Blast through a core workout with your standing bag by adding some boxer sit-ups to your routine.
- Sit on the floor facing your standing bag
- Straddle the base of the bag with your feet and bend your knees in a sit-up position
- Lie back on the floor
- Using your core, lift yourself up in a sit-up
- From your seated position, deliver one strong punch to the bag
- Lay back down and repeat, striking with the alternate arm
- Continue with as many sit-ups as you can, alternating the punching arm each time