You stopped doing crunches long ago, but if you’re bored with planks, add this sculpting Spidey-inspired move to your workout, which works your entire body, including all sides of your core: Start in a push-up position. Lower your body as if you were doing a push-up and bring your right knee as close to your right elbow as possible. Push back up to start and repeat, this time bringing your left knee to your left elbow. Return to start to complete one repetition. Do 10 total repetitions (five on each leg), switching from right to left leg with every push-up. Source: Renee Balconi, founder of Balconi Top Training in Cincinnati, OH
