Bodyweight workouts can be challenging and effective for improving endurance and mental toughness. CrossFit Journal noted in 2006 that simple calisthenic exercises like Chelsea can provide a powerful cardiorespiratory workout. Incorporate these WODs into your training to keep things interesting and work on basic movements like running, burpees, and push-ups. Have fun with these workouts and let us know how they go for you. One example is the Bodyweight WOD by Zachary Tellier, designed to be completed in 30 minutes or less with options for beginners to scale the volume and skill level.