Effect of intense interval workouts on running economy using three recovery durations

Abstract

This manuscript has been reproduced from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, sorne thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer.The quality of tbis reproduction is dependent upon tbe quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction.In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will he noted. Also, if unauthorized copyright material had ta he' removed, a note will indieate the deletion.Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beginning at the upper left-hand corner and continuing from left ta right in equai sections with smaII overlaps. Each original is aIso photographed in one exposure and is included in reduced form at the back of the book.Photographs included in the original manuscript have been reprodueed xerographically in tlûs eopy. Higher quality 6" x 9" black and white photographie prints are available for any photographs or illustrations appearing in this copy for an additional charge. Contact lTh1I directly to order. The author bas granted a nonexclusive licence allowing the National Library of Canada to reproduce, loan, distribute or sell copies of this thesis in microform, paper or electronic formats. DMIThe author retains ownership of the copyright in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author' s penmSSlon.L'auteur a accordé une licence non exclusive permettant à la Bibliothèque nationale du Canada de reproduire, prêter, distribuer ou vendre des copies de cette thèse sous la forme de microfiche/film, de reproduction sur papier ou sur format électronique.L'auteur conserve la propriété du droit d'auteur qui protège cette thèse.Ni la thèse ni des extraits substantiels de celle-ci ne doivent être imprimés ou autrement reproduits sans son autorisation. 0-612-29521-4Canad~ ABSTRACTThe purposes of this study were to determine if (1) RE is adversely affected by intense interval bouts of 10 x 400-m, and (2) if there is an interaction effect between RE and recovery duration during the workouts. Twelve highly trained male runners (VO:!max = 72.5 ± 4.3 ml-kg-'min-' ) performed 3 interval workouts of 10 x 400-m with a minimum of 4 days between runs. Recovery between repetitions was randomly assigned at 60, 120or 180 s. The velocity for each 4oo-m run was determined from a treadmill V0 2max test.The average running velocity was 357.9 ± 9.0 mmin-I .

In humans the oxygen uptake slow component is reduced by prior exercise of high as well as low intensity

“…In our study the baseline _ V O 2 in EX-90 did not return to its original level indicating that there was an additional O 2 cost at the start of EX-90. Consistent with the hypothesis of a decrease in mechanical eciency, an increase in _ V O 2 during cycling and running of low and moderate intensity has been observed after prior high-intensity exercise and rests of 5±10 min (Davis and Gass 1981;Zavorsky et al 1998). It can be hypothesised that the increase in the 3rd min _ V O 2 of EX-90 re¯ected the decrease in mechanical eciency, already present during unloaded cycling, and that the expected increase in the end _ V O 2 was oset by the lowering eect on the _ V O 2 slow component with the net result being a not signi®cantly changed end _ V O 2 .…”

The effects of acute whole body vibration as a recovery modality following high-intensity interval training in well-trained, middle-aged runners

“…time trials and/or interval training sessions) in an attempt to maximise training adaptations. High-intensity interval training (HIIT) has been shown to result in acute decreases in running economy, an elevated exercising heart rate and an altered hormonal profile (Vuorimaa et al 1999;Zavorsky et al 1998). Furthermore, in the days following HIIT, leg power is reduced, whilst blood creatine kinase (CK) levels, rating of perceived exertion during constant paced running and symptoms of fatigue have been shown to be elevated (Fry et al 1991;Robson-Ansley et al 2007).…”

The effect of a controlled frequency breath holding training program on running economy among elite college swimmers.

“…[mean = 196 (SD 13), range = 166 to 232 mL/kg/km] (Zavorsky, Montgomery, & Pearsall, 1998). These findings are similar to other research by Morgan et al, who found the variation of RE is about 1.3% (range = 0.3 to 4.4%) in well trained runners (Morgan, Martin, Krahenbuhl, & Baldini, 1991).…”