I Avoid Push-Ups at All Costs — So I Tone My Arms With These Plank Modifications

According to Koegel, plank saws activate your deep core muscles, which requires the entire body to engage and maintain the traditional plank position. If you need to modify this move, feel free to do it from your forearms.

• From your plank position, push forward on the balls of your feet to rock your weight forward into your palms or forearms, then rock back to the starting position.
• For 3-4 rounds, do 20 seconds of work (feel free to add 10 seconds to your work increments for an added challenge!), but always make sure to rest for half of your work time in-between sets.