This man grew half an inch from chin-ups in one month

[Nattybro87]

https://m.youtube.com/watch?v=NWtBLVDiBpU

This guy grew half an inch after doing simple chin-up exercises in 30 days. That’s a very fast growth to me. It usually took me about half an inch after multiple different arm exercises for about 20 weeks. Is he natty? Not dissing him or anything, but just wonder if that growth speed is attainable naturally.

[TheNaturallyEnhancedTruth]

https://m.youtube.com/watch?v=NWtBLVDiBpU

This guy grew half an inch after doing simple chin-up exercises in 30 days. That’s a very fast growth to me. It usually took me about half an inch after multiple different arm exercises for about 20 weeks. Is he natty? Not dissing him or anything, but just wonder if that growth speed is attainable naturally.

Was he already lifting consistently prior?  If not, 1/2 inch after going from 3 -> 32 pull-ups is probably normal... you probably also have to consider he took the measurement after doing them (the pump!).  Not seeing anything crazy here.

[Richard]

Perfectly reasonable. No reason to suspect he isn't natural.