Effect of l - Arginine supplementation in athletes

Effect of L-Arginine supplementation on exercise performance and blood lactate levels in athletes

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT201009064703N1

Enrollment

Registered

2010-09-08

Start date

2009-01-20

Completion date

Unknown

Last updated

2018-02-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Physical activity in athletes. -

Interventions

Intervention 1: Intervention: Intake of l - arginine (5 g per day) for a period of 3 weeks. time of intake: 2 h after dinner. Intervention 2: Control: Placebo (5 g per day) such as starch tablets for

Treatment - Drugs

Treatment - Other

Intervention: Intake of l - arginine (5 g per day) for a period of 3 weeks. time of intake: 2 h after dinner.

Control: Placebo (5 g per day) such as starch tablets for a period of 3 weeks. time of intake: 2 h after dinner.

Eligibility

Sex/Gender

Male

Age

20 Years to 25 Years

Inclusion criteria

Inclusion criteria: Inclusion criteria: 1- sex: man 2- no intake of l- arginine supplement or other supplements 3- no intake of drugs 4- to be athlete Exclusion criteria: 1- intake of supplement or doping drugs 2- intake of drugs 3- intake of l - arginine supplement 4- have a medical problem

Exclusion criteria

Exclusion criteria:

Design outcomes

Primary

Measure	Time frame
Blood lactate. Timepoint: before exercise test, immediately after test and 30 minutes after test in day 1 and day 21. Method of measurement: lactometer, mmol/l.;Energy at anaerobic threshold. Timepoint: day 1 and day 21. Method of measurement: treadmill, kcal.;Distance to reach anaerobic threshold. Timepoint: day 1 and day 21. Method of measurement: treadmill, meter.;Time to reach anaerobic threshold. Timepoint: day 1 and day 21. Method of measurement: treadmill, s.;Heart rate at anaerobic threshold. Timepoint: day 1 and day 21. Method of measurement: treadmill, beats per min.;VO2max at anaerobic threshold. Timepoint: day 1 and day 21. Method of measurement: treadmill, ml/min/kbw.	—

Measure

Time frame

Blood lactate. Timepoint: before exercise test, immediately after test and 30 minutes after test in day 1 and day 21. Method of measurement: lactometer, mmol/l.;Energy at anaerobic threshold. Timepoint: day 1 and day 21. Method of measurement: treadmill, kcal.;Distance to reach anaerobic threshold. Timepoint: day 1 and day 21. Method of measurement: treadmill, meter.;Time to reach anaerobic threshold. Timepoint: day 1 and day 21. Method of measurement: treadmill, s.;Heart rate at anaerobic threshold. Timepoint: day 1 and day 21. Method of measurement: treadmill, beats per min.;VO2max at anaerobic threshold. Timepoint: day 1 and day 21. Method of measurement: treadmill, ml/min/kbw.

—

Secondary

Measure	Time frame
Body mass index. Timepoint: day 1 and day 21. Method of measurement: kg/m2, calculate.;Weight. Timepoint: day 1 and day 21. Method of measurement: INBODY3, kg.;Lean body mass. Timepoint: day 1 and day 21. Method of measurement: INBODY 3, Kg.;Fat mass. Timepoint: day 1 and day 21. Method of measurement: INBODY 3, Kg.	—

Countries

Iran (Islamic Republic of)

Contacts

Public ContactDr Ali Akbar Saboor Yaraghi

Tehran University of Medical Sciences

Saboor_A@yahoo.com+98 21889739014

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026