Indeed. At a local nuclear power station there's a visitor center where one can experiment how to generate electricity with an exercise bike. With moderate powe

Indeed. At a local nuclear power station there's a visitor center where one can experiment how to generate electricity with an exercise bike. With moderate power you can power a tablet computer or an incandescent light bulb, but the water kettle comes on only with actual athletes, and even then, the small light bulb goes off, and even a professional cyclist can't sustain that power for longer than a brief moment. It's just pointless to generate electricity by human power. It's not pointless to ride a bike.