Muscle StrengthNO IsokineticNCT07605455
The Effect of Beetroot Juice on Muscle Strength and Muscle EMG Activity During Isokinetic Performance
A study testing Beetroot juice in people with Muscle Strength and Isokinetic Test, run by Poznan University of Physical Education at 1 site in Poland.
Trial summary
The primary aim of the current study is determine the effect of beetroot juice consumption on neuromuscular activation, isokinetic muscle strength and power Read more about this study
- Who is it for?
- Ages 18 to 35 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Muscle Strength, Isokinetic Test
- What is being tested?
- Beetroot juice
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 13 participants
- Where
- 1 sitePoland
- Study dates
- 15 May 2025to 2 Jul 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 35 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- age ≥18 years,
- participation in at least three structured training sessions per week,
- absence of musculoskeletal injuries within the previous 12 months
Who cannot join
- smoking,
- any injury within the past year
Trial locations and contacts
1 site in 1 country.
Poland1 site
Akademia Wychowania Fizycznego
Poznan, Greater Poland Voivodeship, 61-871
About this study
Official title: Effects of Beetroot Juice Supplementation on Neuromuscular Activity and Isokinetic Strength and Power During Maximal Exercise
The primary aim of the current study is determine the effect of beetroot juice consumption on neuromuscular activation, isokinetic muscle strength and power
Read the detailed description
Participants completed two experimental sessions in a randomized, double-blind, placebo-controlled crossover design separated by a minimum 3-day washout period. Prior to each session, participants were instructed to avoid nitrate-rich foods, strenuous exercise, antibacterial mouthwash, chewing gum, and tooth brushing.
All testing sessions were performed in the morning following an overnight fast. Upon arrival, anthropometric measurements were obtained and participants consumed either a nitrate-rich beetroot juice supplement (highNO) or nitrate-depleted placebo (lowNO). Following a standardized 2-hour absorption period, surface EMG electrodes were placed on the vastus medialis oblique (VMO) and vastus lateralis oblique (VLO) muscles according to SENIAM guidelines. Capillary blood samples were collected before exercise and 3 minutes after the fatigue protocol for blood lactate assessment.
Participants then completed a standardized 10-minute warm-up followed by isokinetic testing using a Biodex dynamometer. Testing was performed on the dominant lower limb at angular velocities of 180°/s, 60°/s, and 240°/s. Three maximal repetitions were performed at 60°/s and 180°/s, while a 30-repetition fatigue protocol was completed at 240°/s. Outcome measures included peak torque, peak power, total work, torque-angle variables, EMG activity, and blood lactate concentration.
- Conditions
- Muscle Strength, Isokinetic Test
- Being tested
- Beetroot juice, Placebo
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Beetroot juiceDietary supplement
acute dose of beetroot juice
PlaceboDietary supplement
depleted nitrate beetroot juice
| Study group | Role | What they receive |
|---|---|---|
| Beetroot juice | Experimental | beetroot juice with high concentration of nitrates ( 800mg) Receives: Dietary Supplement: Beetroot juice |
| Depleted Beetroot Juice | Placebo comparator | beetroot juice with low concentration of nitrates Receives: Dietary Supplement: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
The effect of beetroot juice ingestion on isokinetic strength
The aim of the present study was to examine the effects of acute ignestion of nitrate rich suplement compared with placebo on isokinetic muscle performance during knee extension and flexion tasks performed using an isokinetic dynamometer.
Measured: 2 hours
Secondary outcomes (1)
The effect of Beetroot Juice consumption on EMG muscle activity
Neuromuscular activity was assessed using surface electromyography of the vastus medialis oblique and vastus lateralis oblique muscles while Isokinetic tests
Measured: 2 hours
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted26 May 2026
- Study start15 May 2025
- Primary completion15 May 2025
- Study completion2 Jul 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Muscle StrengthStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Diagnosis
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- None (open label)
- Enrolment
- 13 participants (actual)
Sponsor and investigators
- Lead sponsor
- Poznan University of Physical Education
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Robert Olek, Prof, Principal investigator, Poznan University of Physical Education
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07605455
- Sponsor's protocol ID
- RMPN2021/JJ3
- Acronym
- NO Isokinetic
- Status last verified
- May 2026
- First submitted
- 18 May 2026
- Last updated
- 26 May 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 26 May 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Beetroot Juice Supplementation on Neuromuscular Activity and Isokinetic Strength and Power During Maximal Exercise
- ClinicalTrials.gov ID
- NCT07605455
- Acronym / sponsor ID
- NO Isokinetic / RMPN2021/JJ3
- Conditions
- Muscle Strength, Isokinetic Test
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 13 participants (actual)
- Lead sponsor
- Poznan University of Physical EducationUniversity, hospital or other
- Study start
- 15 May 2025 (actual)
- Primary completion
- 15 May 2025 (actual)
- Study completion
- 2 Jul 2025 (actual)
- First posted
- 26 May 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The primary aim of the current study is determine the effect of beetroot juice consumption on neuromuscular activation, isokinetic muscle strength and power
Detailed description
Participants completed two experimental sessions in a randomized, double-blind, placebo-controlled crossover design separated by a minimum 3-day washout period. Prior to each session, participants were instructed to avoid nitrate-rich foods, strenuous exercise, antibacterial mouthwash, chewing gum, and tooth brushing.
All testing sessions were performed in the morning following an overnight fast. Upon arrival, anthropometric measurements were obtained and participants consumed either a nitrate-rich beetroot juice supplement (highNO) or nitrate-depleted placebo (lowNO). Following a standardized 2-hour absorption period, surface EMG electrodes were placed on the vastus medialis oblique (VMO) and vastus lateralis oblique (VLO) muscles according to SENIAM guidelines. Capillary blood samples were collected before exercise and 3 minutes after the fatigue protocol for blood lactate assessment.
Participants then completed a standardized 10-minute warm-up followed by isokinetic testing using a Biodex dynamometer. Testing was performed on the dominant lower limb at angular velocities of 180°/s, 60°/s, and 240°/s. Three maximal repetitions were performed at 60°/s and 180°/s, while a 30-repetition fatigue protocol was completed at 240°/s. Outcome measures included peak torque, peak power, total work, torque-angle variables, EMG activity, and blood lactate concentration.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Beetroot juice | Experimental | Dietary Supplement: Beetroot juicebeetroot juice with high concentration of nitrates ( 800mg) |
| Depleted Beetroot Juice | Placebo comparator | Dietary Supplement: Placebobeetroot juice with low concentration of nitrates |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (3 listed)
- age ≥18 years,
- participation in at least three structured training sessions per week,
- absence of musculoskeletal injuries within the previous 12 months
Key exclusion criteria (2 listed)
- smoking,
- any injury within the past year
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Beetroot juiceacute dose of beetroot juice | Dietary supplement | Beetroot juice |
| Placebodepleted nitrate beetroot juice | Dietary supplement | Depleted Beetroot Juice |
Primary outcome
The effect of beetroot juice ingestion on isokinetic strength
Time frame: 2 hours
The aim of the present study was to examine the effects of acute ignestion of nitrate rich suplement compared with placebo on isokinetic muscle performance during knee extension and flexion tasks performed using an isokinetic dynamometer.
1 secondary outcome
The effect of Beetroot Juice consumption on EMG muscle activity
Time frame: 2 hours
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 26 May 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Robert Olek, Prof principal investigator
Poznan University of Physical Education
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Beetroot juice in people with Muscle Strength and Isokinetic Test, run by Poznan University of Physical Education at 1 site in Poland.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 26 May 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Poland. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
The effect of beetroot juice ingestion on isokinetic strength (time frame: 2 hours). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 26 May 2026.