Is working out three days a week enough? As cliched as it sounds, consistency really is the key; an adequate amount of it.
To build muscle, strength, and general fitness, you’ve got to do two things: Train enough and recover enough. Get that balance wrong, and your goals whether it is to lift more weight, shed fat, run a 10k, or age more comfortably, will remain out of reach.
If you don’t train frequently enough, you simply won’t produce repeated stimulation. On the flip side, training too hard, too often can be too much.