Introduction: The objective of the study was to examine the relationship between the values of selected parameters of physical function, body composition, body mass index (BMI) and biochemical markers of metabolic health with the total testosterone (TT) levels in adult males. We aimed to analyse the correlation between these values and variations in the TT levels. Methods: A total of 17 subjects (age = 50.2 ± 8.1 years, TT = 11.4 ± 3.8 nmol/l) were included in the study. Subjects were tested on physical function (1RM on leg press, bench-press, handgrip, VO2max), body composition (DXA), biochemical parameters (morning fasting blood samples). Results: TT was inversely correlated with abdominal circumference (AC) (p < 0.01) and with overall body fat, measured in kg (p < 0.01). On a biochemical level, significant correlations were found between TT and insulin (p < 0.01), and TT and homeostasis model assessment of insulin resistance (HOMA-IR) (p < 0.01). Physical function, muscle strength or lean mass were not significantly correlated with TT. Conclusion: The main finding of this study was that testosterone levels had a strong inverse correlation with abdominal circumference and total body fat mass. On metabolic level, strong inverse correlation was also found between TT with insulin and TT with HOMA-IR. However, we did not find statistically significant correlation between total testosterone levels and lean mass, muscle strength or physical function in middle aged males.
- MeSH
- dospělí MeSH
- klinická studie jako téma MeSH
- lidé středního věku MeSH
- lidé MeSH
- obezita MeSH
- senioři MeSH
- složení těla MeSH
- testosteron * analýza MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- Publikační typ
- práce podpořená grantem MeSH
Cieľom našej práce bolo zistiť, či existuje vzťah medzi výkonom na 50 m prsia a jednotlivými silovými prejavmi dolných končatín na suchu a vo vode u výkonnostných plavcov. Našej štúdie sa dobrovoľne zúčastnilo dvanásť výkonnostných plavcov (22,41±3,87 rokov) z plaveckého klubu VŠK UK Bratislava. Prejav sily dolných končatín sme sledovali v testoch: šesť-rázové maximum v drepe, priemerný svalový výkon v excentrickej fáze pohybu počas 30 sekúnd v drepe, silový gradient za 200 m.s-1 , maximálnu izometrickú silu, priemerný svalový výkon pri plávaní prsiarskymi nohami v izokinetickom režime počas 30 sekúnd. Aktuálny výkon na 50 m prsia sme zisťovali pomocou zariadenia Omega. Vzťahy, medzi výkonom na 50 m prsia a silovým prejavom dolných končatín, boli preukázané pre šesť-rázové maximum v drepe (r = 0,79; p < 0,01); priemerný svalový výkon v excentrickej fáze pohybu počas 30 sekúnd v drepe (r = 0,62; p < 0,05); silový gradient za 200 m.s-1 (r = 0,66; p < 0,05); maximálnu izometrickú silu (r = 0,65, p < 0,05); priemerný svalový výkon pri plávaní prsiarskymi nohami v izokinetickom režime počas 30 sekúnd (r = 0,83; p < 0,01). Výsledky výskumu preukázali významný vzťah medzi silou dolných končatín a výkonom na 50 m prsia.
The aim of this study was to identify the relationship between performance at 50 m breastroke and lower body strength. Twelve male volunteers from VSK UK Bratislava participated in this research (22,41 ± 3,87 years). Lower body strength we measured in tests: six repetition maxim in squat, mean power of eccentric phase of movement during 30 seconds in squat; maximal isometric force, rate of force dewelopment during 200 m.s-1 , mean power of breastroke legs during 30 seconds in isokinetic mode. Actual perfomance at 50 m breaststroke was measured by Omega touchpad. Relationship between performance at 50 m breaststroke and lower body strength was for six repetition maximum in squat (r = 0,79; p < 0,01); mean power of eccentric phase of movement during 30 seconds in squat (r = 0,62; p < 0,05); rate of force dewelopment during 200 m.s-1 (r = 0,66; p < 0,05); maximal isometric force (r = 0,65, p < 0,05); , mean power of breastroke legs during 30 seconds in isokinetic mode (r = 0,83; p < 0,01). Results showed significant relationship between performance at 50 m breaststroke and lower body strength.
