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BACKGROUND: Skeletal muscle mitochondria and capillaries are crucial for aerobic fitness, and suppressed levels are associated with chronic and age-related diseases. Currently, evidence-based exercise training recommendations to enhance these characteristics are limited. It is essential to explore how factors, such as fitness level, age, sex, and disease affect mitochondrial and capillary adaptations to different exercise stimuli. OBJECTIVES: max), muscle fiber cross-sectional area, and fiber type proportion were investigated. METHODS: max, muscle fiber cross-sectional area, and fiber type proportion were extracted from these studies. RESULTS: max in the early stages of training, while ET and HIT showed slower but steady improvements over a greater number of training weeks. CONCLUSIONS: max, this relationship is less clear for capillary adaptations.
Mølmen et al. (Thu,) studied this question.
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