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Sprint interval training or arms and legs elevates peak VO2 and improves arm exercise economy
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. (Swedish Winter Sports Research Centre)
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. (Swedish Winter Sports Research Centre)
U of Las Palmas de Gran Canaria.
Karolinska Institutet.
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2015 (English)Conference paper, Abstract (Refereed)
Abstract [en]

Introduction

Interval cycle sprint training (SIT) has been shown to improve anaerobic capacity, VO2max and biomarkers of muscle oxidative capacity in as little as 2 weeks in previously untrained adults. The present study was designed to characterize and compare systemic VO2 and exercise performance after SIT engaging the arms and legs.

 

Methods

Sixteen healthy, untrained men (23.9 ± 3.7 yrs; 183.8 ± 6.8 cm; 80.3 ± 14.1 kg) performed six sessions of 4-6x30 sec all-out sprints with the legs then arms (or vice versa) separated by a 1-h recovery over an 11-day period. Limb-specific VO2peak, anaerobic capacity (2x30-sec Wingate tests with 4 min of recovery), a 4-min submaximal work economy test, and a 5-min all-out time trial (TT) were conducted before and after the training program. Muscle biopsies (from the m. vastus lateralis and m. triceps brachii) were taken before and after the training period.

 

Results

VO2peak increased by 10.6% and 5.9% with arm and leg training, respectively (p<0.05), with the increase in the arms significantly greater than in the legs (p=0.02). Work economy was improved for the arms (-9.8%, p<0.05), but not for the legs (-0.9%). Mean power during the TT rose by 13.5% for the arms and 11.8% for the legs (p<0.05). Peak power output and mean power during the two Wingate tests were elevated in both the arms (PPO: 6.7% (p<0.01) and 13.3% (p<0.01); MPO: 6.1% (p<0.01) and 8.4% (p<0.01)) and legs (PPO: 3.1% (p=0.07) and 7.1% (p=0.02); MPO: 3.3% (p<0.01) and 5.6% (p<0.01)). The activity of 3-hydroxyacyl-CoA dehydrogenase (HAD) and levels of muscle glycogen were unchanged in both limbs.

 

Discussion

Sprint interval training with arm or leg cycling exercise increased peak pulmonary VO2 during their respective modes over an 11-day training period with a greater increase in the arms. Sprint performance rose to a similar extent in both extremities, yet work economy was improved only in the arms. These findings suggest some limb-specific responsiveness to SIT training.

Place, publisher, year, edition, pages
2015.
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-26811OAI: oai:DiVA.org:miun-26811DiVA: diva2:890822
Conference
20th annual Congress of the EUROPEAN COLLEGE OF SPORT SCIENCE
Available from: 2016-01-04 Created: 2016-01-04 Last updated: 2016-01-05Bibliographically approved

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