Leg muscle volume and power development of Tunisian adolescents: Effect of socioeconomic status

摘要

Objective. - We undertook to examine growth patterns and the development of leg muscle power by socioeconomic classes among healthy Tunisian adolescents aged 13 to 19 years. Methods. - Five hundred and sixty Tunisian healthy adolescents (259 males and 301 females) were randomly selected. Anthropometric variables were measured and socioeconomic status was assessed according to a standard questionnaire. Jump heights and leg power were provided by an Optojump device using countermovement jump and squat jump. Results. - Tunisian adolescents from high socioeconomic status had significant differences (P < 0.05) and higher mean values of anthropometrics variables than those from low socioeconomic status for standing height (1.66 m +/- 0.86; 1.62 m +/- 0.92), fat free mass (42.86 kg +/- 8.83; 40.36 kg +/- 8.78) and leg muscle volume (5.74 L +/- 1.30; 5.19 L +/- 1.23). Also, adolescents from high socioeconomic status had significant differences (P < 0.05) and higher mean values of squat jump height (0.2 m +/- 0.06; 0.17 +/- 0.05), squat jump power (10.63 w.kg(-1)+/- 2; 9.95 +/- 1.61), countermovement jump height (0.21 m +/- 0.07; 0.18 m +/- 0.05) and countermovement jump power (11.54 w.kg(-1) +/- 2.16; 10.75 w.kg(-1)+/- 1.78) than those from low socioeconomic status. General Linear Model was used to analyze the interrelation between anthropometric variables and socioeconomic status with leg power and jump height. The main factors significantly affecting the vertical jumping performance were age, waist size, gender and socioeconomic status. Conclusion. - The socioeconomic status act on growth patterns and the development of leg muscle power in healthy Tunisian adolescents aged between 13-19 years. Tunisian adolescents from high socioeconomic status had higher mean values of leg muscle volume than those from low socioeconomic status. (C) 2021 Elsevier Masson SAS. All rights reserved.