Lunges Keeping your core engaged and your torso upright, step forward with one leg, and lower down until both knees are bent at about a 90-degree angle. Make sure your front knee is directly above your ankle; you should be able to see your front toes. Your back knee should hover just above the floor. Press your front heel into the floor as you push back up to the starting position. Alternate legs. Image Source: POPSUGAR Photography