skills with executive function in preschool children from low-income South African settings. Dev. Sci. 2019;22:e12820. doi: 10.1111/desc.12820. PubMed DOI

VandenDriessche J.B., Vaeyens R., Vandorpe B., Lenoir M., Lefevre J., Philippaerts R.M. Variation in sport participation, fitness and motor coordination with socioeconomic status among Flemish children. Pediatric Exerc. Sci. 2012;24:113–128. doi: 10.1123/pes.24.1.113. PubMed DOI

Sandercock G.R., Lobelo F., Correa-Bautista J.E., Tovar G., Cohen D.D., Knies G., Ramírez-Vélez R. The Relationship between Socioeconomic Status, Family Income, and Measures of Muscular and Cardiorespiratory Fitness in Colombian Schoolchildren. J. Pediatr. 2017;185:81–87.e2. doi: 10.1016/j.jpeds.2016.12.058. PubMed DOI

Haro I.M.-D., Mora-Gonzalez J., Cadenas-Sanchez C., Borras P.A., Benito P.J., Chiva-Bartoll O., Torrijos-Niño C., Samaniego-Sánchez C., Quesada-Granados J.J., Sánchez-Delgado A., et al. Higher socioeconomic status is related to healthier levels of fatness and fitness already at 3 to 5 years of age: The PREFIT project. J. Sports Sci. 2019;37:1327–1337. doi: 10.1080/02640414.2018.1558509. PubMed DOI

Wolfe A.M., Lee J.A., Laurson K.R. Socioeconomic status and physical fitness in youth: Findings from the NHANES National Youth Fitness Survey. J. Sports Sci. 2020;38:534–541. doi: 10.1080/02640414.2020.1713688. PubMed DOI

Guedes D.P., Neto J.M., Lopes V.P., Silva A. Health-Related Physical Fitness Is Associated with Selected Sociodemographic and Behavioral Factors in Brazilian School Children. J. Phys. Act. Health. 2012;9:473–480. doi: 10.1123/jpah.9.4.473. PubMed DOI

Macdonald M., McGuire C., Havighurst R.J. Leisure Activities and the Socioeconomic Status of Children. Am. J. Sociol. 1949;54:505–519. doi: 10.1086/220414. DOI

Powell L.M., Slater S., Chaloupka F.J., Harper D. Availability of Physical Activity-Related Facilities and Neighbourhood Demographic and Socioeconomic Charateristics: A National Study. Am. J. Public Health. 2006;96:1676–1680. doi: 10.2105/AJPH.2005.065573. PubMed DOI PMC

Micklesfield L., Pedro T., Twine R., Kinsman J., Pettifor J., Tollman S., Kahn K., Norris S. Physical activity patterns and determinants in rural South African adolescents. J. Sci. Med. Sport. 2012;15:S251. doi: 10.1016/j.jsams.2012.11.610. DOI

Jayanthi N.A., Holt J.D.B., Labella C.R., Dugas L.R. Socioeconomic Factors for Sports Specialization and Injury in Youth Athletes. Sports Health. 2018;10:303–310. doi: 10.1177/1941738118778510. PubMed DOI PMC

Lennox A., Pienaar A., Wilders C. Physical fitness and the physical activity status of 15-year-old adolescents in a semi-urban community. S. Afr. J. Res. Sport Phys. Educ. Recreat. 2008;30:59–73. doi: 10.4314/sajrs.v30i1.25983. DOI

Bürgi R., Tomatis L., Murer K., de Bruin E.D. Spatial physical activity patterns among primary school children living in neighbourhoods of varying socioeconomic status a cross-sectional study using accelerometery and Global Positioning System. BMC Public Health. 2016;16:1–12. doi: 10.1186/s12889-016-2954-8. PubMed DOI PMC

Ginsburg K.R., the Committee on Communications. the Committee on Psychosocial Aspects of Child and Family Health The Importance of Play in Promoting Healthy Child Development and Maintaining Strong Parent-Child Bonds. Pediatrics. 2007;119:182–191. doi: 10.1542/peds.2006-2697. PubMed DOI

Masters R.S., Maxwell J.P. Skill Acquisition in Sport. Routledge; Milton Park, UK: 2004. Implicit motor learning, reinvestment and movement disruption: What you don’t know won’t hurt you; pp. 231–252.

Kal E., Prosée R., Winters M., Van Der Kamp J. Does implicit motor learning lead to greater automatization of motor skills compared to explicit motor learning? A systematic review. PLoS ONE. 2018;13:e0203591. doi: 10.1371/journal.pone.0203591. PubMed DOI PMC

Veraksa A., Aires J.Q., Leonov S., Musálek M. Vygotsky’s Theory in Early Childhood Education and Research. Routledge; Milton Park, UK: 2018. The Vygotskian approach in physical education for early years; pp. 179–190.

Ponthieux N.A., Barker D.G. Relationship between Socioeconomic Status and Physical Fitness Measures. Res. Quarterly. Am. Assoc. Health Phys. Educ. Recreat. 1965;36:464–472. doi: 10.1080/10671188.1965.10614720. PubMed DOI

Pavón D.J. Socioeconomic status influences physical fitness in European adolescents independently of body fat and physical activity: The HELENA Study. Nutr. Hosp. 2010;25:311–316. PubMed

Coe D.P., Peterson T., Blair C., Schutten M.C., Peddie H. Physical Fitness, Academic Achievement, and Socioeconomic Status in School-Aged Youth. J. Sch. Health. 2013;83:500–507. doi: 10.1111/josh.12058. PubMed DOI

Stastny P., Lehnert M., Croix M.D.S., Petr M., Svoboda Z., Maixnerova E., Varekova R., Botek M., Petrek M., Kocourkova L., et al. Effect of COL5A1, GDF5, and PPARA Genes on a Movement Screen and Neuromuscular Performance in Adolescent Team Sport Athletes. J. Strength Cond. Res. 2019;33:2057–2065. doi: 10.1519/JSC.0000000000003142. PubMed DOI

Chan T.-F., Poon A., Basu A., Addleman N.R., Chen J., Phong A., Byers P.H., Klein T.E., Kwok P.-Y. Natural variation in four human collagen genes across an ethnically diverse population. Genomics. 2008;91:307–314. doi: 10.1016/j.ygeno.2007.12.008. PubMed DOI PMC

Adamo K.B., Sheel A.W., Onywera V., Waudo J., Boit M., Tremblay M.S. Child obesity and fitness levels among Kenyan and Canadian children from urban and rural environments: A KIDS-CAN Research Alliance Study. Pediatr. Obes. 2011;6:e225–e232. doi: 10.3109/17477166.2010.543683. PubMed DOI

Prista A., Maia J.A.R., Damasceno A., Beunen G. Anthropometric indicators of nutritional status: Implications for fitness, activity, and health in school-age children and adolescents from Maputo, Mozambique. Am. J. Clin. Nutr. 2003;77:952–959. doi: 10.1093/ajcn/77.4.952. PubMed DOI

Tompsett C., Sanders R., Taylor C., Cobley S. Pedagogical Approaches to and Effects of Fundamental Movement Skill Interventions on Health Outcomes: A Systematic Review. Sports Med. 2017;47:1795–1819. doi: 10.1007/s40279-017-0697-z. PubMed DOI

Katzmarzyk P., Malina R., Beunen G. The contribution of biological maturation to the strength and motor fitness of children. Ann. Hum. Biol. 1997;24:493–505. doi: 10.1080/03014469700005262. PubMed DOI

Malina R.M., Bouchard C., Bar-Or O. Growth, Maturation, and Physical Activity. Human Kinetics; Champaign, IL, USA: 2004.