Long-term swimming in an inescapable stressful environment attenuates the stimulatory effect of endurance swimming on duodenal calcium absorption in rats
Endurance swimming is known to increase duodenal calcium absorption in normal rats and bone strength in estrogen-deficient rats. Because the stress resulting from forced training often attenuates the stimulatory effect of exercise, swimming in an inescapable chamber should reveal both the positive e...
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th-mahidol.114422018-05-03T14:59:32Z Long-term swimming in an inescapable stressful environment attenuates the stimulatory effect of endurance swimming on duodenal calcium absorption in rats Narattaphol Charoenphandhu Jarinthorn Teerapornpuntakit Sarawut Lapmanee Nitita Dorkkam Nateetip Krishnamra Jantarima Charoenphandhu Mahidol University Faculty of Medicine, Thammasat University Biochemistry, Genetics and Molecular Biology Endurance swimming is known to increase duodenal calcium absorption in normal rats and bone strength in estrogen-deficient rats. Because the stress resulting from forced training often attenuates the stimulatory effect of exercise, swimming in an inescapable chamber should reveal both the positive effect of the exercise and the negative effect of stress. In the work reported herein, swimming rats showed no signs of stress during 2 weeks of training. However, stress response gradually developed thereafter and peaked at weeks 6 and 7. In rats swimming for 2 weeks, transcellular duodenal calcium transport was enhanced ∼ 2-fold. In contrast, calcium absorption was reduced in rats swimming for 8 weeks, consistent with the absence of swimming-induced upregulation of calcium transporter genes in the 8-week group. In conclusion, prolonged stress hindered the stimulatory effect of swimming on duodenal calcium absorption, and thus endurance exercise should be performed without forced training or stress to retain its beneficial effect on calcium metabolism. © The Physiological Society of Japan and Springer 2011. 2018-05-03T07:59:32Z 2018-05-03T07:59:32Z 2011-11-01 Article Journal of Physiological Sciences. Vol.61, No.6 (2011), 473-486 10.1007/s12576-011-0168-5 18806546 2-s2.0-84855997467 https://repository.li.mahidol.ac.th/handle/123456789/11442 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84855997467&origin=inward |
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Biochemistry, Genetics and Molecular Biology Narattaphol Charoenphandhu Jarinthorn Teerapornpuntakit Sarawut Lapmanee Nitita Dorkkam Nateetip Krishnamra Jantarima Charoenphandhu Long-term swimming in an inescapable stressful environment attenuates the stimulatory effect of endurance swimming on duodenal calcium absorption in rats |
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Endurance swimming is known to increase duodenal calcium absorption in normal rats and bone strength in estrogen-deficient rats. Because the stress resulting from forced training often attenuates the stimulatory effect of exercise, swimming in an inescapable chamber should reveal both the positive effect of the exercise and the negative effect of stress. In the work reported herein, swimming rats showed no signs of stress during 2 weeks of training. However, stress response gradually developed thereafter and peaked at weeks 6 and 7. In rats swimming for 2 weeks, transcellular duodenal calcium transport was enhanced ∼ 2-fold. In contrast, calcium absorption was reduced in rats swimming for 8 weeks, consistent with the absence of swimming-induced upregulation of calcium transporter genes in the 8-week group. In conclusion, prolonged stress hindered the stimulatory effect of swimming on duodenal calcium absorption, and thus endurance exercise should be performed without forced training or stress to retain its beneficial effect on calcium metabolism. © The Physiological Society of Japan and Springer 2011. |
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Mahidol University |
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Mahidol University Narattaphol Charoenphandhu Jarinthorn Teerapornpuntakit Sarawut Lapmanee Nitita Dorkkam Nateetip Krishnamra Jantarima Charoenphandhu |
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Narattaphol Charoenphandhu Jarinthorn Teerapornpuntakit Sarawut Lapmanee Nitita Dorkkam Nateetip Krishnamra Jantarima Charoenphandhu |
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Narattaphol Charoenphandhu |
title |
Long-term swimming in an inescapable stressful environment attenuates the stimulatory effect of endurance swimming on duodenal calcium absorption in rats |
title_short |
Long-term swimming in an inescapable stressful environment attenuates the stimulatory effect of endurance swimming on duodenal calcium absorption in rats |
title_full |
Long-term swimming in an inescapable stressful environment attenuates the stimulatory effect of endurance swimming on duodenal calcium absorption in rats |
title_fullStr |
Long-term swimming in an inescapable stressful environment attenuates the stimulatory effect of endurance swimming on duodenal calcium absorption in rats |
title_full_unstemmed |
Long-term swimming in an inescapable stressful environment attenuates the stimulatory effect of endurance swimming on duodenal calcium absorption in rats |
title_sort |
long-term swimming in an inescapable stressful environment attenuates the stimulatory effect of endurance swimming on duodenal calcium absorption in rats |
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2018 |
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https://repository.li.mahidol.ac.th/handle/123456789/11442 |
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1763489819428651008 |