Most exercise equipment these days connects to electricity in some way. Making sure that the equipment cannot be started unintentionally is very important. Also, there may be powerful springs or resistance weights that can become dangerous pinch points.
Leaving free weights on the floor can become a trip hazard. All of these suggestions are important for adults, but they are far more important when you have children living in your home. If that’s the case for you, it may also be a good idea to have a separate, lockable room to contain your exercise equipment.