Biology, 02.03.2020 17:22, liferoblox666

To improve cardiorespiratory endurance, activities that use most of the large-muscle groups of the body and elevate heart rate should be sustained for at least . a. 40 minutes b. 2 hours c. 1½ hours d. 1 hour e. 20 minutes

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To improve cardiorespiratory endurance, activities that use most of the large-muscle groups of the b...