(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)(Trent Nelson | The Salt Lake Tribune) Tommaso Lenzi testing an exoskeleton that provides assistance for leg amuptees while walking, at the University of Utah on Wednesday, Oct. 13, 2021.(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)(Trent Nelson | The Salt Lake Tribune) Tommaso Lenzi wearing an exoskeleton that provides assistance for leg amuptees while walking, at the University of Utah on Wednesday, Oct. 13, 2021.(Trent Nelson | The Salt Lake Tribune) Tommaso Lenzi has developed an exoskeleton that provides assistance for leg amuptees while walking, at the University of Utah on Wednesday, Oct. 13, 2021.(Trent Nelson | The Salt Lake Tribune) Tommaso Lenzi wearing an exoskeleton that provides assistance for leg amuptees while walking, at the University of Utah on Wednesday, Oct. 13, 2021.(Trent Nelson | The Salt Lake Tribune) Tommaso Lenzi wearing an exoskeleton that provides assistance for leg amuptees while walking, at the University of Utah on Wednesday, Oct. 13, 2021.(Trent Nelson | The Salt Lake Tribune) Tommaso Lenzi and Marshall Ishmael work on an exoskeleton to assist leg amputees at the University of Utah on Wednesday, Oct. 13, 2021.