Piezoelectric Energy Harvesting (PEH) Product Survey

As part of the Idea Incubator Challenge 2015 I would like to build a prototype of a PEH module that harvests energy from a chest crunch machine in a gym which can be used as a power bank to charge one's mobile phone/other small electronic devices.
(PEH is a sustainable technology that converts mechanical energy to electrical energy)
1.What’s your first reaction to this new product idea?
2.How well, if at all, does the word “INNOVATIVE” describe this new product?
3.How often do you use gym equipment? (Choose the closest answer)