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Prolonged Sitting Interrupted by 6-Min of High-Intensity Exercise: Circulatory, Metabolic, Hormonal, Thermal, Cognitive, and Perceptual Responses
University of Würzburg.
Artevelde University College Ghent, Ghent, Belgium.
Department of Sport, University of Applied Sciences for Police and Administration of Hesse, Wiesbaden, Germany.
Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden.ORCID iD: 0000-0002-3814-6246
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2018 (English)In: Frontiers in Physiology, ISSN 1664-042X, E-ISSN 1664-042X, Vol. 9, article id 1279Article in journal (Refereed) Published
Abstract [en]

The aim was to examine certain aspects of circulatory, metabolic, hormonal,

thermoregulatory, cognitive, and perceptual responses while sitting following a brief

session of high-intensity interval exercise. Twelve students (five men; age, 22

2 years) performed two trials involving either simply sitting for 180 min (SIT) or sitting for this same period with a 6-min session of high-intensity exercise after 60 min (SIT CHIIT).

At T0 (after 30 min of resting), T1 (after a 20-min breakfast), T2 (after sitting for 1 h),

T3 (immediately after the HIIT), T4, T5, T6, and T7 (30, 60, 90, and 120 min after

the HIIT), circulatory, metabolic, hormonal, thermoregulatory, cognitive, and perceptual

responses were assessed. The blood lactate concentration (at T3–T5), heart rate (at

T3–T6), oxygen uptake (at T3–T7), respiratory exchange ratio, and sensations of heat

(T3–T5), sweating (T3, T4) and odor (T3), as well as perception of vigor (T3–T6), were

higher and the respiratory exchange ratio (T4–T7) and mean body and skin temperatures

(T3) lower in the SITCHIIT than the SIT trial. Levels of blood glucose and salivary cortisol,

cerebral oxygenation, and feelings of anxiety/depression, fatigue or hostility, as well as

the variables of cognitive function assessed by the Stroop test did not differ between

SIT and SITCHIIT. In conclusion, interruption of prolonged sitting with a 6-min session

of HIIT induced more pronounced circulatory and metabolic responses and improved

certain aspects of perception, without affecting selected hormonal, thermoregulatory or

cognitive functions.

Place, publisher, year, edition, pages
2018. Vol. 9, article id 1279
Keywords [en]
inactivity, high-intensity interval training, sedentary lifestyle, students, workplace, intervention
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-35353DOI: 10.3389/fphys.2018.01279OAI: oai:DiVA.org:miun-35353DiVA, id: diva2:1273714
Available from: 2018-12-21 Created: 2018-12-21 Last updated: 2019-01-10Bibliographically approved

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Holmberg, Hans-Christer

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