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J Sports Med Phys Fitness. 2000 Jun;40(2):126-30.

Effects of specific warm-up at various intensities on energy metabolism during subsequent exercise.

Author information

1
Department of Orthopedic Surgery, School of Medicine, University of Tokushima, Kuramoto, Japan.

Abstract

BACKGROUND:

To investigate the effects of specific warm-up at various intensities on energy metabolism during subsequent intense exercise.

METHODS:

EXPERIMENTAL DESIGN:

specific warm-up was consisted of 3 sets of wrist flexions for 5 min, with each set followed by a 3-min rest. The intensity of specific warm-up was set at 20%, 30% or 40% of maximal voluntary contraction (MVC). The subjects then performed a set of wrist flexions at 60% MVC for 4 min as the criterion exercise. For the control experiment, criterion exercise was done without specific warm-up.

PARTICIPANTS:

Five healthy volunteers.

MEASUREMENTS:

using phosphorus-31 magnetic resonance spectroscopy, spectra were obtained from the wrist flexor muscles to determine the ratio of inorganic phosphate to phosphocreatine (Pi/PCr) and intracellular pH.

RESULTS:

The Pi/PCr during the criterion exercise after specific warm-up at any intensity was not significantly different from that without specific warm-up. The intracellular pH during the criterion exercise after specific warm-up at 30% or 40% MVC was significantly higher than that without specific warm-up.

CONCLUSIONS:

These results indicate that mild warm-up exercise could inhibit the development of intracellular acidosis during subsequent intense exercise.

PMID:
11034432
[Indexed for MEDLINE]

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