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heart rate at altitude
Hi,
A friend asked me a question, and I was confused by it so I thought I'd throw it out to the group for your input. He and his wife live in Colorado Springs (altitude 7k? or so). They both skate ski with the main race being the American Birkebeiner each year. This year they started watching their heart rates more closely with the aid of a HRM while they've started their early season training. The on-snow training that they do is in Breckenridge (altitude 10k), however, they roller ski both in Colorado Springs and Breckenridge when there is no snow. The have been finding that, even though their roller skiing perceived exertion at the higher altitude in Breckenridge is higher, their threshold heart rate is lower. Doesn't it stand to reason that their heart rates should go up at altitude instead of down at the same perceived exertion due to the lower partial pressure of oxygen? Or do the muscles fatigue out due to the lower oxygen and the heart rate never has a chance to get up to the higher level? Thoughts? Has anyone else experienced something like this? Brian |
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-----BEGIN PGP SIGNED MESSAGE-----
In article , Brian Pauley wrote: Hi, A friend asked me a question, and I was confused by it so I thought I'd throw it out to the group for your input. The on-snow training that they do is in Breckenridge (altitude 10k), however, they roller ski both in Colorado Springs and Breckenridge when there is no snow. The have been finding that, even though their roller skiing perceived exertion at the higher altitude in Breckenridge is higher, their threshold heart rate is lower. Doesn't it stand to reason that their heart rates should go up at altitude instead of down at the same perceived exertion due to the lower partial pressure of oxygen? _ The standard wisdom on heart rate and altitude is that your maximum decreases and your minimum increases with altitude until you reach a point where all you can do is sit still and die from exposure. Or do the muscles fatigue out due to the lower oxygen and the heart rate never has a chance to get up to the higher level? _ Well, you're forgetting the heart is a muscle as well and needs O2. It can't go as fast as it can at lower altitudes. Percieved exertion is also a very fuzzy measuring stick, when it comes to rapid changes in altitude. Thoughts? Has anyone else experienced something like this? _ What they are seeing is exactly what the science and research would expect. My own experience in going from sea level to 8-10K feet in the same day has been all over the place. _ Booker C. Bense -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBQaJAtWTWTAjn5N/lAQFYNwP+JziY0L+EQ1UQLqdxz1MlHfj7PjjbT1pv ZIdafzlU0+eQISVo7SfR40MfwpUkwDPqkwpp/k5aoddyPqWqUN1fAIGw7B6ehkr6 xyEI0QaOJ5T3ZFrxS/bn7EagLqX1JrL/NzJ4yV3NTMu2+iDwruiQ61RuArhUIyHj BVz2PVh39Bw= =OKkT -----END PGP SIGNATURE----- |
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