Nic., you are not getting the whole idea. When any one sign up to join a gym, they give a statement that they have no known health problems and they will verify with a specialist doctor to assess the health status. Gym is a common facility for which you pay a fee.

There is always risk associated with any sports. You are supposed to know how to use the facility (like weightlifting) and agree to take all risks while joining. The instructors (or free help) comes as a courtesy only and not mandatory.

A gym is not a workplace and health and safety issues are only applicable to the safety of equipment and cleanliness of place. Any gym will not take the responsibility for accidents caused by individual’s unawareness, misuse or failure. Helping an individual is only a humanitarian need. Gym cannot be penalized for an individual’s death since he took part in that sport willingly assessing all risks associated with it. It is sad that a person died of heart attack. However I don't get the point that how the Gym will be responsible for his heart failure and why they shall be penalized? I will definitely agree if this was caused due to failure of any equipment or if he was forced in to this. For the first aid, no one is sure and shall be investigated