The effect of different work interval durations and work : recovery ratios on oxygen consumption, blood lactate and heart rate during exercise

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dc.contributor.authorPatterson, Carson R. M.en_US
dc.date.accessioned2024-08-15T17:14:09Z
dc.date.available2024-08-15T17:14:09Z
dc.date.copyright1988en_US
dc.date.issued1988
dc.degree.departmentSchool of Physical Education
dc.degree.departmentSchool of Exercise Science, Physical and Health Education
dc.degree.levelMaster of Arts M.A.en
dc.description.abstractThe purpose of this study was to determine and compare the acute effect of varied interval lengths and work:recovery (W:R) ratios on the ability to reach and maintain high aerobic power levels. 8 trained female rowers completed 1 continuous and 7 interval sessions on a Concept II rowing ergometer. The intensity was set at 100% VO2max power output (VO2maxPO) and work was terminated when PO remained below 90% VO2maxPO for 15 seconds(s) . The interval protocols utilized a 1 :0.5 W:R ratio for work intervals of 30 s, 1, 2, and 3 minutes(min) and a 1 :1 W:R ratio for work intervals of 1, 2, and 3 min. Blood samples taken from an antecubital vein after the first 3 min or 4 min of work (RLACTATE) and 2 min post exercise (PELACTATE) were analyzed for plasma lactate. Total Working Time (TWT) was greater (p ~ 0.05) with an interval protocol when compared to continuous exercise and decreased both when work intervals lengthened and when the W:R ratio changed from 1 :1 to 1 :0.5. Time working at VO2max was greatest with 3 min intervals and continuous work. The Average Work VO2 (AVEVO2) was highest in the continuous condition and both 3 min intervals provided the greatest AVEVO2 of the interval sessions. The greatest PELACTATE was observed after the continuous work and in the intermittent sessions the RLACTATE and PELACTATE increased as work intervals were lengthened. RLACTATE and PELACTATE did not differ significantly except that in the 30s:15s and 1 min:1 min intervals RLACTATE was less than PELACTATE. Heart rates at the end of recovery periods were greatest in the 30s:15s session and in the 1 :0.5 W:R protocols when compared to 1 :1 W:R conditions. The continuous exercise and both 3 min interval sessions provided the most time spent at VO2max (TVO2MAX) but the 3min:3min interval design elicited the greatest TWT of these 3 conditions. Therefore, of the protocols studied, the 3min:3min design may be optimal for reaching and maintaining high aerobic power levels when working at 90-100% VO2maxPO. The 1 min:1 min TWT was the greatest of all sessions and would therefore elicit the highest caloric expenditure of the protocols studied
dc.format.extent48 pages
dc.identifier.urihttps://hdl.handle.net/1828/19242
dc.rightsAvailable to the World Wide Weben_US
dc.titleThe effect of different work interval durations and work : recovery ratios on oxygen consumption, blood lactate and heart rate during exerciseen_US
dc.typeThesisen_US

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