How To: Use a ruler to flatten your lower abs

Use a ruler to flatten your lower abs

This exercise forces you to contract your lower abs so your lower back will stay flat against the floor and...This exercise builds up the lower and upper abs.
Key point: make sure your lower back stays flat against the floor the whole time.

Get the Gadget Hacks Daily

Don't miss any of the cool things your phone can do

Be the First to Comment

Share Your Thoughts

  • Hot
  • Latest