Human Power | Muscle Power Becomes Electricity!

About one or two weeks ago, I was reading about natural resources that can be converted into electricity, like water(turbine), wind(windmill) etc..... I wondered whether humans could generate electricity. I decided to ask my mother. She said "It will be very hard as somebody has to keep generating electricity all the time." I asked nothing more on that topic for many days. Today, I was reading about Trevor Baylis, a famous scientist, in my elder sister's science book. I decided to research about him and his invention of clockwork radio(the radio that works when a handle on the back is spun - a technique that is now used in torches). According to wikipedia, he was known to have invented human power. I was very curious and decided to search about human power. I found out that it was the same thing that I had thought of two weeks ago. Trevor Baylis has found a way to convert muscle power into electricity, just like in the clockwork radio!

 Then I thought,  can we using human power  to generate electricity for daily life? I then came across this blog post. The post's topic is 'Could we run modern society on human power alone?' It explains why we should use human power and how to motivate the use of human power. Then I found out that there is something called a Human Power Plant. It's manned by a group of people who convert their muscle energy into electricity. 

But there is a downside. People who go to the plant will have to spend a lot of their time generating electricity, much more time consuming than fossil fuel. Very few people would like to give so much of their time producing electricity. Clearly, fossil fuel is more convenient.

Then I had an idea. Me and my friends play outdoors for two hours everyday. We spend a lot of energy, especially in running. What if we could design shoes in such a way that the shoes absorb all the energy that we spend and convert it into potential energy, storing it. Then, when we come back home and place our shoes in a specially designed shoe rack, the shoe rack will extract the potential energy from the shoes, convert them kinetic energy, that energy can the be used as electricity. That way, we will still be spending two hours, but it'll be the same two hours that we spend everyday playing, and it won't be boring! The same thing can be applied to people who have running as their hobby as adults don't play!