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Left Ventricular Adaptation to 12 Weeks of Indoor Cycling at the Gym in Untrained Females.
Linköping University, Department of Medical and Health Sciences, Division of Cardiovascular Medicine. Linköping University, Faculty of Medicine and Health Sciences.
Linköping University, Department of Medical and Health Sciences, Division of Cardiovascular Medicine. Linköping University, Faculty of Medicine and Health Sciences. Department of Clinical Physiology, Jönköping Hospital, Jönköping, Sweden.
Linköping University, Department of Medical and Health Sciences, Division of Cardiovascular Medicine. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Heart and Medicine Center, Department of Thoracic and Vascular Surgery.ORCID iD: 0000-0002-9095-403x
2017 (English)In: International Journal of Sports Medicine, ISSN 0172-4622, E-ISSN 1439-3964, Vol. 38, no 9, 653-658 p.Article in journal (Refereed) Published
Abstract [en]

Cross-sectional studies provide evidence of larger cardiac dimensions and mass in endurance trained than in untrained females. Much less is known regarding adaptations in cardiac function following training in untrained subjects. We aimed to study left ventricular (LV) adaptation to indoor cycling in previously untrained females, in regard of LV dimensions, mass and function. 42 sedentary females were divided into 2 equally sized groups, either training indoor cycling at regular classes at a local gym for 12 weeks, in average 2.6 times per week, or maintaining their sedentary lifestyle. Echocardiography at rest and a maximal exercise test were performed before and after the intervention. Exercise capacity increased in average 16% in the exercise group (p<0.001), together with decreased heart rate at rest (p<0.05) and at 120 watts steady-state (p<0.001). There were no difference in systolic or diastolic function following the intervention and minimal increases in LV internal diameter in diastole (+1 mm, p<0.01). LV mass was unchanged with training (137±25 vs. 137±28 g, p=0.911). Our findings indicate that attending indoor cycling classes at a gym 2-to-3 times per week for 12 weeks is enough to improve exercise capacity, while a higher volume of training is required to elicit cardiac adaptations.

Place, publisher, year, edition, pages
2017. Vol. 38, no 9, 653-658 p.
National Category
Cardiac and Cardiovascular Systems
Identifiers
URN: urn:nbn:se:liu:diva-140006DOI: 10.1055/s-0043-112341PubMedID: 28704880OAI: oai:DiVA.org:liu-140006DiVA: diva2:1136024
Available from: 2017-08-25 Created: 2017-08-25 Last updated: 2017-08-31Bibliographically approved

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Hedman, KristoferBjarnegård, NiclasLänne, Toste
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