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document
Acute effects of static active or dynamic active stretching on eccentric-exercise-induced hamstring muscle damage . OBJECTIVES To examine whether an acute bout of active or dynamic hamstring-stretching exercises would reduce the amount of muscle damage observed after a strenuous eccentric task and to determine whether the stretching protocols elicit similar responses . DESIGN A randomized controlled clinical trial . METHODS Thirty-six young male students performed 5 min of jogging as a warm-up and were allocated to 1 of 3 groups : 3 min of static active stretching ( SAS ) , 3 min of dynamic active stretching ( DAS ) , or control ( CON ) . All subjects performed eccentric exercise immediately after stretching . Heart rate , core temperature , maximal voluntary isometric contraction , passive hip flexion , passive hamstring stiffness ( PHS ) , plasma creatine kinase activity , and myoglobin were recorded at prestretching , at poststretching , and every day after the eccentric exercises for 5 d. RESULTS After stretching , the change in hip flexion was significantly higher in the SAS ( 5° ) and DAS ( 10.8° ) groups than in the CON ( -4.1° ) group . The change in PHS was significantly higher in the DAS ( 5.6 % ) group than in the CON ( -5.7 % ) and SAS ( -6.7 % ) groups . Furthermore , changes in muscle-damage markers were smaller in the SAS group than in the DAS and CON groups . CONCLUSIONS Prior active stretching could be useful for attenuating the symptoms of muscle damage after eccentric exercise . SAS is recommended over DAS as a stretching protocol in terms of strength , hamstring range of motion , and damage markers .
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Intervention_Physical
static active or dynamic active stretching
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Intervention_Physical
active or dynamic hamstring-stretching exercises
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Intervention_Physical
jogging
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Intervention_Physical
3 min of static active stretching ( SAS )
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Intervention_Physical
3 min of dynamic active stretching ( DAS )
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Intervention_Control
control ( CON )
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Intervention_Physical
eccentric exercise
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Intervention_Physical
stretching
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Intervention_Physical
SAS
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Intervention_Physical
DAS
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Intervention_Control
CON
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Intervention_Physical
DAS
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Intervention_Control
CON
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Outcome_Physical
eccentric-exercise-induced hamstring muscle damage .
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Outcome_Physical
change in hip flexion
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Participant_Condition
eccentric-exercise-induced hamstring muscle damage
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Participant_Sample-size
Thirty-six
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Participant_Age
young
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Participant_Sex
male
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Participant_Age
students
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Participant_Condition
performed 5 min of jogging as a warm-up
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Participant_Condition
eccentric exercise immediately after stretching