Which of the following effects are associated with the body's adaptations to a training program? Select all that apply.

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With regular endurance training, the same aerobic activity becomes easier. This is in part a result of increased cardiac output efficiency. Stroke volume increases while exercising heart rate decreases. Left ventricle size increases. Increased vascularity around muscle tissues increases the body's ability to deliver oxygen to the tissues. Oxygen extraction also increases as the number of oxidative enzymes and mitochondria increase in the muscle cells. The respiratory capacity improves as the body improves its ability through factors such as enzymes, vasodilation, and increased stroke volume to deliver oxygen to tissues A regular endurance training program will utilize glucose first; however, once these stores are depleted the body will burn more fat.

Which of the Following Effects Are Associated with the Body's