%0 Journal Article
	%A Michael J. Hamlin and  Apiwan Manimmanakorn and  Gavin R. Sandercock and  Jenny J. Ross and  Robert H. Creasy and  John Hellemans
	%D 2011
	%J International Journal of Sport and Health Sciences
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 53, 2011
	%T Heart Rate Variability in Responders and Non- Responders to Live-Moderate, Train-Low Altitude Training
	%U https://publications.waset.org/pdf/9473
	%V 53
	%X The aim of this study was to compare the effects
of an altitude training camp on heart rate variability and
performance in elite triathletes. Ten athletes completed 20 days of live-high, train-low training at 1650m. Athletes
underwent pre and post 800-m swim time trials at sea-level, and two heart rate variability tests at 1650m on the first and
last day of the training camp. Based on their time trial results,
athletes were divided into responders and non-responders. Relative to the non-responders, the responders sympathetic-toparasympathetic
ratio decreased substantially after 20 days of altitude training (-0.68 ± 1.08 and -1.2 ± 0.96, mean ± 90%
confidence interval for supine and standing respectively). In
addition, sympathetic activity while standing was also
substantially lower post-altitude in the responders compared to the non-responders (-1869 ± 4764 ms2). Results indicate that
responders demonstrated a change to more vagal
predominance compared to non-responders.
	%P 810 - 814