Could not agree more. Although you will find, as you take exercise slightly more seriously, you tend to want to eat the right balance of foods (on the upside, you can also eat more of the good stuff - eg a nice big bowl of pasta after some training).

I have worked at home for quite a few years, daily exercise is now routine (I actually look forward to it). Difference to energy level, and general appearance is amazing.

The bottom line is our bodies are built for really hard physical work. They need it, at least a bit every few days.