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Effects of Breath-Hold vs Standard Interval Training on Fitness in Mountaineers

NCT07703839 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 24

Last updated 2026-07-20

No results posted yet for this study

Summary

This study investigated whether adding structured breath-holds to standard interval training improves cardiorespiratory fitness in recreational mountaineers more than interval training alone. Twenty-four male recreational mountaineers participated in an 8-week progressive treadmill interval training program. Participants were divided into two groups: a controlled-breathing group that performed structured mid-tidal breath-holds during training, and a free-breathing group that maintained unrestricted breathing. The primary outcomes measured were resting heart rate and estimated maximal oxygen uptake, along with secondary measures including blood pressure and pulmonary function indices. The study aimed to determine if this mild voluntary hypoventilation technique provides additional physiological benefits for altitude preparation.

Conditions

  • Healthy Volunteers

Interventions

BEHAVIORAL

Voluntary Hypoventilation Training

A breathing maneuver consisting of structured mid-tidal breath-holds synchronized to an electronic metronome to induce mild voluntary hypoventilation (target SpO₂ nadir 92-94%) during physical exertion.

BEHAVIORAL

Progressive Treadmill Interval Training

A cardiovascular exercise protocol involving supervised treadmill sessions with progressive increases in intensity (65-85% heart rate reserve) and duration (30-45 minutes) over an 8-week period.

Sponsors & Collaborators

  • Mountaineering and Sport Climbing Federation of Sistan and Baluchestan Province

    collaborator UNKNOWN

  • General Directorate of Sports and Youth of Sistan and Baluchestan Province

    collaborator UNKNOWN

  • Mohammadreza Rezaeipour, MD, PhD

    lead OTHER

Principal Investigators

  • Mohammadreza Rezaeipour, MD, PhD · University of Sistan and Baluchestan

Study Design

Allocation
NON_RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
25 Years
Max Age
35 Years
Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2023-09-30
Primary Completion
2023-11-30
Completion
2023-11-30

Countries

  • Iran

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07703839 on ClinicalTrials.gov