The edition allows you to see exercises and actions from a completely new point of view. This one-of-a-kind Brian Sharkey guide takes you inside each activity to show you what works, what doesn't, and why! You'll look beyond the basics to see how your body changes as activity increases. Fitness Illustrated allows you to see exercise and activity from a whole new perspective. In this one-of-a-kind guide, author Brian Sharkey takes you inside each type of activity to show you what works, what doesn’t, and why! You’ll go beyond the basics to see how your body changes with increased activity. From how muscles gain size and strength to the effect of aerobic activity on heart and lung function, this is fitness as you have never seen it before.