Sounds like the plank is the winner, her research showed that
forearm planks active twice the average muscle activity in the rectus abdominus, and external oblique's than a traditional crunch.
Not exact matches
Forearm plank: For an active rest that continues to keep your heart rate up, hold a forearm plank for one
Forearm plank: For an
active rest that continues to keep your heart rate up, hold a
forearm plank for one
forearm plank for one minute.