Doping

What about genetic mutations? For instance a human born with a condition that inhibited lactic acid or something or less sensibly 4 working legs?

Surely anything is possible?

Already in effect really-I can remember reading about athletes that had unusual genetic traits like exceptionally low heart rate, huge lung capacity, lactic acid absorbing rates... There's always an element of natural advantage, but it's pretty clear that doping totally distorts this and brings in an aspect of how well you are cheating to enhance this ability.

I'd rather watch a more realistic tour with shorter stages, lower average speed or more rest days but know that the athletes are clean than watch 400km stages that are cycled at 55km/h and take in every peak in the country and have them pumping round on 50% blood to %50 Epo...