This next boxing move can be lethal, so get ready to channel your inner Mike Tyson.

1. Start in the proper boxing stance, and make sure your knees are nice and relaxed.

2. Drop your right shoulder down, and twist your torso and hips inwards, bringing your forearm and fist across your body to punch straight up. Your palm should be facing your body as you make contact with the bag (or your invisible opponent).

3. Throw right uppercuts for three minutes -- hitting as hard as you can. Follow with a one-minute rest.

4. Now switch sides and throw left uppercuts. The same rules apply, but you'll be punching with your opposite arm. Throw left uppercuts for three minutes, then rest for a minute.

And that was the last set. Feel free to do a lap around the ring to celebrate (after you cool down, of course). You've officially burned some serious calories. Not to mention, you're one step closer to achieving Ronda Rousey-like domination.