PURPOSE: This study analyzed the kinematics and muscle activity during the stand-up paddleboarding (SUP) under different visual focus points in three conditions: i) eyes on the board nose, ii) looking at the turn buoy, and iii) free choice. METHODS: Fourteen male paddleboarders (24.2 ± 7.1 years) performed three trials covering 65 m, and the electromyographic (EMG) activation patterns and kinematic parameters in four cycle strokes for the left and right sides were analyzed. Surface EMG of the upper trapezius, biceps brachii, triceps brachii, tibialis anterior, and gastrocnemius medialis were recorded. The data were processed according to the percentage of maximum voluntary contraction (%MVC). Speed, stroke frequency (SF), stroke length, and stroke index (SI) were analyzed. RESULTS: The speed, SF, and SI (p < 0.01, η2 ≥ 0.42) showed significant variance between conditions, with the free condition achieving the highest speed (1.20 ± 0.21 m/s), SF (0.65 ± 0.13 Hz) and SI (2.25 ± 0.67 m2/s). This condition showed greater neuromuscular activity, particularly in the triceps brachii during both the left (42.25 ± 18.76 %MVC) and right recoveries (32.93 ± 16.06 %MVC). During the pull phase, the free choice presented higher biceps brachii activity (8.51 ± 2.80 %MVC) compared to the eyes on the board nose (6.22 ± 2.41 %MVC; p < 0.01), while showing lower activity in the triceps brachii (10.02 ± 4.50 %MVC vs. 16.52 ± 8.45 %MVC; p < 0.01) and tibialis anterior (12.24 ± 7.70 %MVC vs. 17.09 ± 7.73 %MVC; p < 0.01) compared to looking at the turn buoy. CONCLUSION: These results suggest that a free visual focus allows paddleboarders to enhance their kinematics and muscle activation, highlighting the significance of visual focus strategies in improving both competitive and recreational SUP performance.

Brno University of Technology Brno Czech Republic

Department of Sport Sciences Sport Sciences School of Rio Maior Santarém Portugal

Department of Sport Sciences Universidade da Beira Interior Covilhã Portugal

Polytechnic Institute of Bragança Bragança Portugal

Research Center in Sports Sciences Health Sciences and Human Development Covilhã Portugal

Research Centre for Active Living and Wellbeing Polytechnic Institute of Bragança Bragança Portugal

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Abellán-Aynés O, Alacid F, López-Plaza D. Morphology and maturity status and their relationship with stroke steadiness in young sprint paddlers. Applied Sciences. 2023;13(16):9423. doi: 10.3390/app13169423. DOI

Abellán-Aynés O, López-Plaza D, Martínez-Aranda LM, Alacid F. Inter-stroke steadiness: a new kinematic variable related to 200m performance in young canoeists. Sports Biomechanics. 2024;23(12):2886–2898. doi: 10.1080/14763141.2022.2071327. PubMed DOI

Afsharipour B, Soedirdjo S, Merletti R. Two-dimensional surface EMG: the effects of electrode size, interelectrode distance and image truncation. Biomedical Signal Processing and Control. 2019;49:298–307. doi: 10.1016/j.bspc.2018.12.001. DOI

Al-Qaisi S, Aghazadeh F. Electromyography analysis: comparison of maximum voluntary contraction methods for anterior deltoid and trapezius muscles. Procedia Manufacturing. 2015;3(3):4578–4583. doi: 10.1016/j.promfg.2015.07.475. DOI

Barbosa TM, Bragada JA, Reis VM, Marinho DA, Carvalho C, Silva AJ. Energetics and biomechanics as determining factors of swimming performance: updating the state of the art. Journal of Science and Medicine in Sport. 2010;13(2):262–269. doi: 10.1016/j.jsams.2009.01.003. PubMed DOI

Boettcher CE, Ginn KA, Cathers I. Standard maximum isometric voluntary contraction tests for normalizing shoulder muscle EMG. Journal of Orthopaedic Research. 2008;26(12):1591–1597. doi: 10.1002/jor.20675. PubMed DOI

Brown BM, Lauder M, Dyson R. Notational analysis of sprint kayaking: differentiating between ability levels. International Journal of Performance Analysis in Sport. 2011;11(1):171–183. doi: 10.1080/24748668.2011.11868538. DOI

Bull HG, Atack AC, North JS, Murphy CP. The effect of attentional focus instructions on performance and technique in a complex open skill. European Journal of Sport Science. 2023;23(10):2049–2058. doi: 10.1080/17461391.2022.2150895. PubMed DOI

Castelein B, Cagnie B, Parlevliet T, Danneels L, Cools A. Optimal normalization tests for muscle activation of the levator scapulae, pectoralis minor, and rhomboid major: an electromyography study using maximum voluntary isometric contractions. Archives of Physical Medicine and Rehabilitation. 2015;96(10):1820–1827. doi: 10.1016/j.apmr.2015.06.004. PubMed DOI

Dyson RJ, Buchanan M, Farrington TA, Hurrion PD. Electromyographic activity during windsurfing on water. Journal of Sports Sciences. 1996;14(2):125–130. doi: 10.1080/02640419608727694. PubMed DOI

Ferguson CJ. An effect size primer: a guide for clinicians and researchers. Professional Psychology: Research and Practice. 2009;40(5):532–538. doi: 10.1037/a0015808. DOI

Freitas J, Conceição A, Šťastný J, Louro H, Leitão L, Torres D, Marinho DA, Neiva HP. Neuromuscular assessment of a stand-up paddle stroke. Applied Sciences. 2023;13(24):13265. doi: 10.3390/app132413265. DOI

Goreham JA, Miller KB, Frayne RJ, Ladouceur M. Pacing strategies and relationships between speed and stroke parameters for elite sprint kayakers in single boats. Journal of Sports Sciences. 2021;39(19):2211–2218. doi: 10.1080/02640414.2021.1927314. PubMed DOI

Hermens HJ, Freriks B, Disselhorst-Klug C, Rau G. Development of recommendations for SEMG sensors and sensor placement procedures. Journal of Electromyography and Kinesiology. 2000;10(5):361–374. doi: 10.1016/S1050-6411(00)00027-4. PubMed DOI

Hibbert JE, Kaufman C, Schmidt DJ. Shoulder, trunk, and hip sagittal plane kinematics during stand-up paddle boarding. Sports. 2023;11(8):152. doi: 10.3390/sports11080152. PubMed DOI PMC

Hohmann A, Fehr U, Kirsten R, Krüger T. EMG-model of the backstroke start technique. Portuguese Journal of Sport Sciences. 2006;6:37–40.

Hopkins WG, Marshall SW, Batterham AM, Hanin J. Progressive statistics for studies in sports medicine and exercise science. Medicine & Science in Sports & Exercise. 2009;41(1):3–12. doi: 10.1249/MSS.0b013e31818cb278. PubMed DOI

Liu P, Liu L, Martel F, Rancourt D, Clancy EA. Influence of joint angle on EMG-torque model during constant-posture, quasi-constant-torque contractions. Journal of Electromyography and Kinesiology. 2013;23(5):1020–1028. doi: 10.1016/j.jelekin.2013.06.011. PubMed DOI

Marchant D, Greig M, Scott C. Attentional focusing strategies influence muscle activity during isokinetic biceps curls. Athletic Insight. 2008;10:2.

Michael JS, Smith R, Rooney KB. Determinants of kayak paddling performance. Sports Biomechanics. 2009;8(2):167–179. doi: 10.1080/14763140902745019. PubMed DOI

Morais JE, Barbosa TM, Forte P, Silva AJ, Marinho DA. Young swimmers’ anthropometrics, biomechanics, energetics, and efficiency as underlying performance factors: a systematic narrative review. Frontiers in Physiology. 2021;12:691919. doi: 10.3389/fphys.2021.691919. PubMed DOI PMC

National Weather Service . The beaufort wind force scale. Silver Spring: National Weather Service; 2022.

Neiva HP, Faíl LB, Marinho DA. A 30-min test applied to stand-up paddleboarding: a pilot study. Journal of Human Sport and Exercise. 2020;15(Proc4):S1387–S1393. doi: 10.14198/jhse.2020.15.Proc4.35. DOI

Neumann DL. A systematic review of attentional focus strategies in weightlifting. Frontiers in Sports and Active Living. 2019;1:1172. doi: 10.3389/fspor.2019.00007. PubMed DOI PMC

Pesce C, Tessitore A, Casella R, Pirritano M, Capranica L. Focusing of visual attention at rest and during physical exercise in soccer players. Journal of Sports Sciences. 2007;25(11):1259–1270. doi: 10.1080/02640410601040085. PubMed DOI

Peter K. ABC of EMG: a practical introduction to kinesiological electromyography. Noraxon INC, USA: 2005.

Roman-Liu D, Bartuzi P. Influence of type of MVC test on electromyography measures of biceps brachii and triceps brachii. International Journal of Occupational Safety and Ergonomics. 2018;24(2):200–206. doi: 10.1080/10803548.2017.1353321. PubMed DOI

Ruess C, Kristen KH, Eckelt M, Mally F, Litzenberger S, Sabo A. Activity of trunk and leg muscles during stand up paddle surfing. Procedia Engineering. 2013a;60(3):57–61. doi: 10.1016/j.proeng.2013.07.031. DOI

Ruess C, Kristen KH, Eckelt M, Mally F, Litzenberger S, Sabo A. Stand up paddle surfing-an aerobic workout and balance training. Procedia Engineering. 2013b;60:62–66. doi: 10.1016/j.proeng.2013.07.032. DOI

Schram B, Furness J, Kemp-Smith K, Sharp J, Cristini M, Harvie D, Keady E, Ghobrial M, Tussler J, Hing W, Nessler J, Becker M. A biomechanical analysis of the stand-up paddle board stroke: a comparative study. PeerJ. 2019;7(2):e8006. doi: 10.7717/peerj.8006. PubMed DOI PMC

Schram B, Hing W, Climstein M. Profiling the sport of stand-up paddle boarding. Journal of Sports Sciences. 2016a;34(10):937–944. doi: 10.1080/02640414.2015.1079331. PubMed DOI

Schram B, Hing W, Climstein M. The physiological, musculoskeletal and psychological effects of stand up paddle boarding. BMC Sports Science, Medicine and Rehabilitation. 2016b;8:32. doi: 10.1186/s13102-016-0057-6. PubMed DOI PMC

Shookster D, Lindsey B, Cortes N, Martin JR. Accuracy of commonly used age-predicted maximal heart rate equations. International Journal of Exercise Science. 2020;13(7):1242. doi: 10.70252/XFSJ6815. PubMed DOI PMC

Tsai F-H, Wu W-L, Chen Y-J, Liang J-M, Hou Y-Y. Electromyography analysis of muscle activation during stand-up paddle boarding: a comparison of paddling in kneeling and standing positions. Applied Sciences. 2020;10(7):2356. doi: 10.3390/app10072356. DOI

Vaquero-Cristóbal R, Alacid F, López-Plaza D, Muyor JM, López-Miñarro PA. Kinematic variables evolution during a 200-m maximum test in young paddlers. Journal of Human Kinetics. 2013;38:15–22. PubMed PMC

Waydia S-E, Woodacre T. Paddle-boarding: fun, new sport or an accident waiting to happen? Trauma Monthly. 2016;21(3):429. PubMed PMC

Wulf G, Dufek JS, Lozano L, Pettigrew C. Increased jump height and reduced EMG activity with an external focus. Human Movement Science. 2010;29(3):440–448. doi: 10.1016/j.humov.2009.11.008. PubMed DOI