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Clinical Trials/NCT04084535
NCT04084535CompletedNot Applicable

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

Centro Universitario La Salle1 site in 1 country16 target enrollmentStarted: September 16, 2019Last updated:
Conditions

Trial Snapshot

Phase
Not Applicable
Status
Completed
Sponsor
Enrollment
16
Locations
1
Primary Endpoint
Oxygen Saturation recovery

Study Overview

Brief Summary

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.

Detailed Description

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.

Study Design

Study Type
Interventional
Allocation
Randomized
Intervention Model
Crossover
Primary Purpose
Treatment
Masking
Single (Outcomes Assessor)

Eligibility Criteria

Ages
18 Years to 60 Years (Adult)
Sex
All
Accepts Healthy Volunteers
Yes

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

Outcomes

Primary Outcomes

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

  • Maximum Respiratory Pressures(Before and after training intervention (after 4 weeks))
  • Lung function (forced spirometry)(Before and after training intervention (after 4 weeks))
  • Lactic acid recovery(Before and after training intervention (after 4 weeks))
  • Heart Rate recovery(Before and after training intervention (after 4 weeks))

Investigators

Sponsor
Centro Universitario La Salle
Sponsor Class
Other
Responsible Party
Principal Investigator
Principal Investigator

Fran de Asís Fernández

Principal Investigator

Centro Universitario La Salle

Study Sites (1)

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