dc.contributor.author | Opperman, M.C. | |
dc.contributor.author | Strydom, G.L. | |
dc.contributor.author | Swanepoel, M. | |
dc.contributor.author | Monyeki, M.A. | |
dc.date.accessioned | 2017-05-15T07:22:20Z | |
dc.date.available | 2017-05-15T07:22:20Z | |
dc.date.issued | 2016 | |
dc.identifier.citation | Opperman, M.C. et al. 2016. The effectiveness of training and retraining at various frequencies on the aerobic capacity and intrinsic cardiovascular dynamics (systolic time intervals) in south african employees. African journal for physical activity and health sciences (AJPHES), 22(2:1):407-427. [https://journals.co.za/content/ajpherd1/22/Issue-21/EJC192182] | |
dc.identifier.issn | 2411–6939 | |
dc.identifier.uri | http://hdl.handle.net/10394/23129 | |
dc.identifier.uri | https://journals.co.za/doi/abs/10.10520/EJC192182 | |
dc.description.abstract | Cardiovascular disease (CVD) remains a serious health threat in most countries globally, placing
a severe burden on the workforce in the corporate environment. Physical activity intervention has
already been indicated as an effective regime against CVD. The purpose of this study therefore,
was to examine the effect of training and retraining, following different exercise programme
frequencies on the aerobic capacity, and some intrinsic cardiovascular dynamics (systolic time
intervals) in a cohort of male employees. In this study, 60 employees (28 and 49 years) from an
academic environment were randomly assigned to 3 groups namely; experimental (A and B), and
control (C) groups. Groups A and B trained 3 times/week for 12 weeks, detrained for 12 weeks
and retrained (A=2 times/week and B=4 times/week) for another 12 weeks. Aerobic capacity,
myocardial function (double product) and systolic time intervals were determined at baseline and
at the end of each phase. Experimental groups showed significant improvement in aerobic
capacity (V O2-peak) and myocardial function after 12 weeks of training. Furthermore, the results
showed a significant increase in aerobic capacity for groups A (2 times/week) and B (4
times/week). Systolic time intervals (STIs) namely, Pre-ejection period (PEPc), Left ventricular
ejection time (LVETc) and Intra-ventricular contraction time (IVCT) showed inconsistent
responses during rest, while 30 and 120 seconds during recovery from a standardized workload,
PEPc peak ratio and LVETc peak ratio showed the same tendency as the aerobic capacity. Physical
intervention can improve both the aerobic function and selected cardiovascular dynamics (PEPc
and LVETc). These responses of the STIs were clearer after a standardized physical exercise test
than at rest. Programme frequency remains an important factor, which determines the outcomes | |
dc.language.iso | en | |
dc.publisher | LAM Publications Ltd | |
dc.subject | Training | |
dc.subject | Retraining | |
dc.subject | Aerobic capacity | |
dc.subject | Systolic time intervals | |
dc.title | The effectiveness of training and retraining at various frequencies on the aerobic capacity and intrinsic cardiovascular dynamics (systolic time intervals) in south african employees | |
dc.type | Article | |
dc.contributor.researchID | 12621595 - Monyeki, Makama Andries | |
dc.contributor.researchID | 10313818 - Opperman, Marlene Claudia | |
dc.contributor.researchID | 10172521 - Strydom, Gert Lukas | |
dc.contributor.researchID | 12262404 - Swanepoel, Mariëtte | |