An analysis published by the American Diabetes Association found that GLP-1 weight-loss medications can cause rapid loss of lean muscle mass - up to 10% - comparable to a decade or more of aging.
13 million Americans are currently taking these chemical experimental treatments.
Frailty, metabolic slowdown, and weight regain are among the documented concerns when muscle loss goes unaddressed.
The research is consistent on what slows that loss: progressive resistance training.
The body requires physical resistance to stay strong. The need for that signal doesn't change based on how the weight came off.