13. Chair dips
Make sure your arms (not your feet) are supporting your weight throughout. Your goal is to complete 3 sets of 15 reps, with a 30-second rest in between reps.
1. Sit in a chair, holding on to the edge with both hands on either side of your thighs, knuckles pointing forward.
2. Bend your elbows 90 degrees and lower your body towards the floor.
3. Straighten your arms, raising your body back to the start position. That’s one rep.