Go for 12 crunches on one side, then repeat on the other ... Harvard Medical School says that sit-ups are hard on your back because “they push your curved spine against the floor and work ...

The same can be said of long-standing resistance training exercises and bodyweight movements like pull-ups, squats, push ... crunches can work additional muscle groups. "Laying on your side ...

1. Jumping jacks 2. Wall sit 3. Push up 4. Abdominal crunch 5. Step-up onto chair 6. Squat 7. Triceps dip on chair 8. Plank ...

The main difference between sit-ups ... crunches. Types of crunches The list of crunch variations is long, with new types being added all of the time. Boat crunches, penguin crunches, and standing ...

1. Jumping jacks 2. Wall sit 3. Push up 4. Abdominal crunch 5. Step-up onto chair 6. Squat 7. Triceps dip on chair 8. Plank ...