Assessment of The Effect of Oral Potassium Nitrate Supplementation on Post-Exercise Delayed Onset Muscle Soreness Indices

Assessment of The Effect of Oral Potassium Nitrate Supplementation on Post-Exercise Delayed Onset Muscle Soreness (DOMS) Indices Among Sedentary Individuals Between 18 to 40 Years old: A Double-Blind Randomized Cross-Over Clinical Trial

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20210512051273N1

Enrollment

Registered

2021-10-23

Start date

2021-09-23

Completion date

Unknown

Last updated

2021-11-01

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

Conditions

Post-Exercise Delayed Onset Muscle Soreness. Disorders of muscle in diseases classified elsewhere

Interventions

Intervention 1: Intervention group: The intervention in this study includes the consumption of 1000 mg of potassium nitrate (containing about 600 mg of nitrate and 400 mg of potassium) made by Qatran

Eligibility

Sex/Gender

All

Age

18 Years to 40 Years

Inclusion criteria

Inclusion criteria: Age between 18 to 40 years Consent to enter the study Not having physical or mental illness which increase the risk of impaired study progress Sedentary lifestyle (less than 3 days of sports activity for 30 minutes a week in the last 3 months) No addiction to drugs, narcotics and tobacco No pregnancy and breastfeeding No pain or injury in the biceps brachii muscle that will be studied

Exclusion criteria

Exclusion criteria: Taking different types of drugs during the week before the study Taking tonics and sports supplements during 1 month before History of musculoskeletal injury during the last three months Using foods containing more than 50 mg of nitrate per 100 g of food within 24 hours before the research protocol

Design outcomes

Primary

Measure	Time frame
Biceps Brachii Muscle Tenderness. Timepoint: Before Exercise, Days 2 and 4 Post-Exercise. Method of measurement: Placing a wooden ball with a diameter of 3 cm, 3 cm above the crease of the elbow and place a sphygmomanometer on it and inflate the cuff up to 250 mm Hg and record the amount of pain on graded paper (Visual Analogue Scale).;Strength of Biceps Brachii Muscle. Timepoint: Before Exercise, Days 2 and 4 Post-Exercise. Method of measurement: Measuring muscle force with a dynamometer.;Elbow Passive and Active Range of Motion. Timepoint: Before Exercise, Days 2 and 4 Post-Exercise. Method of measurement: Measuring angles with goniometer.	—

Measure

Time frame

Biceps Brachii Muscle Tenderness. Timepoint: Before Exercise, Days 2 and 4 Post-Exercise. Method of measurement: Placing a wooden ball with a diameter of 3 cm, 3 cm above the crease of the elbow and place a sphygmomanometer on it and inflate the cuff up to 250 mm Hg and record the amount of pain on graded paper (Visual Analogue Scale).;Strength of Biceps Brachii Muscle. Timepoint: Before Exercise, Days 2 and 4 Post-Exercise. Method of measurement: Measuring muscle force with a dynamometer.;Elbow Passive and Active Range of Motion. Timepoint: Before Exercise, Days 2 and 4 Post-Exercise. Method of measurement: Measuring angles with goniometer.

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Countries

Iran (Islamic Republic of)

Contacts

Public ContactMohammad Mahdi Tavana

Tehran University of Medical Sciences

tavana.md@yahoo.com+98 21 2281 8672

Outcome results

None listed

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