the thing i find about metabolic rates which is silly. is that we want to have a fast metabolism, so we can burn calories faster, but then its like our body become less and less efficient in terms of energy consumption. i was wondering about the effect of fast metabolism on lifespan. generally, with animals the faster their metabolism the shorter their lifespan. but i guess with humans, we get a faster metabolism often with greater fitness, which probably is better for longevity.
Spicy foods are apparently good for raising your metabolism and eating lots of little meals throughout the day, so it has to continuely work and exercise first thing in the morning.
I would interested to find out how to measure my own metabolic rate also.