Tone and tighten your arms, abs, butt, legs -- everything -- in just 15 minutes.
What you'll need: A resistance band ($5, spri.com)
Targets: Abs and outer thighs
- Tie band into a loop and wrap it around thighs, just above knees. Lie faceup on floor with hands behind head, elbows out, legs lifted, and knees bent 90 degrees.
- Crunch up, then circle upper body in a counterclockwise direction while pressing thighs outward against band.
- Do 10 circles, without lowering. Return to start; switch directions and repeat.