The Effect of Beetroot Juice on Muscle Strength and Muscle EMG Activity During Isokinetic Performance (NO Isokinetic)
Effects of Beetroot Juice Supplementation on Neuromuscular Activity and Isokinetic Strength and Power During Maximal Exercise
Studieoversigt
Status
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
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.
Undersøgelsestype
Tilmelding (Faktiske)
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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Greater Poland Voivodeship
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Poznan, Greater Poland Voivodeship, Polen, 61-871
- Akademia Wychowania Fizycznego
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Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
- age ≥18 years,
- participation in at least three structured training sessions per week,
- absence of musculoskeletal injuries within the previous 12 months
Exclusion Criteria:
- smoking,
- any injury within the past year
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Diagnostisk
- Tildeling: Randomiseret
- Interventionel model: Crossover opgave
- Maskning: Ingen (Åben etiket)
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
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Eksperimentel: Rødbedejuice
rødbedejuice med høj koncentration af nitrater (800mg)
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akut dosis af rødbedejuice
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Placebo komparator: Depleted Beetroot Juice
beetroot juice with low concentration of nitrates
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udtømt nitrat rødbedejuice
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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The effect of beetroot juice ingestion on isokinetic strength
Tidsramme: 2 hours
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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.
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2 hours
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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The effect of Beetroot Juice consumption on EMG muscle activity
Tidsramme: 2 hours
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Neuromuscular activity was assessed using surface electromyography of the vastus medialis oblique and vastus lateralis oblique muscles while Isokinetic tests
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2 hours
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Samarbejdspartnere og efterforskere
Efterforskere
- Ledende efterforsker: Robert Olek, Prof, Poznań University of Physical Education
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Andre undersøgelses-id-numre
- RMPN2021/JJ3
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
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Kliniske forsøg med Muskelstyrke
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