The Night Workout Guaranteed to Knock You Out and Build a Better Body

We know, we know: sit-ups and crunches are so yesterday. It's true, but this variation is definitely one to include in your workouts. If you think you'll just bounce through this one without much effort, think again.

• Lie on your back and open your legs into a diamond shape with the soles of your feet pressed together.
• Put your hands together with your arms overhead.
• Exhale as you lift your back and arms up with power, then touch the ground in front of your feet.
• Lower back to the starting position with control.