Die uitwerking van ’n intensiewe afrigtingsprogram op die kardiostresindeks

Translated title of the contribution: Influence of intense training program on the cardio stress index

Peet Du Toit, Alan St. Clair Gibson, Paola Wood, Catherina Grant, Kristopher Grimes, Avinash Tope, Christa Janse van Rensburg, Johannes van Rooyen, Andrew Mckune, Evangeline Nortje, Lizelle Fletcher, Ronel Ferreira, Annie Joubert, Andre Stander

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Abstract

Influence of intense training program on cardio stress index. Armed service recruits are faced with many stressors, including a strenuous training regimen that may have an impact on their physiological functioning. The Cardio Stress Index (CSI) is a noninvasive marker of the stress that the heart is experiencing. The aim of the study was to test the physiological impact of 20 weeks of
intense training of armed service recruits, using CSI as a noninvasive biomarker of cardiac stress. Armed service recruits are faced with many stressors, including a strenuous training regimen that may have an impact on their physiological functioning. The CSI is a noninvasive marker of the stress that the heart is experiencing. The calculation of the CSI is based on the duration of vascular
excitation (QRS duration), heart rate, heart rhythm and standard deviation of the duration of time between each successive cardiac cycle (RR-interval). The aim of the present study was to test the physiological impact of 20 weeks of strenuous training of armed service recruits, using CSI as a noninvasive biomarker of cardiac stress. Experiments were conducted at three points in time (weeks
1, 12, 20) during the basic military training of armed service recruits (n = 202, males = 115, females = 87), aged between 18 and 24 years. Variables measured include: Resting CSI, heart rate and blood pressure. Data analysis was performed, using paired t-tests for pairwise comparisons of week 1 (baseline) with week 12; week 12 with week 20; and week 1 with week 20. The average CSI and heart
rate remained within normal values for male participants on all three testing occasions. However, baseline readings for females were significantly higher during week 1. There was an overall decrease in the CSI in the 20 week time frame. From this study it seems as if the CSI measurement is a noninvasive method to establish the effects of training on the health of the heart.
Translated title of the contributionInfluence of intense training program on the cardio stress index
Original languageUndefined
Pages (from-to)1-6
Number of pages6
JournalSouth African Journal of Science and Technology
Volume33
Issue number1
DOIs
Publication statusPublished - 2014
Externally publishedYes

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