The lower back (erector spinae), glutes, and hamstrings all play a role in hip extension and core stabilization. Lack of stabilization and strength of the lower back and hips increases movement of the spine to compensate, often resulting in excessive lumbar extension to counter poor hip extension and core stabilization. When performing these exercises, coaches and athletes need to be aware of lumbar extension masking poor hips and glute strength, often the case with many athletes, which can result in lower back injury during extensions, squats, pulls, and human locomotion.
Perhaps the type of shoes worn by Olympic weightlifters is their most distinctive piece of equipment. Weightlifting shoes are typically designed with a raised heel of " to " and one or two metatarsal straps that tighten across the instep of the shoe. The raised heel helps the lifter maintain an upright torso while catching the bar and also allows for a deeper squat under the bar. The soles of the shoes are also quite rigid, helping to resist compression while under heavy loads. The shoes are designed for maximum stability while remaining flexible in the "toebox". This allows the lifter to come up on the toes and to catch the weight on the ball of the back foot during the "jerk" movement of the lift.