Exercise and Repetitive Diving

April 16, 2014 updated by: Zeljko Dujic, University Hospital of Split

The Impact of Predive Exercise on Repetitive SCUBA Diving

SCUBA diving frequently involves repetitive exposures over multiple days. The goal of this study was to see how exercise impacts microparticles (MPs), endothelial function, and venous gas emboli (VGE) over a series of dives.

16 divers in 2 groups each completed 6 dives. One group completed 3 control dives followed by 5 days rest then 3 dives preceded by exercise. The other group completed the opposite protocol. Flow-mediated dilation (FMD) data and blood for MP analysis was collected before and after each dive. VGE were monitored via transthoracic echocardiography 30, 60, and 90 min after surfacing. Exercise before diving consisted of 60 min running outdoors including 8x4 min intervals at 90% VO2max effort.

Study Overview

Study Type

Interventional

Enrollment (Actual)

16

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Split, Croatia, 21000
        • University of Split School of Medicine
    • Maryland
      • Baltimore, Maryland, United States, 21201
        • University of Maryland

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Certified SCUBA diver
  • Certified to dive by experienced Medical evaluator
  • Must be able to run continuously for 45 min

Exclusion Criteria:

  • Prior diagnosis of decompression sickness

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Control dives 1st
Subjects in this group complete the first 3 dives as control dives and the second 3 dives preceded by aerobic exercise
60 min of aerobic intervals completed prior to SCUBA diving
Experimental: Predive exercise 1st
Subjects complete the first 3 dives preceded by the intervention of aerobic exercise and the second 3 with no exercise as control dives
60 min of aerobic intervals completed prior to SCUBA diving

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in circulating microparticle counts
Time Frame: 2 weeks
Change in circulating microparticle counts measured pre and post SCUBA diving following 6 dives spaced over 12 days
2 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

October 1, 2013

Primary Completion (Actual)

November 1, 2013

Study Completion (Actual)

January 1, 2014

Study Registration Dates

First Submitted

April 16, 2014

First Submitted That Met QC Criteria

April 16, 2014

First Posted (Estimate)

April 21, 2014

Study Record Updates

Last Update Posted (Estimate)

April 21, 2014

Last Update Submitted That Met QC Criteria

April 16, 2014

Last Verified

April 1, 2014

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 264816-02

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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