Super intense, high-impact aerobic workouts and training sessions are all the rage at the moment, but they aren't for everybody. Aerobic capacity decreases with age, and combined with lower joint and muscle flexibility, fast-paced workouts that involve lots of jumping around can make you more prone to injury. Swap out the intense boot camps for a slower-paced, thorough workout that lets you move through your whole range of motion without stressing your joints. You'll thank us later!