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There are 3 ways to build muscle, heavy weights (you tried this) constant tension and volume. You now have to try the others. Switch from 3 days a week to 3 on 1 off and focus on constant tension. That will probably means about 8-12 reps with controlled motion. You should keep a heavy set in your workout in order to maintain your strength.
You will have to pay close attention to recovery and supplementation because the extra volume will be very hard on your body.
In summary, warmup, 1 heavy set and 2-3 constant tension sets per exercise, do push, pull, legs, 3 on 1 off.
Stu
There are 3 ways to build muscle, heavy weights (you tried this) constant tension and volume. You now have to try the others. Switch from 3 days a week to 3 on 1 off and focus on constant tension. That will probably means about 8-12 reps with controlled motion. You should keep a heavy set in your workout in order to maintain your strength.
You will have to pay close attention to recovery and supplementation because the extra volume will be very hard on your body.
In summary, warmup, 1 heavy set and 2-3 constant tension sets per exercise, do push, pull, legs, 3 on 1 off.
Stu