Sleep Deprivation : Effects on Driving Performance and Central Fatigue

NCT ID: NCT01606020

Last Updated: 2012-08-22

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 12 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2011-09-30
• Study Completion Date: 2012-07-31

Brief Summary

The effects of sleep deprivation (SD) on performance, while contradictory at first glance, are in reality rather clear when exercise duration is considered, i.e. intense/supramaximal versus prolonged exercises. This latter type of exercise leads to the most important performance decrements after SD.

Detailed Description

The effects of sleep deprivation (SD) on performance, while contradictory at first glance, are in reality rather clear when exercise duration is considered, i.e. intense/supramaximal vs. prolonged exercises. This latter type of exercise leads to the most important performance decrements after SD. However, the causes of this accentuated fatigability in endurance exercise with sleep deficit are not known. Several hypotheses have been proposed such as lower pH before exercise, lower ventilation due to depreciated response to hypercapnia/hypoxia, or haemodilution. Yet the most plausible explanation is a lower tolerance to prolonged exercise because SD increases the rate of perceived exertion. Another potential effect of SD is an alteration of central command during exercise. The literature is rather scarce on this topic and is only based on a few animal studies. In humans, no effect of SD on maximal strength has been reported so that maximal voluntary activation should in theory not be altered. Transcranial Magnetic Stimulation (TMS), that allows to induce a motor response from its cortical origin (and to measure the resulting contraction), is a promising tool to explore neuromuscular function. TMS has been used only in three studies after SD, none of them involving exercise and none of them measuring mechanical responses (i.e. only EMG responses, such as motor evoked potential, were measured). In addition, the results of these three studies are contradictory. The effects of SD on central fatigue (i.e. increase of the activation deficit during exercise) have never been investigated. The goal of this experiment is thus to test the hypothesis that an increase in central fatigue (at supraspinal level) in SD can participate to performance alteration during a prolonged exercise. For that purpose, measurements of neuromuscular function particularly dedicated to assess central fatigue will be performed before and after SD but also when combining SD and a fatiguing exercise conducted until exhaustion.

Conditions

Healthy Volunteers

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: BASIC_SCIENCE
• Blinding Strategy: NONE

Study Groups

Sleep deprivation First

First night D7 :

Overnight, the subjects stay in their homes (reading, watching TV, playing cards). Two experimenters will take turns to never leave them alone and avoid any micro-sleep.

Second night D28 :

Overnight, the subjects stay in their homes. No intervention during this night.

Group Type: ACTIVE_COMPARATOR

sleep deprivation

Intervention Type: OTHER

Overnight, the subjects stay in their homes (reading, watching TV, playing cards). Two experimenters will take turns to never leave them alone and avoid any micro-sleep.

No intervention

Intervention Type: OTHER

Overnight, the subjects stay in their homes. No intervention during this night

sleep deprivation second

First night D7 :

Overnight, the subjects stay in their homes. No intervention during this night.

Second night D28 :

Overnight, the subjects stay in their homes (reading, watching TV, playing cards). Two experimenters will take turns to never leave them alone and avoid any micro-sleep.

Group Type: ACTIVE_COMPARATOR

sleep deprivation

Intervention Type: OTHER

Overnight, the subjects stay in their homes (reading, watching TV, playing cards). Two experimenters will take turns to never leave them alone and avoid any micro-sleep.

No intervention

Intervention Type: OTHER

Overnight, the subjects stay in their homes. No intervention during this night

Interventions

sleep deprivation

Overnight, the subjects stay in their homes (reading, watching TV, playing cards). Two experimenters will take turns to never leave them alone and avoid any micro-sleep.

Intervention Type: OTHER

No intervention

Overnight, the subjects stay in their homes. No intervention during this night

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• no smoking and drugs
• regular physical activity

Exclusion Criteria

• insufficiency cardiac or respiratory
• carrying a cardiac pacemaker

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 50 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: Yes

Sponsors

Centre Hospitalier Universitaire de Saint Etienne

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Guillaume MILLET, PhD

Role: STUDY_CHAIR

Jean Monnet University

Locations

CHU de Saint-Etienne

Saint-Etienne, , France

Countries

France

Other Identifiers

2011-A00895-36

Identifier Type: OTHER

Identifier Source: secondary_id

1108128

Identifier Type: -

Identifier Source: org_study_id