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Strength and endurance training reduces the loss of eccentric hamstring torque observed after soccer specific fatigue
Martyn J Matthews1, Kate Heron1, Stefanie Todd1
1School of Health Sciences, Centre for Health Sciences Research, University of Salford, Salford, M66PU, UK.
Objectives:
To investigate the effect of two hamstring training protocols on eccentric peak torque before and after soccer specific fatigue.
Participants:
Twenty-two university male soccer players.
Design:
Isokinetic strength tests were performed at 60°/s pre and post fatigue, before and after 2 different training interventions. A 45-min soccer specific fatigue modified BEAST protocol (M-BEAST) was used to induce fatigue. Players were randomly assigned to a 4 week hamstrings conditioning intervention with either a maximum strength (STR) or a muscle endurance (END) emphasis.
Main Outcome Measures:
The following parameters were evaluated: Eccentric peak torque (EccPT), angle of peak torque (APT), and angle specific torques at knee joint angles of 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° and 90°.
Results:
There was a significant effect of the M-BEAST on the Eccentric torque angle profile before training as well as significant improvements in post-fatigue torque angle profile following the effects of both strength and muscle endurance interventions.
Conclusions:
Forty-five minutes of simulated soccer activity leads to reduced eccentric hamstring torque at longer muscle lengths. Short-term conditioning programs (4-weeks) with either a maximum strength or a muscular endurance emphasis can equally reduce fatigue induced loss of strength over this time period.