Originally Posted by kuan
Today, I did a metric century on my own while rev'ed up on an ECA stack. It felt harder than the last century I did last weekend, due to a headwind on the leg back home and the effects of the stack.
According to my Timex HRM, I averaged 147 BPM for the entire ride, peaked at 172 BPM (my max on the bike is 186 BPM), and burned 3,710 Kcals.
My BMR for my age and weight is about 1,556 Kcals and the only thing I had before the ride was a cup of grape nuts granola cereal in skim milk and a banana--approximately 550 Kcals. During the ride, I had 2 x 24 oz of Gatorade--160 Kcals per bottle. After resting, I had a can of chili, another banana, and a protein drink--830 Kcals.
So, here's what my "energy" day looked like mathematically:
So, according to the above, I'm about 1 pound down for the day, if I have nothing more.
BMR Activity (Kcal) Total (Kcal)
1556 plus 3710 equals 5266
Factor equals 3.4
Food (Kcal) equals 1700
Debt (Kcal) equals 3566 1.02 pounds
Realistically, I'll probably have something else, but it won't be over the 3,566 Kcal debt. I can confidently say that today, my energy expenditures will be greater than my energy intake even if the BMR and Activity calculations are little off.
The reason I'm watching my weight isn't because of a race... no, I'm going on vacation in Cancun. I want to look good im my Speedo.