This High-Volume Interval Training Workout Will Make You Sweaty For the Full 25 Minutes

The Spider-Man push-up variation will really challenge your upper body and work your core, and it targets the muscles on the sides of the torso, too. There's no room for boredom to creep into your workout when doing this push-up!

• Start in a traditional plank position, with your hands under your shoulders and your body in one straight line.
• Bend your elbows out to the side to lower your torso toward the floor. Bring your left knee and touch it to your left elbow.
• As you straighten your arms, return to plank position, bringing your left foot next to your right foot; then repeat this move on the other side. This counts as one rep.