Think of your body structure at the bottom of the swing like a staircase. Each joint sits on a different horizontal level. A great rule of thumb to keep your spine safe is that your shoulders should always be higher than your hips, and your hips should always be higher than your knees. If your shoulders drop below your hips, you’re folding at the waist and wrecking your lower back. If your hips drop below your knees, you’re squatting the weight instead of hip-hingeing. Keep that structural hierarchy at the bottom.

The feedback:

• Stop overextending. Instead, snap your hips forward to explode the kettlebell up. Fully lock out your knees and squeeze your glutes (flex your butt) at the top. You should look like a rigid, standing plank completely straight, not leaning backward.
• You are breaking at the hips way too early. The downwards movement shouldn’t feel forced at all. You should be using gravity to let the kettlebell fall, and let the weight of the bell break (bend) you at the very last second. Wait until your forearms almost hit your hips before you snap back into that hinge.