A metabolism-boosting workout that builds strength and tones your abdominals, back, thighs, butt and arms.

11 Exercises That Build Muscle Without Bulk

A metabolism-boosting workout that builds strength and tones your abdominals, back, thighs, butt and arms.

Opposite arm & leg lift

Strengthens: Upper body, lower body, biceps, triceps, shoulders, upper and lower back, glutes

Get down on all fours with hands under shoulders and knees under hips. Reach your right arm forward; at the same time, stretch your left leg back. Hold for 5 seconds, then release and repeat using the left arm and right leg; that's one rep. Do 10 to 15 reps.