SohoWhat 5th avenue shows can be obtainable in Soho. If that can be done 50 reps on a 20 lb weight, try instead doing 10 reps of 100. Those programs are usually designed for folks of numerous body types, such as Endomorph or Mesomorph.
You're Not getting stronger. This will urge muscle tissue to get the full benefit of the larger weight and cause them to become larger, which is how to gain muscle.