I remember the first time I rode a bike for 30 miles, I couldn't even sit down without intense cramping. I ate an entire large pizza loaded with toppings. With

I remember the first time I rode a bike for 30 miles, I couldn't even sit down without intense cramping. I ate an entire large pizza loaded with toppings. Within a year, I rode a bike across the US. The body adapts to the load it's given, provided enough time.