Effects of Sleep Deprivation on Blood Hormones and Inflammatory Status After Exercise Induced-muscle Damage

Study Overview
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Brief Summary
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The aims of this study are examine the effects of sleep deprivation in muscle recovery after a maximum eccentric resistance exercise session performed on an isokinetic dynamometer (24 series of 10 repetitions). The sample will consist of 10 men, sedentary, clinically healthy, aged between 20 and 31 years old. Two experimental groups will be developed: EXE-SLEEP, in which subjects will perform the exercise protocol ( 18:00-19:00) and will be subject to normal period of sleep for 3 nights; EXE-TOTAL, in which subjects will perform the same exercise protocol and will be sleep deprived for 60 hours, followed by one night of sleep rebound.

Detailed Description
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The blood parameters analyzed will be: Creatine kinase and myoglobin: before, immediately after, 2, 4, 12, 24, 36, 48, and 60 hours after exercise protocol. Total and free testosterone, IGF-1, and cortisol: before, immediately after, 2, 4, 12, 24, 36, 48, and 60 hours after exercise protocol. Moreover, from 19:00 of the second day to 19:00 of the third day it will be collected blood samples every 2 hours. GH: during the second night, GH will be evaluated every 1 hour, from 23:00 to 07:00. TNF-alfa, IL-6, IL-1 beta, IL-10, and IL-1ra: before, immediately after, and 2 hour after exercise, as well every 4 hours from 19:00 of the second day to 19:00 of the third day. It will be evaluated isometric strength every 12 hours, as well visual analog scale of pain.

Official Title
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Effects of Sleep Deprivation on Blood Hormones and Inflammatory Status After Exercise Induced-muscle Damage

Conditions
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Sleep, Sleep Deprivation

Intervention / Treatment
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* Other: Sleep deprivation
* Other: Normal sleep


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: healthy subjects sedentary sleep duration between 6-8 hours peer night Exclusion Criteria: smokers use vitamin supplements, like C and E drink two doses of alcohol/day or > 4 doses in one occasion use of anti-inflammatory drugs antilipidemic drugs anemia muscle or joint diseases cardiovascular diseases diabetes renal diseases sleep disturbances breathing disorders

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 31 Years

Sexes Eligible for Study
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Male

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

Primary Purpose: Basic Science
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Sleep deprivation<br>Exercise induced-muscle damage protocol followed by 60h of sleep deprivation (two nights) and one night of normal sleep (rebound). | Other: Sleep deprivation<br>* This group will perform 24 sets of 10 maximum repetitions of eccentric contractions for quadriceps and than will keep awake for 60 hours (2 nights), followed by 1 night of sleep, all inside the lab. During whole protocol, it will be collected several blood samples for evaluation of hormones, cytokines and muscle damage parameters. It will be also evaluated isometric strength and pain.<br>* Other names: Sleep and muscle recovery;|
| Experimental: Normal sleep<br>Exercise induced-muscle damage protocol followed by 3 nights of normal sleep | Other: Normal sleep<br>* This group will perform 24 sets of 10 maximum repetitions of eccentric contractions for quadriceps and and will be able to sleep the 3 nights. During whole protocol, it will be collected several blood samples for evaluation of hormones, cytokines and muscle damage parameters. It will be also evaluated isometric strength and pain.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change from baseline in isometric strength |  | Before exercise, immediatly after, 12, 24, 36, 48, and 60 hours after exercise induced-muscle damage | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Area Under Curve for serum total and free testosterone, IGF-1, and cortisol |  | Blood samples will be collected every 2 hours, for 24 hours. |