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

2026年5月7日 更新者：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.

調査の概要

状態

完了

条件

介入・治療

研究の種類

介入

入学 (実際)

24

段階

  • 適用できない

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究場所

  • ブラジル
    • Rio Grande do Sul
      • Santa Maria、Rio Grande do Sul、ブラジル、97105900
        • Centro de Educação Física e Desportos

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

  • 大人

健康ボランティアの受け入れ

いいえ

説明

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

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか？

デザインの詳細

  • 主な目的：他の
  • 割り当て：ランダム化
  • 介入モデル：クロスオーバー割り当て
  • マスキング：4倍

武器と介入

参加者グループ / アーム
介入・治療
実験的：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.
ダイエットサプリメント：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.
プラセボコンパレーター：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.
ダイエットサプリメント：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.

この研究は何を測定していますか？

主要な結果の測定

結果測定
メジャーの説明
時間枠
Countermovement Jump Height
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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
時間枠：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.

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

Universidade Federal de Santa Maria

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (実際)

2024年6月3日

一次修了 (実際)

2024年10月3日

研究の完了 (実際)

2024年12月2日

試験登録日

最初に提出

2026年4月30日

QC基準を満たした最初の提出物

2026年5月7日

最初の投稿 (実際)

2026年5月13日

学習記録の更新

投稿された最後の更新 (実際)

2026年5月13日

QC基準を満たした最後の更新が送信されました

2026年5月7日

最終確認日

2026年5月1日

詳しくは

本研究に関する用語

キーワード

その他の研究ID番号

  • 6.753.984
  • UFSM (その他の識別子：UFSM)

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