This Do-Anywhere, Equipment-Free Workout Works the Entire Body

This is kind of like an advanced Russian twist and another move you can do while you're watching your show or somewhere outside on the go.

"From a seated position (on the couch or floor), lift your legs to tabletop position and hinge back at the waist until torso is at a 45-degree angle to the hips. Keeping your back straight and toes lifted off the floor, place your hands behind your head, and twist shoulders from left to right, squeezing your obliques as you twist."

Muscles targeted: back, abs, and obliques