Which of the following is a requirement for completing the hand release pushup?

The requirement that hands must leave the ground during the hand release pushup is essential because this movement is designed to emphasize the entire range of motion in the exercise. In this variation of the pushup, lifting the hands off the ground creates a distinct pause at the bottom position, ensuring that participants engage their muscles fully and activate their core when pushing back up. This requirement also helps to eliminate any reliance on momentum and reinforces proper technique and strength in the upper body.

In contrast, the other options do not align with the key characteristics of the hand release pushup. Having the feet off the ground is not a requirement and can detract from maintaining stability. Locking the elbows is not necessary for the pushup; instead, proper form is achieved by ensuring the elbows are at an appropriate angle during the movement. Additionally, while it is important for the body to generally remain straight during the exercise, the requirement does not explicitly state that the body must be completely flat throughout, since some natural curvature can occur when performed correctly.