James a young athlete who has won awards for winning cycling competition was jogging on beach when he met a muscular young man, George with impressive 6-packs and firm biceps and other muscles. George, sort of unimpressed by James’ physique challenged him.  They decide to run to a spot about a mile away.  After about a half mile George tires and gives up. Explain why James was able to outrun George despite obviously being less muscular.

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