Dynamics of Muscular Performance Indices during the 30‑s Vertical Jump Test in Endurance and Sprint Cohorts

Abstract

Research background and hypothesis. According the methodological requirement testing procedures do not modify the main training objectives. It is well known that specificity of performance assessment tests is important if we want to compare performance of different groups tested.Research aim was to find out the peculiarities of muscular performance indices in sprint and endurance cohorts while performing a 30-s vertical jump test.Research methods. The participants of the study were two groups of athletes, i. e. sprint and endurance runners. The participants of the study performed a 30-s vertical jumps test with maximal efforts. The sum of height of all jumps was calculated by a special computerized program and the values in height of jumps, contact time and relative power at onset of workload and at each 5 seconds of the test were analyzed.Research results. The difference between the cohorts in jumps height was statistically significant (p < 0.05) during the whole series of jumps. Athletes’ adaptation to speed-power type of exercising produced higher anaerobic muscle performance indices while performing 30-s duration jumps test. Endurance runners usually demonstrate lower results in jumping than sprint- athletes and they compensate reduced muscular power with prolonged duration of take-off.Discussion and conclusions. Despite some methodological limitations the results of this study show that the assessment of muscular performance indices allows assessing the peculiarities of dynamics of relative muscle power and fatigue.

Simulating fatigue in squat jumps: A preliminary investigation

“…This is in agreement with previous research as decreases in JH and flight time have consistently been reported with fatigue. [4][5][6] It is interesting that Pupo and colleagues noted larger decreases in JH, after the 30s continuous jump test (26% versus 17.4% in the current study). This raises the question of if the load's relative intensity is associated with the fatigue magnitude to be simulated.…”

“…Fatigue may be accompanied by decreases in jump height, flight time, eccentric force production, power, vertical stiffness, and knee flexion angles. [4][5][6] Fatigue has also been associated with increases in ground contact time and with decreases in angular velocities and accelerations in jumps. 4,[6][7] Furthermore, fatigue has been associated with knee joint stability decreases, that may increase the risk of injury in both males and females.…”

“…[4][5][6] Fatigue has also been associated with increases in ground contact time and with decreases in angular velocities and accelerations in jumps. 4,[6][7] Furthermore, fatigue has been associated with knee joint stability decreases, that may increase the risk of injury in both males and females. 8,9 The above-mentioned research has shown that performance decreases in loaded conditions and in fatigued situations.…”