Skip to main content
OpenTrials
Completed

NCT Number: NCT04084535

Effects of High Intensity Interval Training (HIIT) vs. Inspiratory Muscle Training on the Recovery After a Maximal Apnea.

The aim of this randomized cross-over controlled study was to assess the effects of an 4-week exercise program on the recovery capacity after a voluntary maximal apnea. Participants will be randomly allocated to receive either a high intensity interval training (HIIT), or an inspiratory muscle training (IMT) using an inspiratory resistance device.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Exercise Training Apnea High-Intensity Interval Training Pathological Conditions, Signs and Symptoms Respiration Disorders Respiratory Muscle Training Respiratory Tract Diseases Signs and Symptoms Signs and Symptoms, Respiratory

Age range

18 year–60 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Madrid FREEDIVERS association

Madrid, Spain

About this study

It is a multi-center study. 3 different Spanish Freedivers Centres are included in the study (Madrid, Zaragoza, and Barcelona).

For each participant, exercise program started with one or the other program. Hence, both interventions were applied once with the participant randomly allocated to receive the same intervention. The trial included four study visits. Each exercise training program will be applied sessions per week during 4 weeks. Participants received baseline assessments at the beginning of nay intervention, and post-intervention assessments at the end of the fourth week. The wash-out period will be two weeks. After these two weeks participants switched intervention.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Absence of pain or illness
  • No changes in cognitive ability
  • Over 18 years old.
  • Member of the Spanish Federation of Underwater Activities.
  • Positive medical examination that allows the diver to practice voluntary apnea.

Exclusion criteria

  • People with systemic diseases, tumors, infections, pacemakers, history of epilepsy, hydrophobia, pregnancy women, pharmacological treatment.
  • To be participating in other physical activities during the experimental research

Treatment and study plan

High Intensity Interval Training

Other

Participants will perform 3 HIIT sessions per week, involving 10 min of intense exercise within a time commitment of 30 min per session, including warm-up, recovery between intervals and cool down.

Inspiratory Muscle Training

Other

Participants will perform 3 inspiratory resistance training sessions per week, involving 30 min per session, including warm-up, recovery between intervals

Primary outcomes

  1. Oxygen Saturation recovery

    Time frame: Before and after training intervention (after 4 weeks)

    Oxygen Saturation recovery will be record by the experimenters every 5 seconds by a handheld pulse-oximeter during the 1 min recovery time after a maximal dynamic apnea. The outcome represents the time it takes to get a 95% of saturation during these 1 minute.

Secondary outcomes

  1. Lung function (forced spirometry)

    Time frame: Before and after training intervention (after 4 weeks)

    The Spirometry will be perform according to American Thoracic Society criteria and was measured in litres. The maneuver will be perform 3 times and recording the best one.

  2. Maximum Respiratory Pressures

    Time frame: Before and after training intervention (after 4 weeks)

    The maximum respiratory pressures (MIP and MEP) will be measure with a device. This device applies an inspiratory/expiratory load which provides a resistance. The maneuver will be perform in a sitting position. Measuring a minimum of 3 times will be perform, recording the highest value.

  3. Lactic acid recovery

    Time frame: Before and after training intervention (after 4 weeks)

    The level of lactic acid in the blood will be measure by a device that used a blood lactic acid measurement that you've gotten by the finger-stick method. It will be record by the experimenters 3 times: immediately after the maximal dynamic apnea, after 3 min and after 10 min of the maximal dynamic apnea.

  4. Heart Rate recovery

    Time frame: Before and after training intervention (after 4 weeks)

    Heart Rate will be record by the experimenters every 5 seconds by a handheld pulse-oximeter during the 1 min recovery time after a maximal dynamic apnea. The outcome represents how long does it take before the participant periodic Heart Rate is stabilized during these 1 minute.

Sponsors and collaborators

Lead sponsor

Centro Universitario La Salle

Other

Registry information

Official study title

Effects of Inspiratory Muscle Training vs. High Intensity Interval Training Program on the Recovery Capacity After a Maximal Dynamic Apnea in Breath-hold Divers. A Randomized Crossover Trial

Acronym: (HIIT)

Important dates

Study start
2019
Primary completion
2019
Study completion
2019
First posted
Sep 10, 2019
Registry last updated
Dec 6, 2019

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.