Abstract
The research group consisted of elite soccer players (n = 138, age = 25,1 +- 4,7 years, height = 184,2 +- 7,2 cm, weight = 79,7 +- 8,1 kg). For recording force effect of lower limbs on the surface, two force platforms Kistler B8611A (KISTLER Instrumente AG, Switzerland) were used.
All participants performed three types of a vertical jump, T1 - countermovement jump with arms included, T2 - countermovement jump with arms excluded, T3 - squat jump. Evaluation parameters were: high of the jump (cm), maximal strength produced by separate lower limb FmaxR(L) and strength impulse produced by separate lower limb during the take off (Ns-1).
The heights of the jumps were CMJ-FA=42,83+-4,88 cm, CMJ=37,55+-4,18 cm a SQJ=35,97+-3,97cm. Maximal strength produced by separate lower limb was recalculated by dividing to weight of every player as a strength for one kilogram; FmaxPT1=1,32+-0,11 N.kg-1 resp.
FmaxLT1=1,27+-0,11 N.kg-1; FmaxPT2=1,33+-0,14 N.kg-1 resp. FmaxPT2=1,28+-0,16 N.kg-1; FmaxPT3=1,12+-0,12 N.kg-1 resp.
FmaxLT3=1,09+-0,09 N.kg-1