Bend your knees to lower down into a split squat. Your left knee should ideally form a 90-degree angle so that your thigh is parallel to the ground, and your right knee is hovering above the floor. (Quick position check: your left foot should be stepped out far enough that you can do this without letting your left knee go past your left toes—if you can't, hop your left foot out a bit farther away from the bench.)
Starting on the hands and knees, keep a flat back and engage the core. Raise the left leg straight back, stopping when the foot is hip-level and the thigh parallel to the floor. Balance for as long as possible, then raise the bottom right toe off the floor, tightening the butt, back, and abs (try to be graceful here!). Hold for up to 10 seconds, then switch legs.
From fortifying your immune system against future cancers to reducing the risk of breast cancer, regular exercise helps protect your body. (12) Although researchers aren’t entirely sure how exercise boosts immunity, theories range from bacteria being flushed out of the body to a reduction in stress-released hormones that might increase the risk of illness. (13)
When she's working out sans equipment, Marraccini's favorite exercises are all things core-related. "A strong core never goes out of style," says Marraccini. This makes sense, considering that having a strong and stable core is essential for both everyday movements as well as exercising. While regular crunches really only target the upper portion of your abdominals, runner's crunches work your entire core as you sit all the way up, including your obliques, lower back, hip flexor muscles, and rectus abdominis (which is what you probably think of when you think "six-pack" muscles).
Protein and fat loss go hand in hand. This nutrient supports muscle growth and raises your metabolism, making it easier to slim down. It also promotes satiety and reduces hunger, so you'll eat less without even realizing it. The American Journal of Clinical Nutrition states that high-protein diets can positively impact appetite, cardiometabolic risk factors, body weight and other factors.