P90X claims to be a high-intensity workout program. While it may be a challenging program, it's not entirely unique. If you're looking for an alternative to the program, there are other options available. Discuss these options with your doctor before starting a new exercise program and choose a workout that fits your needs and abilities.
According to the American Council on Exercise, the workouts in P90X are similar to circuit training. In circuit training you perform weight exercises, moving quickly from one exercise to another. This keeps your heart rate up and adds an element of cardio to your routine. According to Fitness magazine, circuit training burns about 30 percent more calories than traditional weightlifting. In terms of calorie burn, P90X offers similar benefits to running. According to ACE researcher, John Pocori, PhD., the average calorie burn from P90X is similar to running.