You may also build muscle and in many cases lose some weight (if that is your target) from the consolation of your own personal home. You can even do crunches with your feet off the floor and knees bent. This system may perhaps hold you from arching your back. Furthermore, https://econopass.com/health-and-fitness/fitness-zone/fitness-effective-workouts/10-effective-exercises-building-lifelong-core-strength-without-planks/