Lunges Lunges work your entire lower body from your lower legs to your glutes. You can modify the move by stepping backwards into a lunge, taking some of the pressure of your knees. Start in a standing position with your right foot in front of your left. Make sure your knees and hips are facing forward. Keeping your shoulders back and your stomach tight, bend your knees as you lower your body down towards the ground. Stop before your left knee hits the floor, and return to starting position. Repeat for 10-15 repetitions, then switch sides. Image Source: POPSUGAR Photography / Rima Brindamou