Spin classes can be a bit intimidating. But for Brit, the fear is real when her first class turns into a ride for her life.

This session covers mass-training to increase muscle size and strength: mass versus quality, strength versus power, and compensatory acceleration.

This session covers workout clothing, straps, wraps, and belts; warm-up and stretching; basic sports-medicine; healing; how to recognize and respond to minor injuries; plus common types of injury and how to prevent them.

Betty tries a regime of exercise, but her weight loss gets out of hand. She sings "Keep Your Girlish Figure".