down and explode into the air, switch legs, and land in the opposite stance. Alternate quickly and jump as high as you can each time. B1) Spiderman Crawl Sets: 6 Reps: 10 Rest: 30 seconds Start in a pushup position. Crawl forward by taking a large step with your right arm and left leg at the same time—get low to the ground and swing your left knee so that it almost touches your right elbow. Alternate sides and keep your body low to the ground. To increase the difficulty, crawl backwards. B2) Spiderman Pushups ...