Relationship Between Aerobic Prescription Methods

Study Overview
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Brief Summary
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Current literature report 3 ways to prescribe and control aerobic training. Such models require comparison to determine if they really provide the same impact training in a prescription. The aim of this study is to compare the results of different methods of prescription of aerobic training, ie VO2 workload, heart rate (HR), and load self adjusted by perceived effort (PSE) as well as psychological responses activation, and feel depending on the stimuli offered.

Detailed Description
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36 subjects will undergo two sessions. On the first visit, a maximum aerobic exercise test will be carried on treadmill to determine the maximum oxygen intake and maximum heart rate. Second, the subjects are placed (in a blinded fashion) in 3 situations of moderate effort (60 to 65%) for a total of 5 min and 3 min interval between conditions. In situation 1) will be used to speed regarding the particular metabolic demand from the maximum oxygen intake; In the second situation the reserve of heart rate will be used as reference for prescription aiming to achieve 60-65%; On the last visit will be shown to subjects a perceived effort characterized as moderate and asked to adjust their speed according to the application effort. The final will be recorded each time the FC and the speed and perception of effort that the subject was.

Official Title
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Relationship Between Methods of Aerobic Prescription: Heart Rate vs. VO2 Load vs. Self Selected

Conditions
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Healthy

Intervention / Treatment
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* Other: Prescription for Workload
* Other: Prescription for Heart Rate
* Other: Prescription Self Selected


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 18 at 45 years Risk stratification low Physically active by American College of Sports Medicine criteria Exclusion Criteria: Use of ergogenic resources Use of sympatholytic drugs Use of stimulants

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Prescription for Workload<br>Prescription from 65% VO2max for 5 min of exercise | Other: Prescription for Heart Rate<br>* Prescription from 60 - 65% Maximum Heart Rate for 5 min of exercise<br>* Other names: Heart Rate;Other: Prescription Self Selected<br>* Prescription Self Selected from Perceived exertion at 3 - 4 (moderate) for 5 min of exercise<br>* Other names: Self Selected;|
| Experimental: Prescription for Heart Rate<br>Prescription from 60 - 65% Maximum Heart Rate for 5 min of exercise | Other: Prescription for Workload<br>* Prescription from 65% VO2max for 5 min of exercise<br>* Other names: VO2Max;Other: Prescription Self Selected<br>* Prescription Self Selected from Perceived exertion at 3 - 4 (moderate) for 5 min of exercise<br>* Other names: Self Selected;|
| Experimental: Prescription Self Selected<br>Prescription Self Selected from Perceived exertion at 3 - 4 (moderate) for 5 min of exercise | Other: Prescription for Workload<br>* Prescription from 65% VO2max for 5 min of exercise<br>* Other names: VO2Max;Other: Prescription for Heart Rate<br>* Prescription from 60 - 65% Maximum Heart Rate for 5 min of exercise<br>* Other names: Heart Rate;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Response of Heart Rate and perceived Effort through prescriptions for oxygen uptake |  | Acute Change in 5 minutes of moderate aerobic exercise | 
| Response of Heart Rate through prescriptions for self selected workload based in perceived effort |  | Acute Change in 5 minutes of moderate aerobic exercise | 
| Response of velocity and Perceived Effort through Prescription of Heart Rate |  | Acute Change in 5 minutes of moderate aerobic exercise |