> My gym actually does that. Do they really tell you how much energy they are harvesting as electricity or do they just tell you how much energy they are dissi

> My gym actually does that. Do they really tell you how much energy they are harvesting as electricity or do they just tell you how much energy they are dissipating as heat? Because it is very common for sports equipment to measure/estimate the power applied by the athlete, in watts, all without the slightest trace of harvesting implied.