Weight lifters spend hours training. They work up to their full capacity and avoid lifting a heavy weight before they're strong enough.

Some also wear a special support belt. Depending on the type of lift, heavy weight lifters don't put the weight down. After lifting the weight and holding it, they let it drop to the ground.

Studies also show that weight lifters have a high intra-abdominal pressure during weight lifting. This means their stomach muscles contract to hold the spine in place. It's a protective measure that seems to work in extreme loading situations.

But even weight lifters can get injured. Fatigue, overload, and sudden weight shifts can lead to injury.