Motor Activity
Conditions
Brief summary
The present study aimed to evaluate the possible effect of nocturnal melatonin ingestion upon short-term performances, on the following morning. Twelve soccer players from a Tunisian squad (22.9 ±1.3 years, 1.80±0.05 m, and 72.0±8.8 kg) were volunteered to perform three testing sessions, with one test session per day. During each session, MEL (5mg) , MEL (8mg) or placebo were ingested, in a randomized order, before nocturnal sleep. The next morning (08:00h), participants performed the following psycho-cognitive and physical tests: Hooper's index, reaction time, vigilance, handgrip strength , squat jump , modified agility test , Wingate anaerobic test (peak power , mean power and fatigue index ). Rating of perceived exertion was recorded immediately after the WanT, and blood lactate measures were taken after 3min of recovery. Blood glucose was measured before and 3 min after the Wingate test.
Interventions
DIETARY_SUPPLEMENTExperimental: Melatonin
Our protocol was composed of three experimental sessions. During each testing session, participants were requested to attend the laboratory at 20:00h where they ingested a standardized light meal. Melatonin (5 mg or 8 mg) or placebo were ingested in capsule in the evening at 21:00h in a double-blind randomized design
DIETARY_SUPPLEMENTPlacebo
In a double-blind randomized design, participants have taken placebo supplementation in one of the three experimental sessions
Sponsors
kais
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
NONE
Eligibility
Sex/Gender
MALE
Age
20 Years to 23 Years
Healthy volunteers
Yes
Inclusion criteria
The participants were recruited based on the following criteria: (i) paticipants must be trained at 4-6 days per week for an average of 2 h daily and (ii) they must have at least 8 years of training experience
Exclusion criteria
* Subjects were excluded from the study if they present one of the following criteria : heart failure, antioxidant supplementation within 3 months before the study, lower-limb injuries
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Hooper's index score | At 07:30 am in the following day of the supplementation | Hooper's index score was measured using a specific questionnaire |
| handgrip strength (in Kg) | At 07:30 am in the following day of the supplementation | handgrip strength was measured using a calibrated hand dynamometer. |
| Blood lactate (µmol/l) | Blood lactate was measured only 3 minutes after physical testing in the following day of the supplementation | Lactate level was measured using Lactate Pro instrument. |
| reaction time (in secondes) | At 07:30 am in the following day of the supplementation | Reaction time was measured using an electronic timing device. |
| vigilance score | At 07:30 am in the following day of the supplementation | Vigilance score was measured using a specific questionnaire |
| squat jump (in centimeters) | At 07:30 am in the following day of the supplementation | Squat jump was assessed using a infrared jump system |
| agility (in secondes) | At 07:30 am in the following day of the supplementation | Agility was assessed using an electronic timing system. |
| anaerobic capacity (In watts) | At 07:30 am in the following day of the supplementation | Anaerobic capacity was assessed using a calibrated friction-loaded cycle ergometer |
| glucose level (µmol/l) | At 07:30 am in the following day of the supplementation (rest condition) and 3 minutes after physical testing in each experimental session | Glucose level was assessed using a glucometer |
| Rating of perceived exertion score | Rating of perceived exertion score was measured 3 minutes after physical testing in the following day of the supplementation | Rating of perceived exertion score was measured using a specific questionnaire |
Outcome results
None listed