Posted by Dave on August 11, 2011 | 10 Comments
I’m still on vacation, but I thought I’d throw out a quick puzzler for you. For the past two days on my run I’ve completed one of the most grueling miles I’ve ever faced; it includes a 25 percent grade for over 2/3 of a mile, for an 870-foot elevation gain. Here’s the elevation profile of the run:
As you can see, it’s quite dramatic. Yet if you look at the record my GPS trainer (a Garmin Forerunner 305) made of the run and saved on Garmin’s website, it actually indicates I burned fewer calories than I did on any other mile:
On the downhill and flat Miles 1 and 2 it says I burned 152 and 171 calories respectively, but on steep uphill Mile 3, it says I only burned 131. Why? I’ll leave this one for you to puzzle out in the comments. One bit of information that might help: I don’t use a heart rate monitor.