Cardiorespiratory Responses to Treadmill Running at Different Slopes

University Hospital, Strasbourg, France8 enrolled

Overview

The purpose of this study is: i) to determine if maximal oxygen uptake in downhill running is significantly different versus flat or uphill running, and ii) to compare cardiorespiratory and muscle fatigue responses to uphill vs flat and downhill running at similar running velocity and similar metabolic power. The investigators hypothesized that maximal oxygen uptake will be lower in downhill running. The investigators also anticipate attenuated cardiorespiratory and muscle fatigue responses to downhill running when compared to flat or uphill running performed at similar velocity but not when the comparison is done at similar metabolic power.

Study Type

INTERVENTIONAL

Allocation

Purpose

HEALTH_SERVICES_RESEARCH

Masking

NONE

Enrollment

Conditions

Cardiorespiratory Responses Well-trained Athletes

Interventions

Part 1: Maximal incremental tests will require running at fixed slopes (+15%, 0% -15%) for stages (2min duration) of increasing velocities (0.5, 1 and 1.5 km/h) Part two: submaximal running tests will require running at constant velocity (80% VO2max uphill; 80%VO2max downhill and downhill at similar velocity as uphill)

Eligibility

Sex: MALEMin age: 18 YearsMax age: 60 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * to be a well-trained runner with a VO2max \> à 55 ml/kg/min * nonsmoker or stopped smoking for 5 years * BMI \< 25 * affiliation to the social health insurance scheme * signing an informed consent form. Exclusion criteria: * impossibility to give the subject enlightened information (subject in emergency situation, difficulties in understanding the study, ...); * subject under the protection of justice * subject under guardianship or curatorship * contraindication to the practice of physical and sport activities * lower limbs musculotendinous or articular problems * respiratory, cardiovascular or metabolic pathology * drug treatment in progress and impossibility to stop it within 7 days before the beginning of the study

Cardiorespiratory Responses to Treadmill Running at Different Slopes

Overview

Conditions

Interventions

Eligibility

Locations (1)

Outcomes

Primary Outcomes