Key result
Endurance-trained runners had significantly elevated calf muscle myoglobin concentration (0.28 vs 0.20 mmol/kg) and shorter creatine rephosphorylation time (34 vs 64 s) compared to sprint runners.
Why the study?
Does endurance training compared to sprint training alter myoglobin concentration, perfusion, and metabolic characteristics in human calf muscles?
Population
Athletes trained long term for either sprint or endurance running
Comparison
Endurance running training vs Sprint running training
Design
Cross-sectional
Authors
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Endurance runners show higher myoglobin and faster rephosphorylation than sprinters; supports oxidative adaptation role but leaves causal effects open.
Observational
Does endurance training compared to sprint training alter myoglobin concentration, perfusion, and metabolic characteristics in human calf muscles?
Absolute Event Rate: 0.28% vs 0.2%
Myoglobin concentration is increased in human muscle with high oxidative capacity and responsive vasculature, supporting its role in oxygen transport in highly oxidative skeletal muscle.
Duteil et al. (2004) reported an observational. Endurance running training vs. Sprint running training was evaluated on Myoglobin concentration ([Mb]). Endurance-trained runners had significantly elevated calf muscle myoglobin concentration (0.28 vs 0.20 mmol/kg) and shorter creatine rephosphorylation time (34 vs 64 s) compared to sprint runners.
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