The influence of training status on the drop in muscle strength after acute exercise
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The influence of training status on the drop in muscle strength after acute exercise. / Pingel, Jessica; Moerch, L; Kjaer, M; Langberg, H.
In: Journal of Applied Physiology, Vol. 106, No. 4, 2009, p. 605-11.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - The influence of training status on the drop in muscle strength after acute exercise
AU - Pingel, Jessica
AU - Moerch, L
AU - Kjaer, M
AU - Langberg, H
N1 - Keywords: Adult; Humans; Immobilization; Male; Muscle Contraction; Muscle Fatigue; Muscle, Skeletal; Physical Endurance; Physical Exertion; Physical Fitness
PY - 2009
Y1 - 2009
N2 - Skeletal muscles fatigue after exercise, and reductions in maximal force appear. A difference in training status between the legs was introduced by unilateral immobilization of the calf muscles for 2 weeks in young men, who were randomly assigned to two groups, either a RUN group (n = 8) that was exposed to prolonged exercise (1-h running: individual pace) or a REST group (n = 12) that did no exercise after immobilization. Cross-sectional area (CSA) of the triceps-surae muscles was calculated by magnetic resonance imaging (MRI), and maximal voluntary contraction (MVC) force of the plantar flexors was measured before and after immobilization and after the running protocol. The CSA of triceps-surae muscles decreased significantly with a 7% reduction in both groups. A significant drop in the MVC of the triceps-surae muscle (10%; P < 0.05) was observed in response to immobilization. When subjected to running exercise immediately after immobilization, the muscle strength of the triceps-surae muscles dropped even further, but just in the immobilized leg (41%; P < 0.05). The present study highlights the importance of determining the muscle endurance when evaluating the effect of immobilization on muscle parameters.
AB - Skeletal muscles fatigue after exercise, and reductions in maximal force appear. A difference in training status between the legs was introduced by unilateral immobilization of the calf muscles for 2 weeks in young men, who were randomly assigned to two groups, either a RUN group (n = 8) that was exposed to prolonged exercise (1-h running: individual pace) or a REST group (n = 12) that did no exercise after immobilization. Cross-sectional area (CSA) of the triceps-surae muscles was calculated by magnetic resonance imaging (MRI), and maximal voluntary contraction (MVC) force of the plantar flexors was measured before and after immobilization and after the running protocol. The CSA of triceps-surae muscles decreased significantly with a 7% reduction in both groups. A significant drop in the MVC of the triceps-surae muscle (10%; P < 0.05) was observed in response to immobilization. When subjected to running exercise immediately after immobilization, the muscle strength of the triceps-surae muscles dropped even further, but just in the immobilized leg (41%; P < 0.05). The present study highlights the importance of determining the muscle endurance when evaluating the effect of immobilization on muscle parameters.
U2 - 10.1007/s00421-009-1055-0
DO - 10.1007/s00421-009-1055-0
M3 - Journal article
C2 - 19363682
VL - 106
SP - 605
EP - 611
JO - Journal of Applied Physiology
JF - Journal of Applied Physiology
SN - 8750-7587
IS - 4
ER -
ID: 20649310