Publication: Long-term swimming in an inescapable stressful environment attenuates the stimulatory effect of endurance swimming on duodenal calcium absorption in rats
1
Issued Date
2011-11-01
Resource Type
ISSN
18806546
Other identifier(s)
2-s2.0-84855997467
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Physiological Sciences. Vol.61, No.6 (2011), 473-486
Suggested Citation
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. Journal of Physiological Sciences. Vol.61, No.6 (2011), 473-486. doi:10.1007/s12576-011-0168-5 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/11442
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Long-term swimming in an inescapable stressful environment attenuates the stimulatory effect of endurance swimming on duodenal calcium absorption in rats
Other Contributor(s)
Abstract
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.