Pedal Rate Influence on Oxygen Consumption in Eccentric
NCT ID: NCT02594657
Last Updated: 2016-07-29
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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UNKNOWN
NA
15 participants
INTERVENTIONAL
2015-08-31
2016-10-31
Brief Summary
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With this type of ergometer, O2 consumption (VO2) is three to five fold lower than during an exercise realised at the same power output with a concentric ergocycle. Due to this later propertie, which origins are not yet fully identified, there is an increasing interest to embed ECC in rehabilitation programs.
The investigators hypothesis that a higher pedal rate will induce a lower oxygen consumption, with the same benefits.
This study aims to compare oxygen consumption at two pedal rates : 50 and 80 rotation per minute (rpm).
The ultimate goal is to assess efficacy and tolerance of eccentric training on ergocycle and to enhance comprehension of the physiological mecanisms involved in the lower O2 consumption observed.
Detailed Description
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Fifteen healthy volunteers realize a incremental test until exertion on a concentric ergometer. If the minimal power output of 200W is reached, the volunteers are familiarized with eccentric exercise during several bouts of exercise. This habituation session allows avoiding the secondary muscular effects of high intensity eccentric exercise.
Then, volunteers could take part in a two-stepped eccentric protocol: 1) an incremental test consisting in 3 stages. Each stage lasts 4 minutes.
2\) A constant-load test realized at 320W during 6 minutes. Each test is realized twice: at 50 and 80 rpm and sequence is randomly assigned.
\[One step (incremental or constant load) = two tests (50 and 80 rpm)\]
During each step, oxygen consumption is continuously measured, as well as cardiac output and muscular activity and intramuscular oxygen kinetic.
Conditions
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Keywords
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Study Design
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RANDOMIZED
SINGLE_GROUP
NONE
Study Groups
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pedal rate ON 50 RPM
pedal rate on 50 RPM
All measurements are performed in two pedalling situations. The two frequencies used will be 50 and 80 RPM. For each subject the running order (50 and 80, 80 and 50) is randomly determined
pedal rate on 80 RPM
pedal rate on 80 RPM
All measurements are performed in two pedalling situations. The two frequencies used will be 50 and 80 RPM. For each subject the running order (50 and 80, 80 and 50) is randomly determined
Interventions
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pedal rate on 50 RPM
All measurements are performed in two pedalling situations. The two frequencies used will be 50 and 80 RPM. For each subject the running order (50 and 80, 80 and 50) is randomly determined
pedal rate on 80 RPM
All measurements are performed in two pedalling situations. The two frequencies used will be 50 and 80 RPM. For each subject the running order (50 and 80, 80 and 50) is randomly determined
Eligibility Criteria
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Inclusion Criteria
* IMC \<30
* physically active
* Pmax concentric \> 200W
* Pmax \> Pmax théo sédentaire
Exclusion Criteria
* Eccentric based physical activities or sports (weight liftering, alpine skiing)
18 Years
55 Years
MALE
Yes
Sponsors
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University Hospital, Clermont-Ferrand
OTHER
Responsible Party
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Locations
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CHU Clermont-Ferrand
Clermont-Ferrand, , France
Countries
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Central Contacts
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Facility Contacts
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Patrick LACARIN
Role: primary
Other Identifiers
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CHU-0241
Identifier Type: -
Identifier Source: org_study_id