Cette page a été traduite automatiquement et l'exactitude de la traduction n'est pas garantie. Veuillez vous référer au version anglaise pour un texte source.

Effects of Physical and Cognitive Fatigue on Reaction Time and Depth Perception in Adolescents

28 septembre 2026 mis à jour par: Ahmet Kaan Aslan, AslanAhmetKaan

Differential Effects of Physical, Cognitive, and Combined Fatigue on Reaction Time and Depth Perception in Adolescents

This study investigates how physical fatigue, cognitive fatigue, and a combination of both affect reaction time and depth perception in adolescents.

Sixty healthy adolescents will participate in four experimental conditions: a control condition, a physical fatigue condition, a cognitive fatigue condition, and a combined fatigue condition. Physical fatigue will be induced using a modified shuttle run protocol, while cognitive fatigue will be induced using computerized Stroop and mental arithmetic tasks.

Reaction time will be assessed using the BlazePod system, and depth perception will be evaluated using the Titmus Fly Stereotest before and after each condition. Heart rate, perceived exertion, and mental fatigue will also be measured to verify the effectiveness of the fatigue protocols.

The findings may improve understanding of how different types of fatigue influence perceptual and motor performance in adolescents and may contribute to the development of safer and more effective training and sport participation strategies.

Aperçu de l'étude

Statut

Complété

Les conditions

Intervention / Traitement

Description détaillée

Fatigue is a multifactorial phenomenon that can impair cognitive, perceptual, and motor performance. While the independent effects of physical fatigue and cognitive fatigue have been widely investigated, limited evidence exists regarding their comparative and combined effects on reaction time and depth perception during adolescence. Because perceptual and motor functions play a critical role in sports performance, injury prevention, and daily activities, understanding the effects of different fatigue states in adolescents is of practical and scientific importance.

The purpose of this study is to examine the differential effects of physical fatigue, cognitive fatigue, and combined fatigue on reaction time and depth perception in healthy adolescents. A within-subject crossover design will be employed, in which each participant completes four experimental conditions: control, physical fatigue, cognitive fatigue, and combined fatigue. Physical fatigue will be induced using a modified 20-meter shuttle run protocol. Cognitive fatigue will be induced through computerized Stroop and mental arithmetic tasks designed to impose sustained demands on attention, inhibitory control, working memory, and information processing. The combined fatigue condition will include both physical and cognitive fatigue protocols within the same session.

Reaction time will be measured using the BlazePod wireless light-based system, and depth perception will be assessed using the Titmus Fly Stereotest. Measurements will be obtained immediately before and after each experimental condition. Heart rate, rating of perceived exertion, and mental fatigue scores will be collected as manipulation checks to confirm the effectiveness of the fatigue protocols.

The results of this study are expected to improve understanding of the mechanisms through which different types of fatigue influence perceptual and motor performance in adolescents and may provide practical implications for youth sports training, performance monitoring, and injury prevention strategies.

Type d'étude

Interventionnel

Inscription (Réel)

60

Phase

  • N'est pas applicable

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Lieux d'étude

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

14 ans à 18 ans (Enfant, Adulte)

Accepte les volontaires sains

Oui

Sexes éligibles pour l'étude

Tout

La description

Inclusion Criteria:

  • Adolescents aged 14 to 18 years.
  • Male or female participants.
  • Normal or corrected-to-normal vision.
  • Ability to understand and follow study procedures.
  • Written informed consent from both the participant and a parent/legal guardian.

Exclusion Criteria:

  • History of neurological disorders.
  • Visual disorders affecting depth perception.
  • Orthopedic injuries or musculoskeletal conditions limiting physical activity.
  • Any medical condition that would contraindicate participation in physical exercise.
  • Failure to complete all experimental sessions.

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Science basique
  • Répartition: Randomisé
  • Modèle interventionnel: Affectation croisée
  • Masquage: Aucun (étiquette ouverte)

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: Control Condition

Participants completed the testing procedures without exposure to any physical or cognitive fatigue protocol. Reaction time and depth perception were assessed before and after the control condition.

Participants completed the testing procedures without exposure to any physical or cognitive fatigue protocol.

Expérimental: Physical Fatigue Condition

Participants completed a 16-minute modified 20-meter shuttle run protocol designed to induce physical fatigue. Reaction time and depth perception were assessed before and after the protocol.

A 16-minute modified 20-meter shuttle run protocol designed to induce physical fatigue through progressively increasing running intensity.

Expérimental: Cognitive Fatigue Condition

Participants completed a 16-minute cognitive fatigue protocol consisting of an 8-minute Stroop task and an 8-minute mental arithmetic task. Reaction time and depth perception were assessed before and after the protocol.

A 16-minute computerized protocol consisting of Stroop and mental arithmetic tasks designed to induce cognitive fatigue.

Expérimental: Combined Fatigue Condition

Participants completed a combined fatigue protocol consisting of 8 minutes of a modified shuttle run followed by 4 minutes of a Stroop task and 4 minutes of a mental arithmetic task. Reaction time and depth perception were assessed before and after the protocol.

A protocol combining physical and cognitive fatigue tasks, including a modified shuttle run, Stroop task, and mental arithmetic task.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Reaction Time
Délai: Immediately before and immediately after each experimental condition.

Reaction time will be assessed using the BlazePod wireless light-based system. Reaction time will be recorded in milliseconds as the latency between stimulus presentation and participant response. Two trials will be performed, and the best performance will be used for analysis.

Immediately before and immediately after each experimental condition.
Depth Perception
Délai: Immediately before and immediately after each experimental condition.

Depth perception will be assessed using the Titmus Fly Stereotest. Stereopsis will be expressed in arc seconds, with lower values indicating better depth perception performance. Two trials will be conducted at each measurement point, and the lowest value will be used for analysis.

Immediately before and immediately after each experimental condition.

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Heart Rate
Délai: Immediately before and immediately after each experimental condition.

Heart rate will be measured before and after each experimental condition using photoplethysmography (PPG)-based smartwatches to verify the effectiveness of fatigue induction.

Immediately before and immediately after each experimental condition.
Rating of Perceived Exertion (RPE)
Délai: Perceived exertion will be assessed using the Borg CR-20 Scale before and after each experimental condition to evaluate subjective fatigue levels.

Perceived exertion will be assessed using the Borg CR-20 Scale before and after each experimental condition to evaluate subjective fatigue levels.

Perceived exertion will be assessed using the Borg CR-20 Scale before and after each experimental condition to evaluate subjective fatigue levels.
Mental Fatigue Scale Score
Délai: Immediately before and immediately after each experimental condition.

Mental fatigue will be assessed using the Mental Fatigue Scale (MFS), a 15-item self-report questionnaire measuring cognitive, emotional, and sensory aspects of fatigue.

Immediately before and immediately after each experimental condition.

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

Les enquêteurs

  • Chercheur principal: Ahmet Kaan ASLAN, PhD, Gazi University

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Réel)

1 avril 2026

Achèvement primaire (Réel)

21 mai 2026

Achèvement de l'étude (Réel)

31 mai 2026

Dates d'inscription aux études

Première soumission

28 septembre 2026

Première soumission répondant aux critères de contrôle qualité

28 septembre 2026

Première publication (Réel)

2 octobre 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

2 octobre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

28 septembre 2026

Dernière vérification

1 septembre 2026

Plus d'information

Termes liés à cette étude

Autres numéros d'identification d'étude

  • Kaaslan-1

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

NON

Description du régime IPD

Individual participant data will not be made publicly available. Data contain information collected from adolescent participants, and sharing is restricted to protect participant confidentiality and privacy.

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Non

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .