The answer that sounds most correct would be: B) Open back and sufficient tread.
Answer:
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The warm-up period before a workout allows the persons muscles to stretch out, and work up to the more intense workout, without hurting, tearing, or injuring. It increases heart rate, which loosens up joints, and increases blood flow to muscles, all which prevents the person from getting hurt.
Fat cells in the adipose layer under the skin.
