(Trent Nelson | The Salt Lake Tribune) Tommaso Lenzi and his grad students are developing an exoskeleton or mechanism that wraps around the waist and thigh to assist leg amputees, who expend more energy walking than able-bodied people because of the muscle loss. It's lightweight and a small study found it effective. on Wednesday, Oct. 13, 2021. Brendon Ortolano (red) Marshall Ishmael (red sleeves)