Objectives: The purpose of this study was to investigate how exhaustion exercise affects testosterone levels and plasma lactates in road cyclists who are supplemented with oral zinc for 4 weeks. Design, Setting and Conduct: For this reason, sixteen male road cyclists were selected from the Tehran traffic team and under body composition were divided into two groups; zinc group and control group. Before beginning of research, plasma zinc was assessed. After 4 weeks zinc supplementation (30 mg/d ̄ ˡ), blood samples were collected from each subjects before and after an exhaustive exercise bout. Inclusion criteria: Having 3-4 years of exercise experience; the absence of any disease in the past month such as to cold; respiratory infection; Hungarian; and fever; the subjects hadn’t ingested any type of sport or vitamin-mineral supplements. Exclusions criteria: The consuming of sport or vitamin-mineral supplements; the use of alcohol and caffeine 48 hours before the test; participate in heavy exercise 48 hours before the test,; exposure to disease. Interventions: Zinc supplementation and one bout of exhaustive exercise. Main Outcome Measures Variables: Free and Total Testosterone, and Plasma Lactate.
General information
Acronym
IRCT registration information
IRCT registration number:IRCT201110107754N1
Registration date:2011-10-29, 1390/08/07
Registration timing:retrospective
Last update:
Update count:0
Registration date
2011-10-29, 1390/08/07
Registrant information
Name
Leila Shafiei Neek
Name of organization / entity
Faculty of Physical Education and Sport Sciences, University of Tehran
Country
Iran (Islamic Republic of)
Phone
+98 21 2258 9952
Email address
shafieineek@ut.ac.ir
Recruitment status
Recruitment complete
Funding source
investigator
Expected recruitment start date
2010-06-07, 1389/03/17
Expected recruitment end date
2010-08-21, 1389/05/30
Actual recruitment start date
empty
Actual recruitment end date
empty
Trial completion date
empty
Scientific title
Effect of Zinc Supplementation on Serum Testosterone and Plasma Lactate in Cyclist after one Bout of Exhaustive Exercise
Public title
Sport Nutrition
Purpose
Basic scienece
Inclusion/Exclusion criteria
Inclusions criteria;Having 3-4 years of exercise experience;the absence of any disease in the past month such as to cold; respiratory infection; Hungarian;and fever; the subjects hadn’t ingested any type of sport or vitamin-mineral supplements.
Exclusions criteria; the consuming of sport or vitamin-mineral supplements; the use of alcohol and caffeine 48 hours before the test; participate in heavy exercise 48 hours before the test; exposure to disease.
Age
From 20 years old to 30 years old
Gender
Male
Phase
2-3
Groups that have been masked
No information
Sample size
Target sample size:
16
Randomization (investigator's opinion)
Not randomized
Randomization description
Blinding (investigator's opinion)
Double blinded
Blinding description
Placebo
Used
Assignment
Parallel
Other design features
Secondary Ids
empty
Ethics committees
1
Ethics committee
Name of ethics committee
Ethics Committee of Tehran University, Department of Physical Education.
Street address
Faculty of Physical Education and Sport Science of Tehran University, Northern Kargar Ave, Tehran, Iran.
City
Tehran
Postal code
Approval date
2010-05-26, 1389/03/05
Ethics committee reference number
20
Health conditions studied
1
Description of health condition studied
subjects were Healthy
ICD-10 code
-
ICD-10 code description
-
Primary outcomes
1
Description
Total Testosterone
Timepoint
before and after exhaustive exercise
Method of measurement
by Immunoassay method
2
Description
Plasma Lactate
Timepoint
before and after exhaustive exercise
Method of measurement
by Enzyme Caloriemetri method
3
Description
Free Testosteron
Timepoint
before and after exhaustive exercise
Method of measurement
by Elisa Kit
Secondary outcomes
1
Description
no
Timepoint
no
Method of measurement
no
Intervention groups
1
Description
Placebo= 30 mg dextrose
Category
Placebo
2
Description
Zinc supplementation= 30 mg as zinc sulphat
Category
Other
Recruitment centers
1
Recruitment center
Name of recruitment center
Tehran City Cycling Traffic team
Full name of responsible person
Leila Shafiei Neek
Street address
City
Teharn
Sponsors / Funding sources
1
Sponsor
Name of organization / entity
Investigator
Full name of responsible person
Leila Shafiei Neek
Street address
Faculty of Physical Education and Sport Sciences, University of Tehran, Northern Kargar Ave
City
Tehran
Grant name
Grant code / Reference number
Is the source of funding the same sponsor organization/entity?
Yes
Title of funding source
Investigator
Proportion provided by this source
100
Public or private sector
empty
Domestic or foreign origin
empty
Category of foreign source of funding
empty
Country of origin
Type of organization providing the funding
empty
Person responsible for general inquiries
Contact
Name of organization / entity
Faculty of Physical Education and Sport Science of Tehran University