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Juçara (Euterpe Edulis Martius) Supplementation Effect in Muscle Protection, Performance and Soreness in Lower Limbs After Exercise-Induced Muscle Damage

7. maj 2026 opdateret af: Fábio Juner Lanferdini, Universidade Federal de Santa Maria

Juçara (Euterpe Edulis Martius) Supplementation Effect in Muscle Protection, Performance and Soreness in Lower Limbs After Exercise-Induced Muscle Damage: A Six-Week Randomized, Triple-Blind, Placebo-Controlled Clinical Trial

The purpose of this study is to find out if taking a natural supplement made from the Juçara fruit (a Brazilian berry rich in antioxidants called anthocyanins) can help the body recover faster after damage caused by exercise. Researchers want to see if Juçara can reduce muscle soreness and help muscles regain their strength and quality more quickly compared to a placebo (a "dummy" pill with no active ingredients).

What happens during the study? The study included 24 healthy, active men. It was a "crossover" study, meaning every participant tried both the Juçara supplement and the placebo at different times.

Supplement Phase: Participants took 12 capsules a day for 7 days.

Muscle Damage Test: To cause temporary muscle damage, participants performed a specific jumping protocol (100 maximal jumps).

Recovery Monitoring: Researchers tracked the participants for 72 hours after the jumps to measure:

How high they could jump (strength/performance).

Muscle soreness (using a pain scale).

Muscle "quality" and stiffness (using ultrasound imaging).

Wait Period: After the first phase, participants waited 14 days (washout) before switching to the other supplement to repeat the process.

Studieoversigt

Status

Afsluttet

Betingelser

Juçara Supplementatios After Muscle Damage

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

Fase

Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

Brasilien
- Rio Grande do Sul
  - Santa Maria, Rio Grande do Sul, Brasilien, 97105900
    - Centro de Educação Física e Desportos

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

Voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

Males
Aged 18-40 years
Physically active, defined as performing at least three exercise sessions per week according to IPAQ questionnaire
No history at lower-limb within the previous six months
No medical restrictions for maximal exercise testing
No allergy to red fruits
No physical, cognitive and/or psychological limitations affecting the execution or understanding of the protocol
No history of lower-limb surgery
No use nutritional supplements within 30 days prior to study initiation
Abstention from caffeine, cacao, yerba mate tea, and soft drinks during the study protocol.

Exclusion Criteria:

Individuals younger than 18 or older than 40 years
Not physically active, defined as performing fewer than three exercise sessions per week according to IPAQ questionnaire
Presence of history at lower-limb injury within the previous six months
Presence of medical restrictions for maximal exercise testing
Known allergy to red fruits
Presence of physical, cognitive and/or psychological limitations affecting the execution or understanding of the protocol
History of lower-limb surgery
Use of nutritional supplements within 30 days prior to study initiation
Inability to abstain from caffeine, cacao, yerba mate tea, and soft drinks during the study protocol

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Primært formål: Andet
Tildeling: Randomiseret
Interventionel model: Crossover opgave
Maskning: Firedobbelt

Antal våben

Våben og indgreb

Deltagergruppe / Arm	Intervention / Behandling
Eksperimentel: Juçara group The sample consisted of 24 healthy, physically active men with any kind of experience in any physical exercise modality. Eligibility criteria were as follows: (1) male, aged 18-40 years; (2) physically active, defined as performing at least three exercise sessions per week according to IPAQ questionnaire; (3) no history at lower-limb within the previous six months; (4) no medical restrictions for maximal exercise testing; (5) no allergy to red fruits; (6) no physical, cognitive and/or psychological limitations affecting the execution or understanding of the protocol; (7) no history of lower-limb surgery; (8) no use nutritional supplements within 30 days prior to study initiation; and (9) abstention from caffeine, cacao, yerba mate tea, and soft drinks during the study protocol.	Kosttilskud: Juçara Total of 11 separate occasions under the Juçara condition. A familiarization session of CMJ and EIMD protocol (10 sets of CMJ repetitions with 1-minute rest between sets) was performed, followed by a 14-day washout period. During this visit, volunteers' descriptive data were assessed. On day 1 of this condition (72h pre EIMD), body mass was obtained, and participants received the supplementation (Juçara) to be consumed for 7 days (one capsule every 12 h). On day 2, the CSA from QUAD and HAMS, elastography from vastus lateralis (VL) and biceps femoris long head (BFlh) of the dominant limb, and the CMJ performance were assessed. After that, participants performed the EIMD protocol. Follow-up assessments were conducted at 24 h (day 3), 48 h (day 4), and 72 h (day 5) post-EIMD, repeating the same measurements. A 14-day washout period separated the two interventions.
Placebo komparator: Placebo Group The sample consisted of 24 healthy, physically active men with any kind of experience in any physical exercise modality. Eligibility criteria were as follows: (1) male, aged 18-40 years; (2) physically active, defined as performing at least three exercise sessions per week according to IPAQ questionnaire; (3) no history at lower-limb within the previous six months; (4) no medical restrictions for maximal exercise testing; (5) no allergy to red fruits; (6) no physical, cognitive and/or psychological limitations affecting the execution or understanding of the protocol; (7) no history of lower-limb surgery; (8) no use nutritional supplements within 30 days prior to study initiation; and (9) abstention from caffeine, cacao, yerba mate tea, and soft drinks during the study protocol.	Kosttilskud: Placebo group Total of 11 separate occasions under the placebo condition. A familiarization session of CMJ and EIMD protocol (10 sets of CMJ repetitions with 1-minute rest between sets) was performed, followed by a 14-day washout period. During this visit, volunteers' descriptive data were assessed. On day 1 of this condition (72h pre EIMD), body mass was obtained, and participants received the supplementation (placebo) to be consumed for 7 days (one capsule every 12 h). On day 2, the CSA from QUAD and HAMS, elastography from vastus lateralis (VL) and biceps femoris long head (BFlh) of the dominant limb, and the CMJ performance were assessed. After that, participants performed the EIMD protocol. Follow-up assessments were conducted at 24 h (day 3), 48 h (day 4), and 72 h (day 5) post-EIMD, repeating the same measurements. A 14-day washout period separated the two interventions.

Deltagergruppe / Arm

Intervention / Behandling

Eksperimentel: Juçara group

The sample consisted of 24 healthy, physically active men with any kind of experience in any physical exercise modality. Eligibility criteria were as follows: (1) male, aged 18-40 years; (2) physically active, defined as performing at least three exercise sessions per week according to IPAQ questionnaire; (3) no history at lower-limb within the previous six months; (4) no medical restrictions for maximal exercise testing; (5) no allergy to red fruits; (6) no physical, cognitive and/or psychological limitations affecting the execution or understanding of the protocol; (7) no history of lower-limb surgery; (8) no use nutritional supplements within 30 days prior to study initiation; and (9) abstention from caffeine, cacao, yerba mate tea, and soft drinks during the study protocol.

Kosttilskud: Juçara

Total of 11 separate occasions under the Juçara condition. A familiarization session of CMJ and EIMD protocol (10 sets of CMJ repetitions with 1-minute rest between sets) was performed, followed by a 14-day washout period. During this visit, volunteers' descriptive data were assessed. On day 1 of this condition (72h pre EIMD), body mass was obtained, and participants received the supplementation (Juçara) to be consumed for 7 days (one capsule every 12 h). On day 2, the CSA from QUAD and HAMS, elastography from vastus lateralis (VL) and biceps femoris long head (BFlh) of the dominant limb, and the CMJ performance were assessed. After that, participants performed the EIMD protocol. Follow-up assessments were conducted at 24 h (day 3), 48 h (day 4), and 72 h (day 5) post-EIMD, repeating the same measurements. A 14-day washout period separated the two interventions.

Placebo komparator: Placebo Group

Kosttilskud: Placebo group

Total of 11 separate occasions under the placebo condition. A familiarization session of CMJ and EIMD protocol (10 sets of CMJ repetitions with 1-minute rest between sets) was performed, followed by a 14-day washout period. During this visit, volunteers' descriptive data were assessed. On day 1 of this condition (72h pre EIMD), body mass was obtained, and participants received the supplementation (placebo) to be consumed for 7 days (one capsule every 12 h). On day 2, the CSA from QUAD and HAMS, elastography from vastus lateralis (VL) and biceps femoris long head (BFlh) of the dominant limb, and the CMJ performance were assessed. After that, participants performed the EIMD protocol. Follow-up assessments were conducted at 24 h (day 3), 48 h (day 4), and 72 h (day 5) post-EIMD, repeating the same measurements. A 14-day washout period separated the two interventions.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål	Foranstaltningsbeskrivelse	Tidsramme
Countermovement Jump Height Tidsramme: From pre Exercise Induced Muscle Damage protocol to Post-72h Exercise Induced Muscle Damage protocol.	Countermovement Jump (CMJ) hieght will be measured to assess using two force plates (AMTI OR6-6-2000; 1000 Hz). Measurements will be obtained at Baseline (Pre), and at 24, 48, and 72 hours following the exercise induced muscle damage (EIMD) protocol. Data will be expressed in centimeters (cm). Jump height will be calculated using take-off velocity and projectile motion principles.	From pre Exercise Induced Muscle Damage protocol to Post-72h Exercise Induced Muscle Damage protocol.
Contermovement jump power Tidsramme: From pre Exercise Induced Muscle Damage protocol to Post-72h Exercise Induced Muscle Damage protocol.	Countermovement Jump (CMJ) power will be evaluated using two force plates (AMTI OR6-6-2000; 1000 Hz). Peak power will be calculated based on the jump flight time or force-time curve. Assessments will be performed at Baseline (Pre), 24h, 48h, and 72h post exercise induced muscle damage. Data will be expressed in Watts (W). Power during the concentric phase (i.e., the propulsive phase; interval between the onset of propulsion and take-off) will be calculated by multiplying force by velocity.	From pre Exercise Induced Muscle Damage protocol to Post-72h Exercise Induced Muscle Damage protocol.
Quadriceps and hamstrings Echointensity Tidsramme: From pre Exercise Induced Muscle Damage protocol to Post-72h Exercise Induced Muscle Damage protocol.	Quadriceps and Hamstrings muscle echointensity will be assessed using ultrasonography to evaluate muscle damage. Images will be analyzed through gray-scale histogram analysis using ImageJ software. Assessments will be performed at Baseline (Pre-exercise), and at 24 hours, 48 hours, and 72 hours following the exercise-induced muscle damage (EIMD) protocol. Data will be expressed in arbitrary units (AU).	From pre Exercise Induced Muscle Damage protocol to Post-72h Exercise Induced Muscle Damage protocol.
Quadriceps and Hamstrings Cross-Sectional Area Tidsramme: From pre Exercise Induced Muscle Damage protocol to Post-72h Exercise Induced Muscle Damage protocol	Muscle Cross-Sectional Area from Quadriceps and Hamstrings will be assessed using an ultrasound with extended field of view mode at 50% of limb length. Quadriceps and Hamstrings Cros-Sectional areas will be expressed in cm².	From pre Exercise Induced Muscle Damage protocol to Post-72h Exercise Induced Muscle Damage protocol
Vastus Lateralis and Biceps Femoris Long Head stiffness Tidsramme: From pre Exercise Muscle Damage Protocol to Post-72h Exercise Induced Muscle Damage protocol.	Vastus Lateralis and Biceps Femoris Long Head muscle stiffness will be assessed using Shear Wave Elastography mode from an ultrasound. Muscle stiffness will be expressed in kilopascal (kPa).	From pre Exercise Muscle Damage Protocol to Post-72h Exercise Induced Muscle Damage protocol.
Quadriceps and Hamstrings muscle soreness Tidsramme: From pre Exercise Induced Muscle Damage protocol to Post-72h Exercise Induced Muscle Damage protocol.	Muscle soreness of the quadriceps will be assessed using a Visual Analogue Scale (VAS). Measurements will be obtained at Baseline (Pre-exercise), Immediately Post-exercise, 24 hours, 48 hours, and 72 hours following the Exercise Induced Muscle Damage (EIMD) protocol. Data will be expressed on a scale from 0 (no soreness) to 30 centimeters (worst possible soreness).	From pre Exercise Induced Muscle Damage protocol to Post-72h Exercise Induced Muscle Damage protocol.

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Universidade Federal de Santa Maria

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

3. juni 2024

Primær færdiggørelse (Faktiske)

3. oktober 2024

Studieafslutning (Faktiske)

2. december 2024

Datoer for studieregistrering

Først indsendt

30. april 2026

Først indsendt, der opfyldte QC-kriterier

7. maj 2026

Først opslået (Faktiske)

13. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

13. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

7. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Andre undersøgelses-id-numre

6.753.984
UFSM (Anden identifikator: UFSM)

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Juçara

Instituto de Cardiologia do Rio Grande do Sul

Ukendt

Effekt af Açaí Juçara-forbrug på endotelfunktion og arteriel stivhed

Overvægt og fedme

Brasilien
University Vila Velha

Ikke rekrutterer endnu

Supplerende ydeevne og motion med Euterpe Edulis for mænds forbedring (SPAEME)

Klinisk forsøg

Juçara (Euterpe Edulis Martius) Supplementation Effect in Muscle Protection, Performance and Soreness in Lower Limbs After Exercise-Induced Muscle Damage