Well, that explains a lot....
Friday, May 24, 2013
Wore my HRM swimming today.
I'm sure it's not 100% accurate, as the watch does lose the wireless signal during some strokes, or depending how far under water you are, or position in the water.
I swam for almost an hour today & the watch gives me calories burned = 360.
I was pushing myself today, trying to do many of my laps as sprints, and watching the HR to try and get it higher. What feels like I'm working medium hard, to me, effort-wise, is only 125-135 bpm, which is low compared to running/biking/weight lifting/anything else. So that was interesting. My highest heart rate was much lower than it is for Beast Mode class.
To compare, last week I did a swim that I would characterize as "lazy" - I was swimming pretty slow and stopped to stretch a lot because I was sore. I'd guess, based on today's numbers, I was probably around 120bpm or lower for most of it!
Using the SP tracker, and tracking most of my time as "Swimming - general" (I've been using this entry for a while, because the calories burned are lower. If I track all my swim time as "crawl" SP tells me I burn something like 1200 calories and hour, which... I KNOW I am not swimming that hard!) I still get over 400 calories burned for JUST 30 MINUTES.
I have a discrepancy where SP tells me I burn more than twice as many calories as my HRM.
I'm sure they're both off, but I'm going to pick something closer to the HRM numbers and see how it goes.
I think this could explain my plateau, at least a little.
Since January, my exercise has gone up, but so has my calories eaten. My calorie deficit is smaller than it was in December, but not so small that my weight loss should be sitting still.
Until you account for this - divide all my exercise burned calorie bars in half, and my deficit is pretty small. Which would perfectly explain why I'm losing very slowly, if at all.
I've gotten healthier and more... shapely, since January, but I have not been losing at my previous rate (I was averaging ~1.3-1.5 pounds per week, if you averaged 6-8 weeks or so!). Well there you go - not only can you not out exercise a bad diet, but I have not been getting as much out of the exercise as I think.
From now on the HRM is my new 2nd BFF, and getting my calories back down is my most important BFF. That's been going a little better this week, so hopefully I'm on my way again.