To slow down the climate catastrophe, we need more green electricity, there are no two opinions. Wind power plays a significant role. Photovoltaics is becoming more and more effective and important, especially in private households, significant savings can be achieved. But what about kinetic energy, that is, energy of motion? If we can generate electricity for our lights when we ride our bikes, can’t we do the same when we spin at the fitness center? We have researched – and were surprised by the result itself.