how do you harvest kinetic energy?

I need to harvest enough kinetic energy from a person's arm movement whilst running to power a Ipod Nano or Ipod shuffle which runs on about 3.7 Volts- 330mAh?? I have heard the best method is using the coil and magnets but I don't really understand how the friek it works???? Please help me out!

aashilrv6 years ago
use capacitors to store the the electricity.