It acts as a deterrent to misuse of equipment and as evidence when things do go wrong. A decent CCTV system in a gym will also allow remote viewing, Via the Hik-connect app, just to keep an eye on things as they happen. Of course, CCTV will also record footage of any afterhours visitors and act as a deterrent to intruders. CCTV will not only deter intruders and unwelcome visitors but crucially record and/or alert you to unauthorised activity, after hours.