When I was new to strength training, I was nervous about lifting too heavy, fearing I wouldn't be able to complete the exercise and have to drop the weight - with much embarrassment, of course. I now know that it was holding me back from getting stronger, and it must have taken double the time to build half the muscle.
Lifting enough weight (but not too much) is essential in the gym, whether you're doing glute exercises or an upper-body dumbbell workout. It puts pressure on the muscles, breaking down the fibres, which grow and repair to be stronger.
