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Cross-education of Skill and Strength in Healthy People Subjected to an Upper-limb Disuse Model (IMMO-CROSS)

2026年5月22日 更新者:Iván Alejandro Cuyul Vásquez、Universidad Catolica de Temuco

Cross-education of Skill and Strength Through Contralateral Manual Dexterity Training in Healthy Young Adults Subjected to an Upper-limb Disuse Model: A Randomized Controlled Trial.

This randomized controlled trial aims to compare manual dexterity and strength between a group undergoing a contralateral manual dexterity training program and a no-intervention control group in healthy, physically inactive individuals subjected to an induced upper-limb disuse model.

調査の概要

状態

まだ募集していません

条件

介入・治療

詳細な説明

Cross-education of skill offers promising opportunities for the rehabilitation of upper-limb musculoskeletal injuries. An approach based on contralateral manual dexterity training could accelerate functional recovery, reduce motor skill loss during periods of immobilization, and optimize conventional rehabilitation protocols. However, controlled studies are needed to analyze the efficacy of specific unilateral training protocols designed to maximize cross-education before clinical translation. To date, no experimental studies have been published on healthy individuals subjected to upper-limb disuse models alongside contralateral skill training involving functional tasks. This cross-education effect could potentially prevent the loss of manual dexterity and strength that occurs during immobilization. For this research, a contralateral manual dexterity training protocol was developed based on the functional limitations commonly experienced by individuals with forearm and hand musculoskeletal injuries (e.g., distal radius fractures, wrist sprains, carpal tunnel syndrome, and tendinopathies). Additionally, the protocol incorporates characteristics from training programs that have demonstrated the greatest cross-education effect.

研究の種類

介入

入学 (推定)

34

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。

研究連絡先

  • 名前:Iván A. Cuyul-Vásquez, PhD(c)
  • 電話番号:+56452205205
  • メール:icuyul@uct.cl

研究場所

    • Araucania
      • Temuco、Araucania、チリ、4813302
        • UCT, Facultad de ciencias de la Salud
        • コンタクト:
          • Iván A. Cuyul-Vásquez, PhD(c)
          • 電話番号:+56452205205
          • メール:icuyul@uct.cl
        • コンタクト:
          • Cuyul-Vásquez Iván Cuyul-Vásquez, PhD(C)
          • 電話番号:+56452205205
          • メール:icuyul@uct.cl

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

はい

説明

Inclusion Criteria:

  • Individuals will be eligible for inclusion if they are right-handed adults aged 18 to 35 years with a body mass index (BMI) between 18.5 and 30 kg/m².
  • Individuals must be classified as physically inactive, defined as not meeting the World Health Organization criteria of at least 150 minutes of moderate-intensity physical activity or 75 minutes of vigorous-intensity physical activity per week.

Exclusion Criteria:

  • Individuals who have engaged in physical training (e.g., any form of strength or aerobic exercise) or specific manual dexterity training within the past 6 months. - Individuals who regularly participate in artistic, occupational, or sporting activities requiring high levels of manual dexterity (e.g., musicians, gamers, craftspeople).
  • Individuals with a history of orthopedic or traumatic injuries affecting either upper extremity. Individuals with pathologies or conditions that preclude safe training (e.g., uncontrolled hypertension, or visual, auditory, or cognitive impairments [for example, dyscalculia]).
  • Individuals currently using nutritional supplements or medications that interfere with the regulation of skeletal muscle mass and strength (e.g., whey protein, creatine) or the central nervous system (e.g., antidepressants, anxiolytics, hypnotics).

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:処理
  • 割り当て:ランダム化
  • 介入モデル:並列代入
  • マスキング:ダブル

武器と介入

参加者グループ / アーム
介入・治療
実験的:Contralateral manual dexterity training
Participants in the experimental group will perform contralateral manual dexterity training focused on moving 0.5, 1.0, or 1.5 kg cylinders using different grips and movements across various planes on a gridded board. Participants will execute various grips to place the cylinders into the quadrants indicated on a smartphone screen.
The subjects in the experimental group will perform contralateral manual dexterity training focused on moving cylinders of 0.5, 1 or 1.5 kilos with grips and movements in different planes on a gridded board. Participants will have to develop different grips and place the cylinders in the quadrants indicated on a smartphone screen.
介入なし:Control group without intervention

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
Fine Manual Dexterity
時間枠:Baseline and day 7
Fine manual dexterity will be assessed using the Functional Dexterity test (FDT). Using a stopwatch, the evaluator records the total time in seconds that the participant takes to complete the task.
Baseline and day 7
Force control
時間枠:Baseline and day 7
In a seated position with the elbow flexed, participants will perform isometric contractions to reach a target torque guided by real-time visual feedback. The accuracy of maintaining these contractions in the wrist flexor and extensor muscles will be assessed using a Humac Norm isokinetic dynamometer (Computer Sports Medicine, Inc., Stoughton, MA, USA). Participants will perform a continuous 60-second isometric contraction exercise. During this period, participants will adjust their force level to between 10% and 30% of their maximum voluntary contraction (MVC) at 10-second intervals. Three attempts will be performed per limb. The Root Mean Square Error (RMSE) will be recorded.
Baseline and day 7
Gross Manual Dexterity
時間枠:Baseline and day 7
This gross manual dexterity will be assessed using the same task performed during the experimental group's contralateral manual dexterity training. Specifically, participants will complete 15 trials, moving cylinders of varying weights across a gridded board following a sequence displayed on a smartphone. The time required to complete these 15 trials will be recorded.
Baseline and day 7

二次結果の測定

結果測定
メジャーの説明
時間枠
Handgrip strength
時間枠:Baseline and day 7
Maximum lumbrical and cylindrical grip strength will be assessed using a Jamar Plus+ digital hand dynamometer. The highest value from three attempts will be recorded for each assessment
Baseline and day 7
Joint Position Sense Test
時間枠:Baseline and day 7
Proprioception: Wrist flexion-extension joint position sense will be assessed using the Joint Position Sense Test (JPST). All measurements will be conducted with a Humac Norm isokinetic dynamometer (Computer Sports Medicine, Inc., Stoughton, MA, USA). Three attempts will be made per limb. The absolute error (difference in degrees between 30° and the angle achieved during the test) will be recorded.
Baseline and day 7
Left/right judgment
時間枠:Baseline and day 7
Left/right judgment will be assessed using the Recognise™ application (Noigroup, Adelaide, Australia). Performance on the laterality judgment task was quantified using the Inverse Efficiency Score (IES), calculated as the average reaction time of correct responses divided by the proportion of correct responses (IES = RT / PC). 3 blocks of 20 images (60 images total). Maximum exposure time: 5 seconds per image.
Baseline and day 7

その他の成果指標

結果測定
メジャーの説明
時間枠
Physical activity level
時間枠:Baseline and day 7
Weekly metabolic equivalents (MET-min/week) will be calculated using the validated Spanish version of the Global physical activity questionnaire (GPAQ).
Baseline and day 7
Psychological Distress
時間枠:Baseline
Psychological Distress, including symptoms of depression, anxiety, and stress, will be assessed using the 21-item Depression, Anxiety and Stress Scale (DASS-21). This self-report instrument will be used to quantify the severity of emotional distress across these three domains. This scale has a minimum score of 0 and a maximum of 126 points (total score calculated by doubling the sum of the 21 items). Higher scores in DASS-21 indicate greater psychological distress.
Baseline
Sleep Quality:
時間枠:Baseline
Sleep disturbances and overall sleep quality will be assessed using the Pittsburgh Sleep Quality Index (PSQI). This scale has a minimum score of 0 and a maximum of 21 points (higher scores indicate worse sleep quality)
Baseline
Daily steps
時間枠:During 7 days of immobilization
Physical activity will be monitored using a Xiaomi Band 9 smartwatch (number of daily steps), which participants will wear throughout the seven-day mobilization period.
During 7 days of immobilization
Sleep time
時間枠:During 7 days of immobilization
Sleep time will be measured using a Xiaomi Band 9 smartwatch (hours), which participants will wear throughout the seven-day immobilization period.
During 7 days of immobilization

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。

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協力者

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 (推定)

2026年5月25日

一次修了 (推定)

2026年10月1日

研究の完了 (推定)

2027年1月30日

試験登録日

最初に提出

2026年5月14日

QC基準を満たした最初の提出物

2026年5月22日

最初の投稿 (実際)

2026年5月29日

学習記録の更新

投稿された最後の更新 (実際)

2026年5月29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22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

その他の研究ID番号

  • INMO-CROSS-2026

個々の参加者データ (IPD) の計画

個々の参加者データ (IPD) を共有する予定はありますか?

いいえ

医薬品およびデバイス情報、研究文書

米国FDA規制医薬品の研究

いいえ

米国FDA規制機器製品の研究

いいえ

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