These six standing exercises strengthen your core, sculpt your waist, and boost posture. No floor work required.

For the obliques you’ll be doing twisting moves, while you hit the abs through a variety of knee tucks, bends, kicks and reaches. Sign up to get the BEST of Tom's Guide direct to your inbox.

Alternate legs. Standing Oblique Crunch: Standing, with hands behind your head or at your temples, bring your elbow towards the opposite knee, contracting the obliques. Alternate sides.

Once you steady yourself and have a good feel for this reverse plank you will add single knee tucks. Proceed to pull one leg up off the floor, bending in the knee and tucking it into the midsection.