>>76810574 (OP)
>Are broad shoulders just genetics?
https://youtu.be/PI4v0RfA708?t=93
no it's also proper muscular build and mobility
for example benching fucks up pecs cause muscle snags on ribcage because of shoulder and humerus positioning (did u know that rib cage is round? yes ribs are round), this malformed and permanetly injured muscle (sternal part doesn't grow and gets injured) will be stiff and pull your shoulders in
the dude on the right is powersharter:
>>76810667