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dc.contributor.authorTjonna, Arnt Eriken
dc.contributor.authorLeinan, Ingeborg Megaarden
dc.contributor.authorBartnes, Anette Thoresenen
dc.contributor.authorJenssen, Bjorn M.en
dc.contributor.authorGibala, Martin J.en
dc.contributor.authorWinett, Richard A.en
dc.contributor.authorWisloff, Ulriken
dc.date.accessioned2018-10-19T14:32:36Zen
dc.date.available2018-10-19T14:32:36Zen
dc.date.issued2013-05-29en
dc.identifier.othere65382en
dc.identifier.urihttp://hdl.handle.net/10919/85429en
dc.description.abstractRegular exercise training improves maximal oxygen uptake (VO2max), but the optimal intensity and volume necessary to obtain maximal benefit remains to be defined. A growing body of evidence suggests that exercise training with low-volume but high-intensity may be a time-efficient means to achieve health benefits. In the present study, we measured changes in VO2max and traditional cardiovascular risk factors after a 10 wk. training protocol that involved three weekly high-intensity interval sessions. One group followed a protocol which consisted of 4×4 min at 90% of maximal heart rate (HRmax) interspersed with 3 min active recovery at 70% HRmax (4-AIT), the other group performed a single bout protocol that consisted of 1×4 min at 90% HRmax (1-AIT). Twenty-six inactive but otherwise healthy overweight men (BMI: 25–30, age: 35–45 y) were randomized to either 1-AIT (n = 11) or 4-AIT (n = 13). After training, VO2max increased by 10% (∼5.0 mL⋅kg−1⋅min−1) and 13% (∼6.5 mL⋅kg−1⋅min−1) after 1-AIT and 4-AIT, respectively (group difference, p = 0.08). Oxygen cost during running at a sub-maximal workload was reduced by 14% and 13% after 1-AIT and 4-AIT, respectively. Systolic blood pressure decreased by 7.1 and 2.6 mmHg after 1-AIT and 4-AIT respectively, while diastolic pressure decreased by 7.7 and 6.1 mmHg (group difference, p = 0.84). Both groups had a similar ∼5% decrease in fasting glucose. Body fat, total cholesterol, LDL-cholesterol, and ox-LDL cholesterol only were significantly reduced after 4-AIT. Our data suggest that a single bout of AIT performed three times per week may be a time-efficient strategy to improve VO2max and reduce blood pressure and fasting glucose in previously inactive but otherwise healthy middle-aged individuals. The 1-AIT type of exercise training may be readily implemented as part of activities of daily living and could easily be translated into programs designed to improve public health.en
dc.format.mimetypeapplication/pdfen
dc.language.isoen_USen
dc.publisherPLOSen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleLow- and High-Volume of Intensive Endurance Training Significantly Improves Maximal Oxygen Uptake after 10-Weeks of Training in Healthy Menen
dc.typeArticle - Refereeden
dc.description.versionPeer Revieweden
dc.contributor.departmentPsychologyen
dc.title.serialPLOS ONEen
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0065382en
dc.identifier.volume8en
dc.identifier.issue5en
dc.type.dcmitypeTexten
dc.identifier.pmid23734250en
dc.identifier.eissn1932-6203en


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