Last weekend, I headed over to the local BMX club at Hayes Hawks to check out the local racing scene. It's fair to say there's a real energetic vibe about the BMX community right now, and lots of talent emerging through the age-groups. Upon watching the racing, it dawned on me how much of a physical sport BMX is, with races lasting between 30 seconds to 1 minute in duration there's a huge demand on the anaerobic glycolysis system (the energy system our body's use when at spri