Which exercise is most likely to require the support of a weight belt?

The deadlift with a heavy load is the exercise most likely to require the support of a weight belt because it places significant stress on the lower back and the spinal column. When performing a deadlift, especially at heavier weights, the lifter is at risk for injury due to the mechanics involved, which can involve bending at the hips and lifting a substantial load from a bent-over position.

A weight belt helps stabilize the core and maintains intra-abdominal pressure, which can protect the lower back from injuries such as strains or herniated discs. The added support provided by the belt can enhance performance by allowing the lifter to focus their strength and technique on the movement, providing confidence in their ability to lift heavier weights safely.

In contrast, while squats and the other listed exercises may also involve substantial weight and stress, they typically engage different muscle groups and movement mechanics, where a weight belt may not always be deemed necessary for safety or performance enhancement.