The effect of repeated bouts of downhill training on running performance and recovery after a 30-km time trial

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dc.contributor.advisorLambert, Michael Ien_ZA
dc.contributor.advisorRogers, Gen_ZA
dc.contributor.advisorLombard, Ren_ZA
dc.contributor.authorSchutte, Lynneen_ZA
dc.date.accessioned2017-12-11T14:14:22Z
dc.date.available2017-12-11T14:14:22Z
dc.date.issued2001en_ZA
dc.description.abstractPurpose: The present study was designed to examine the effect of repeated bouts of either downhill or level running on running performance in, and recovery from, a 30-km time trial. Methods: Sixteen male subjects with a mean (± SD) age of 33.8 ± 5.8 years, body mass of 72.0 ± 7.3 kg and a stature of 176.6 ± 4.5 cm were randomly allocated to either a downhill (n=9) or a level group (n=7). The protocol consisted of a training phase, followed by a 30-km time trial and a recovery phase. During the training phase subjects ran either at a -10% grade (downhill group) or a 0% grade (level group) on a treadmill for nine 40-minute training runs [70% of peak treadmill running speed (PTRS)]. Thereafter all the subjects participated in a 30-km time trial (70% of PTRS), where heart rate (HR), rate of perceived exertion (RPE) and stride length (SL) were recorded, followed by five 15-minute submaximal recovery runs. The first recovery run was performed before the start of the training phase and again on four occasions after the 30-km time trial. HR, RPE, SL, minute ventilation (Vi), oxygen consumption (VO₂), carbon dioxide production (VCO₂) and respiratory exchange ratio (RER) were recorded during these 15-minute runs. Plasma creatine kinase (CK) activity and muscular soreness were assessed for the duration of the study. Results: HR decreased in the downhill group during the training phase, suggesting a HR training effect. Muscle pain and plasma CK activity in the downhill group increased after the first 40-minute downhill training run. These indicators of muscle damage did not show any further increases during the training phase, suggesting a "repeated bout effect". Towards the end of the 30-km time trial the level group, showed a greater heart rate drift (HRD) and an increased RPE, suggesting that they were not able to resist fatigue to the same extent as the downhill group. HR and RPE recorded during the recovery phase suggested that the downhill group showed a better recovery after the 30-km time trial. During the recovery phase the downhill group experienced no increase in muscle pain after performing the 30-km time trial, in contrast to the level group who experienced muscle pain for five days after the 30-km time trial. Plasma CK activity, was blunted after the 30-km time trial in the downhill group in contrast to the level group. Conclusion: The results of the investigation support the hypothesis that the inclusion of downhill training into a training program cause changes, which can be interpreted as enhancing performance during an endurance event and recovery after the event.en_ZA
dc.identifier.apacitationSchutte, L. (2001). <i>The effect of repeated bouts of downhill training on running performance and recovery after a 30-km time trial</i>. (Thesis). University of Cape Town ,Faculty of Health Sciences ,MRC/UCT RU for Exercise and Sport Medicine. Retrieved from http://hdl.handle.net/11427/26545en_ZA
dc.identifier.chicagocitationSchutte, Lynne. <i>"The effect of repeated bouts of downhill training on running performance and recovery after a 30-km time trial."</i> Thesis., University of Cape Town ,Faculty of Health Sciences ,MRC/UCT RU for Exercise and Sport Medicine, 2001. http://hdl.handle.net/11427/26545en_ZA
dc.identifier.citationSchutte, L. 2001. The effect of repeated bouts of downhill training on running performance and recovery after a 30-km time trial. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Schutte, Lynne AB - Purpose: The present study was designed to examine the effect of repeated bouts of either downhill or level running on running performance in, and recovery from, a 30-km time trial. Methods: Sixteen male subjects with a mean (± SD) age of 33.8 ± 5.8 years, body mass of 72.0 ± 7.3 kg and a stature of 176.6 ± 4.5 cm were randomly allocated to either a downhill (n=9) or a level group (n=7). The protocol consisted of a training phase, followed by a 30-km time trial and a recovery phase. During the training phase subjects ran either at a -10% grade (downhill group) or a 0% grade (level group) on a treadmill for nine 40-minute training runs [70% of peak treadmill running speed (PTRS)]. Thereafter all the subjects participated in a 30-km time trial (70% of PTRS), where heart rate (HR), rate of perceived exertion (RPE) and stride length (SL) were recorded, followed by five 15-minute submaximal recovery runs. The first recovery run was performed before the start of the training phase and again on four occasions after the 30-km time trial. HR, RPE, SL, minute ventilation (Vi), oxygen consumption (VO₂), carbon dioxide production (VCO₂) and respiratory exchange ratio (RER) were recorded during these 15-minute runs. Plasma creatine kinase (CK) activity and muscular soreness were assessed for the duration of the study. Results: HR decreased in the downhill group during the training phase, suggesting a HR training effect. Muscle pain and plasma CK activity in the downhill group increased after the first 40-minute downhill training run. These indicators of muscle damage did not show any further increases during the training phase, suggesting a "repeated bout effect". Towards the end of the 30-km time trial the level group, showed a greater heart rate drift (HRD) and an increased RPE, suggesting that they were not able to resist fatigue to the same extent as the downhill group. HR and RPE recorded during the recovery phase suggested that the downhill group showed a better recovery after the 30-km time trial. During the recovery phase the downhill group experienced no increase in muscle pain after performing the 30-km time trial, in contrast to the level group who experienced muscle pain for five days after the 30-km time trial. Plasma CK activity, was blunted after the 30-km time trial in the downhill group in contrast to the level group. Conclusion: The results of the investigation support the hypothesis that the inclusion of downhill training into a training program cause changes, which can be interpreted as enhancing performance during an endurance event and recovery after the event. DA - 2001 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2001 T1 - The effect of repeated bouts of downhill training on running performance and recovery after a 30-km time trial TI - The effect of repeated bouts of downhill training on running performance and recovery after a 30-km time trial UR - http://hdl.handle.net/11427/26545 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/26545
dc.identifier.vancouvercitationSchutte L. The effect of repeated bouts of downhill training on running performance and recovery after a 30-km time trial. [Thesis]. University of Cape Town ,Faculty of Health Sciences ,MRC/UCT RU for Exercise and Sport Medicine, 2001 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/26545en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentMRC/UCT RU for Exercise and Sport Medicineen_ZA
dc.publisher.facultyFaculty of Health Sciencesen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherExercise Scienceen_ZA
dc.titleThe effect of repeated bouts of downhill training on running performance and recovery after a 30-km time trialen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Med)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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