Dat vroeg ik me dus af nadat ik dik drie uur op het water had gestaan en bijna alles aan mijn lichaam zeer deed
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Toen vond ik dus dit artikel.
Burning Calories With…Kiteboarding?
I’ve always wondered how many calories I burn while doing this. Interestingly, a study was published last year which can give me a rough estimate.
This study looked at the heart rate and oxygen uptake (the amount of oxygen your body is using to produce energy aerobically) of a group of kitesurfers while riding a course designated by a group of buoys. The researchers found that the kitesurfers achieved heart rates of around 80% of their maximum heart rates (the maximum heart rates were determined by a treadmill test). I thought this was interesting because I often have no clue where my heart rate is while I’m riding, and evidently it gets higher than I thought than it would get. Of course, the researchers were simulating kiteboard racing conditions, which is more intense than regular riding, so my heart rate likely does not get that high if I’m just “mowing the lawn” (leisurely riding back and forth) as it’s called. Of course, if I’m actually kiting aggressively (jumping, trying new tricks), then it can get more intense.
The oxygen uptake was estimated to be around 60% of the subjects’ maximal oxygen uptake (again determined by the treadmill test). We can use this number to get a rough estimate of the calories burned. There is a concept called metabolic equivalents (METs), which gives us an idea of how intense an activity is in relation to rest. One MET is equivalent to the oxygen uptake while we’re at rest; this is typically assumed to be 3.5 milliliters of oxygen for every kilogram of body weight, per minute (3.5 ml/kg/min). Thus, an activity that takes 4 METs is one that takes 4 times the oxygen uptake of rest. Vigorous activities can be 10 METs or more.
In this study, the kitesurfers had average oxygen uptakes of 35 to 40 ml/kg/min. If we divide this by 3.5, that gives us 10 to 11 METs. We can use this to estimate the calories burned using the following equation:
Calories Burned Per Minute = METs * 3.5 * (bodyweight in kilograms / 200)
I weigh about 176, which is 80 kilograms. If we assume around 10 METs for kitesurfing, that would give me a calorie burn of:
10 * 3.5 * (80 / 200) = 14 calories per minute
Now, that’s for aggressive racing. I typically will ride for about 2 hours, mixing in aggressive riding with more leisurely riding. Let’s say that I average 7 METs over that 2 hours. That would give me a calorie burn of:
7 * 3.5 * (80/200) = 9.8 calories per minute
9.8 calories per minute * 120 minutes = 1176 calories
Hier kan je de rest van het artikel lezen! 
Rapporteer
of doe je beetje cruisen...