4 sets 15 reps?
I've been training for a year by now, but since I had little progress, I decided to pay for a personal trainer. I usually train two muscle groups a day (example chest and biceps), and what confuses me is that I'm asked to do 4 sets of 15 reps per exercise (I usually do 3-4 exercises for muscle group). For each set I increase the weight (or for the first 3 sets I increase the weight and for the 4th one I lower it). Is that good for gaining mass (thats my goal)?
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