Workouts that develop "long, lean" muscles
This trend gets a facelift every couple years, but the basic gist never changes: to get a "long, lean" body (or the latest marketing tool, the "dancer’s body"), you absolutely must lift super-light weights a million times.
Like running, these high-rep, low-weight workouts aren’t necessarily bad. Barre workouts, the Tracy Anderson Method, and even some cycling studios incorporate the tactic into their programs, but Jennifer McAmis, a fitness instructor and personal trainer, explains the problem is with the implication. If light weight-training means a long, toned body, heavy weight-training must mean a bulky body, right?
The type of body you achieve through training relies on many factors, including diet and whether your goal is to develop strength or build mass, and it tends to pigeonhole women into one style of training and men into another. Also, muscle length is fixed. You’re not going to get longer muscles by doing one form of training or another.