Image Source: Andrea Speir
Constantly shifting your weight and balance as you slide the towel forward strengthens the entire arm, as well as the postural muscles and core, big time, Speir explained.
- Come into a plank position and place the hand towel under the left hand.
- Keeping both arms straight, press your left hand forward. Don't go past the point of control — the point where the body can remain in a straight line with the abs engaged.
- Draw the arm back in to the starting position to complete one rep.
- Complete 30 seconds on each side.