Not really. The hang clean is a power-based movement that needs to be done with speed and force. The best muscle-building exercises are typically done with a slower tempo and keep the target area engaged for the duration of the set. The hang clean engages the hamstrings, but only for a second or two. The same goes for the quads. If you want bigger thighs, you’re better off performing multiple sets and reps of front squats versus the one rep you do during each hang clean rep. For hamstring growth, stick with Romanian deadlifts or lying leg curls. If your goal is more power or sport-specific success, then the hang clean is your best bet.