This is a monocentric study comparing hamstring and quadriceps neuromuscular fatigue after simulated soccer game, anaerobic and aerobic training sessions. The purpose of this study was: 1. To quantify the decrease of isometric force immediately after a simulate soccer game. 2. To characterize peripheral and central fatigue between hamstring and quadriceps muscles and described the kinetics of recovery after specific tasks of soccer training. 3. To compare the level neuromuscular fatigue induced by anaerobic and aerobic training. 4. To highlight correlation between neuromuscular fatigue and performance markers.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
15
surface EMG: surface electrodes will be positioned on the muscles to evaluate the level of muscle activation non invasive muscular neurostimulations : application of a percutaneous electrical stimulation of the motor nerve of the considered muscle and a direct electrical stimulation of the muscle
Hopitaux Universitaires de Strasbourg
Strasbourg, France
RECRUITINGDifference in maximal isometric hamstring strength before and immediately after exercise (i.e., pre vs. immediate post exercise) expressed as a percentage (%).
Time frame: Before and immediately post exercise (i.e., during the first minute after cessation of exercise)
Relative difference (in %) in maximum isometric hamstring strength before and after exercise (i.e., pre- vs. post-exercise), relative to pre-exercise strength across different test types.
Time frame: Before and immediately post exercise, 5, 10, 15, 30-minutes and 24 and 48-hours post-exercise
Relative difference (in %) in maximal isometric quadriceps strength before and after exercise (i.e., pre vs. post exercise), related to preexercise strength according to the different types of tests.
Time frame: Before and immediately post exercise, 5, 10, 15, 30-minutes and 24 and 48-hours post-exercise
Relative difference (%) in maximum isometric hamstring and quadriceps strength for each test type at the different times of interest.
Time frame: Before and immediately post exercise, 5, 10, 15, 30-minutes and 24 and 48-hours post-exercise
Difference in pre- and post-exercise (i.e., pre- vs. post-exercise) hamstring potentiated jerk amplitude (N) relative to pre-exercise amplitude by event type at different times of interest.
Time frame: Before and immediately post exercise, 5, 10, 15, 30-minutes and 24 and 48-hours post-exercise
Difference in pre- and post-exercise (i.e., pre- vs. post-exercise) potentiated jerk amplitude (N) of the quadriceps, relative to pre-exercise amplitude, by test type at different times of interest.
Time frame: Before and immediately post exercise, 5, 10, 15, 30-minutes and 24 and 48-hours post-exercise
Difference in amplitude of the potentiated jerk (N) before and after exercise, related to the preexercise amplitude according to the muscle involved (hamstrings or quadriceps) and the type of test at different times of interest.
Time frame: Before and immediately post exercise, 5, 10, 15, 30-minutes and 24 and 48-hours post-exercise
Difference in the level of voluntary hamstring activation, expressed in newtons (N), before and after exercise, related to the pre-exercise action level, according to the type of test at different times of interest.
Time frame: Before and immediately post exercise, 5, 10, 15, 30-minutes and 24 and 48-hours post-exercise
Difference in the level of voluntary quadriceps activation, expressed in newtons (N), before and after exercise, related to the pre-exercise action level, according to the type of test at different times of interest.
Time frame: Before and immediately post exercise, 5, 10, 15, 30-minutes and 24 and 48-hours post-exercise
Difference in the level of voluntary action before and after exercise, related to the level of action before exercise, according to the muscle involved (hamstrings or quadriceps) and the type of test at different times of interest.
Time frame: Before and immediately post exercise, 5, 10, 15, 30-minutes and 24 and 48-hours post-exercise
Differences in overall fatigue, peripheral fatigue, and central fatigue of hamstrings versus quadriceps between exercise modalities.
Determine the modalities of exercises which induce the highest level of fatigue and characterize the etiology of neuromuscular fatigue (i.e., peripheral or central) for typical drills performed daily by elite soccer players
Time frame: Before and immediately post exercise, 5, 10, 15, 30-minutes and 24 and 48-hours post-exercise
Ratio (%) of initial to post-exercise values based on field indicators and neuromuscular fatigue.
Time frame: Before and immediately post exercise, 5, 10, 15, 30-minutes and 24 and 48-hours post-exercise
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