Please answer the following question: Fact 1: Exercise increases a body 's strength. Fact 2: Isometric exercise is a sustained contraction of large muscles, such as weight lifting. Given the two facts above, answer the question "Sustained contraction of large muscles in a body leads to what?" with the following options: - rapid expansion - increased body hair - prolactin release - recovery time from fatigue - increased IRA balance - increased pupil dilation - increased body strength - staying warm
A:
increased body strength