- Grasping eight- to 10-pound sledgehammer, squat slightly and cock sledgehammer over right shoulder
- Explosively slam sledgehammer into tire
- Repeat continuously for specified reps
- Switch hands; perform hits from left side
Sets/Reps: 3x10 each side
Durkin: We’re after the core power now. The whole body is working, and it’s tremendous conditioning. That’s a 420-pound tire; it’s a beast. When the hands come down, you want to generate some speed of movement. Stay tight in the core so that your lower back does not get hurt. Fatigue is good; pain is not good. Make sure to hit with the sledgehammer squared up.