A standing core workout can engage the abs without requiring equipment — not even a mat. These moves will firm up the ...
Lift your feet off the floor slowly until they're parallel to your shins. For balance, place a yoga block on your shins.
A trainer outlines how to perform five of his best strength workouts to fire up your core and build six-pack abs.
And it looks like trainer Kayla Itsines shares this belief. The trainer and founder of workout app Sweat recently highlighted ...