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Cognitive Responses to Acute Breath-Hold Diving Training in Female Divers

No phase Interventional Sport Physiology Cognitive Performance

For patients and families

In plain language

An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.

What is being studied
The protocol lists: Land-Based Breath-Hold Training, Water-Based Breath-Hold Training, Control Session.
Who it may be relevant to
Registry conditions: Sport Physiology, Cognitive Performance. Basic parameters: 18 years — 30 years · All.
What needs checking
Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
Where it takes place
Turkey (Türkiye)
Next step
Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →

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Official title

Investigation of Cognitive Responses to Acute Breath-Hold Diving Training in Female Divers

Overview

This study aims to investigate the acute cognitive and physiological responses to breath-hold diving training in trained female divers. Participants will complete three separate sessions including a control session, a land-based breath-hold training session, and a water-based breath-hold training session in randomized order. Cognitive performance, mood state, heart rate responses, respiratory function, and maximal breath-hold capacity will be evaluated before and after the interventions. The study is expected to improve understanding of how acute apnea-based diving exercises influence cognitive functions and physiological adaptations under different environmental conditions.

Interventions

  • Behavioral Land-Based Breath-Hold Training
    Participants will perform structured land-based breath-hold exercises consisting of repeated apnea efforts at 60% of individual maximal breath-hold capacity with standardized rest intervals.
  • Behavioral Water-Based Breath-Hold Training
    Participants will perform structured breath-hold exercises in a swimming pool environment consisting of repeated apnea efforts at 60% of individual maximal breath-hold capacity with standardized rest intervals.
  • Other Control Session
    Participants will undergo baseline cognitive, respiratory, mood, and physiological assessments without structured apnea or breath-hold exercise intervention.

Primary outcome measures

  • Working Memory Accuracy (2-Back Test) [Time frame: Baseline and immediately after the intervention, within 5 minutes post-intervention.]
  • Reaction Time During the 2-Back Test [Time frame: Baseline and immediately after the intervention, within 5 minutes post-intervention.]
Secondary outcome measures (4)
  • Brunel Mood Scale (BRUMS) Total Score [Time frame: Baseline and immediately after the intervention, within 5 minutes post-intervention.]
  • Maximum Breath-Hold Duration [Time frame: Baseline during the control session before intervention sessions.]
  • Resting Heart Rate [Time frame: Before each experimental session.]
  • Exercise Heart Rate Response [Time frame: During the intervention session.]

Eligibility criteria

Inclusion criteria

  • Licensed breath-hold or free-diving athletes
  • Aged between 18 and 30 years
  • Minimum of 5 years of training experience
  • No known cardiovascular or pulmonary disease
  • Non-smokers
  • Willing to participate voluntarily
  • Refraining from intense exercise within 24 hours before testing

Exclusion criteria

  • Use of performance-enhancing drugs or ergogenic aids
  • Presence of chronic sports injury
  • Alcohol consumption within 24 hours before testing
  • Caffeine intake within 2 hours before testing
  • Sleep deprivation or severe fatigue
  • Current medication use Fear of water or inability to complete breath-hold procedures

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: Yes

Study design

Allocation
Randomized
Model
Crossover
Masking
Open label
Primary purpose
Basic science

Study locations

Turkey (Türkiye) · 1 center
  • Istanbul Gelisim University — Istanbul

Identifiers

NCT: NCT07616804 · 2026/148

Primary sources (government registries)

View this study on ClinicalTrials.gov ↗