Reason No.561 for keeping a strong core: If you can’t keep your core engaged while performing dynamic movements like deadlifts and squats, then your form will deteriorate and you’ll be robbing yourself of strength gains.

The fix, however, is simple: Add more dynamic core exercises, like the slider reach, to your workouts. Proper form when performing the move is essential. Be sure to move your hips and shoulders as a single unit, just as you would with a standard pushup: Think of pulling your rib cage in and down, and your hips under, similar to how you’d use an abs wheel. And try not to use your lats to pull yourself back up—that will disengage your core.

To up the ante, you can lift a foot off the ground to introduce some rotational instability to the move.

Directions:

  1. Get into pushup position with each of your hands on a slider.
  2. Brace your core, then slide one hand out with a straight arm. Simultaneously allow your other elbow to bend (as in a pushup) until your chest is just above the floor.
  3. Return to the top position, and repeat on opposite side.