Tone Your Arms and More With This Bodyweight Workout

This plank works the biceps, triceps, and shoulders. Your core kicks into gear too, to help you stable.

• Come into a plank position with your arms and legs straight. Your hands should be underneath your shoulders and your feet hips-width distance apart.
• Keep your torso parallel to the floor, and lower your right forearm to the mat and then the left, coming into elbow plank.
• Then step your right hand back onto the mat, and then the left, pushing yourself back up to plank position. This completes one rep.
• Repeat staring with by putting the left forearm on the mat first.
• Do 12 reps, alternating sides.