The photos you take in the gym or studio are only for your own preservation or sharing, and it is not illegal. However, if you want to publish or use these photos commercially, you should pay attention to the possible infringement risks. The gym or studio has a clear prohibition on shooting, but you still shoot and publish it publicly without authorization, which may be regarded as a violation of relevant regulations and constitute infringement. Secondly, the photos taken contain portraits or objects of others, and if you don't get their consent or authorization, it may constitute an act of infringing on others' portrait rights or copyright, and you may be investigated for legal responsibility by the other party.