Document Detail


The Effects of Incline and Level-Grade High-Intensity Interval Treadmill Training on Running Economy and Muscle Power in Well-Trained Distance Runners.
MedLine Citation:
PMID:  24172721     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
: Despite a paucity of evidence, uphill running has been touted as a sport-specific resistance-to-movement training tactic capable of enhancing metabolic, muscular and neuromuscular processes in distance runners in ways similar to previously established resistance-to-movement training methods such as heavy and/or explosive strength training and plyometric training. Therefore, the purpose of this investigation included documenting the effects of incline and level-grade interval treadmill training on indices of running economy (i.e. oxygen consumption (VO2) and blood lactate (BLa) responses of submaximal running) and muscle power. Thirty-two well-trained distance runners (age, 27.4 ± 3.8 yrs; body mass, 64.8 ± 8.9 kg; height, 173.6 ± 6.4 cm; and VO2Max, 60.9 ± 8.5 mL*min-1*kg-1) received assignment to an uphill (GHill = 12), level-grade (GFlat = 12) or control (GCon = 8) group. GHill and GFlat completed 12 interval and 12 continuous run sessions over 6 weeks while GCon maintained their normal training. Dependent variables measured before and after training were VO2 and blood lactate at two separate velocities associated with lactate threshold (VO2-60% and VO2-80%; and BLa-60% and BLa-80%, respectively); percentage of VO2Max at lactate threshold (%VO2Max@VLT); muscle power as assessed through a horizontal five-jump test (5JMax); and isokinetic knee extension and flexion at three angular velocities (90, 180 and 300°*sec-1). Statistical significance was set to p < 0.05. All groups significantly improved 5JMax, VO2-60%, VO2-80%, BLa-60% and BLa-80%. Additionally, GHill and GFlat significantly improved %VO2Max@VLT. Other indices of running economy and muscle power did not improve. We conclude incline treadmill training effective for improving components of running economy, but insufficient as a resistance-to-movement exercise for enhancing muscle power output.
Authors:
Derek D Ferley; Roy W Osborn; Matthew D Vukovich
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-10-29
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2013-10-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1Department of Physical Medicine and Rehabilitation, Avera McKennan Hospital and University Health, 1601 West 44th Place, Sioux Falls, SD, 57105, phone 605-322-3278 fax 605-322-5191 email: derek.ferley@avera.org or dferley@live.com 2Department of Physical Therapy, The University of South Dakota, 414 East Clark Street, Vermillion, SD, 57069 3Department of Health and Nutritional Sciences, South Dakota State University, Box 2203, Brookings, SD, 57007.
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