Effects of jogging/running training on cardiorespiratory fitness, serum lipids, and body composition in healthy males.
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概要
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Associations between alterations in endurance running performance and alterations in cardiorespiratory fitness, body composition, serum lipids, and hematological variables were evaluated in 18 healthy males (age: 28.3±5.5 years, stature: 170.6:±5.1cm, weight: 62.7±6. 3kg). Analyses of the daily training records indicated that the subjects trained 3.4±0.8 d·wk<SUP>-</SUP>l for an average period of 3.8 months and the average jogging/running distance was 3.5±1.2 km·d<SUP>-</SUP>1. The intensity of the training was gradually increased from 60% up to 75% of the pre -training VO<SUB>2</SUB>max. Major effects of the moderate intensity training were significant improvements in VO<SUB>2</SUB>max, VO<SUB>2</SUB>@LT, and 5km run time. In addition, diastolic blood pressure and heart rate (HR) decreased significantly from the pre-training to the post-training, while hemoglobin concentration and mean corpuscular volume increased siguificantly. Both in the pre-training and the post-training, VO<SUB>2</SUB>max and O<SUB>2</SUB>@LT showed a correlation of higher than r=0.7 with 5km run time. When the association between the absolute amount of change (A) in the 5km run time and A in VO<SUB>2</SUB>max or VO<SUB>2</SUB>@LT was evaluated, no significant correlation existed. The relatively close associations of △triglycerides (r=0.665), △HR (r=0.516), and △weight (r=0. 497) with △5km run time observed in the present study need to be clarified in future studies. Increased and/or more efficient lipid utilization or improved cardiac function after a relatively short period of endurance running training in normal men remains only speculative as a critical factor of endurance performance changes.
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