> <i>30 minute average output (back when I was in shape) 150 Watts</i><p>So in Australia, electricity is relatively expensive at around 30 cents per kWh. This means 150 Watts for 30mins is worth 30c * 0.5hr * 0.150kW = 2.25 cents... for 30mins of vigorous exercise...<p>The reality is electricity is incredibly cheap to buy in most countries and human powered generation is completely infeasible for practical use...<p>[1] <a href="https://www.canstarblue.com.au/electricity/electricity-costs-kwh/" rel="nofollow">https://www.canstarblue.com.au/electricity/electricity-costs...</a>