 | Quick fix: Lift front toes off floor. Shifting weight onto heel will prevent you from pressing down at the base of toes, which targets quads instead, says certified trainer Cindy Whitmarsh, author of Ultra Fit: Challenging Workouts, Amazing Results. |
 | Quick fix: Straighten the leg. It creates more resistance and prevents the hamstrings (back of thigh) from taking over the work from the butt muscles, says John P. Porcari, PhD, exercise and sport science professor at the University of Wisconsin. |
 | Quick fix: Quick fix: Raise foot diagonally. By sweeping leg to the side and back (toes pointing out) instead of straight back, you'll work more glute muscles, says Kurt Murray, an American College of Sports Medicine-certified trainer based in Philadelphia. |
