Not Enough Sets
Are you doing enough sets per exercise per week? It’s easy to just pick a number and stick with it – but what you should be aiming for is 15-20 sets per week (usually between 8-12 reps) for each muscle group.
So when you break that down into your daily workout routines – are you hitting the mark? Try not to hit up a few sets and then call it quits. Make sure that you have goals set up to hit the right numbers – or else you’ll be significantly cutting away from increasing muscle size.