Good for: Fitness buffs looking to build strength and stamina.
This endurance workout is great for strengthening, slenderizing and creating lean muscles. But be ready for a challenge: It works your arms, legs and core for about 60 minutes. The only equipment you'll need are light weights and a stability ball. Even though the workout is challenging, Tracie provides modifications for most of the moves so you can keep up. If you're new to endurance training, follow the modified version for beginners; more experienced exercisers can try the advanced modification.