[bostonwalker]

Doping potential aside, this sounds like a very promising area of research. The article mentions increased endurance, peak performance, and anti-aging potential. What are the downsides to having more mitochondria in our cells and why did we evolve to have the levels we currently have?

[mrbluecoat]

> run 50 per cent longer and 50 per cent quicker

Sounds like a candidate for army research to me..