Affiliations: [a] High Institute of Sport and Physical Education of Kef, University of Jendouba, Kef, Tunisia | [b] High Institute of Sport and Physical Education of Ksar Said, University of “La Manouba”, Manouba, Tunisia | [c] Faculty of Medicine of Tunis, Rabta Hospital, University of Tunis El Manar, Tunis, Tunisia
Correspondence:
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Corresponding author: Souhail Bchini, High Institute of Sport and Physical Education of Kef, University of Jendouba, Le Kef, Tunisia. E-mail: souhail.bchini@gmail.com.
Abstract: BACKGROUND: Vertical jump is an index representing leg power. It is important to determine factors that influence the vertical jump to help athletes improve their leg power. OBJECTIVE: This study aimed to determine the relationship between lower limbs muscle volume and peak vertical jump (VJ) power in children for both sexes. METHODS: Fourty children healthy boys (n= 20) and girls (n= 20) aged 10 to 12 years old, randomly performed three VJ modalities: squat jump (SJ), counter movement jump without (CMJ) and with arm swings (CMJarms). Lower limbs muscle volume (MV) estimated using a standard anthropometric method. Peak power (PP) calculated by Sayers equation. RESULTS: significant correlations between MV and Peak vertical jump power showed for both sexes. Likewise, significant correlations were found between MV and body mass for boys (r= 0.66; p= 0.001) and for girls (r= 0.59; p= 0.006). CONCLUSIONS: The correlation observed between peak vertical jump power and MV in both sexes can be considered as estimation tool of the lower limbs muscle power. Lower limb’s muscle volume are determining factor in muscle power for both sexes.
