Journal article
Effects of endurance training on intracellular calcium concentration in T lymphocytes
European Journal of Applied Physiology, Vol.98(3), pp.242-249
2006
Abstract
The purpose of the present study was to determine whether 12 months of endurance training reduced [Ca2+]i in T helper (CD4+) lymphocytes in trained (TR) men compared to untrained (UT). Fourteen trained (Ironman triathletes) and nine untrained (sedentary) men volunteered for the study. The TR group averaged 12 km of swimming, 300 km of cycling and 60 km of running per week during the year. Resting blood samples were taken from TR (VO2peak 64±2 ml kg-1 min-1) and UT (VO2peak 42±2 ml kg-1 min-1) subjects every 4 weeks for 52 weeks (October 1, 1999-October 1, 2000). Leukocyte concentration was measured using a full blood count. Unstimulated CD4+ lymphocytes were separated and analysed for changes in free ([Ca2+]i) and total ([Ca2+]t) calcium using flow cytometry. There were no significant differences in leukocyte concentration between UT and TR groups. There were significant differences between TR and UT in [Ca2+]i (October B and November), and [Ca2+]t (January and March). There were also significant sequential monthly changes in both [Ca2+]i and [Ca2+]t for TR and UT groups during the study. Significant increases in [Ca2+]i and [Ca2+]t during summer (January and March) for both TR and UT groups suggest an increase in intracellular signalling during hot weather. [Ca2+]i and [Ca2+]t were significantly lower in TR lymphocytes during November and March, suggesting that endurance training during warmer months may decrease [Ca2+]i through altered intracellular signalling, possibly to maintain lymphocyte function during heat stress.
Details
- Title
- Effects of endurance training on intracellular calcium concentration in T lymphocytes
- Authors
- Suzanne Broadbent (Author) - Massey University, New ZealandGregory Gass (Author) - Griffith University
- Publication details
- European Journal of Applied Physiology, Vol.98(3), pp.242-249
- Publisher
- Springer
- Date published
- 2006
- DOI
- 10.1007/s00421-006-0268-8
- ISSN
- 1439-6319
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health - Sports & Exercise Science; School of Health and Behavioural Sciences - Legacy
- Language
- English
- Record Identifier
- 99450542002621
- Output Type
- Journal article
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