Bike riding back to work today I put on Iggy Pop's 'Lust for Life', and suddenly my legs felt spring loaded with burning coals and liquid nitrogen. Music blasting, I wheeled and span my way through traffic, roughly leaping over curbs, tearing down sidewalks, sliding through traffic and just enjoying the sheer vigor of pumping hard on my pedals and moving fast. It felt good. It felt terrific, and while I'm now sitting here at my desk covered in a sheen of sweat with my thigh muscles twitching and breath coming in deep, slow inhalations, I'm suddenly supremely aware of why I blog about health and fitness, why I research vitamins and nutrients, why I care about what I eat and how I exercise and the whole complex multifarious never ending shebang that is this job I have.