Related Experiment Video
Updated: Jun 11, 2025

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
Published on: January 28, 2020
Higher proportion of prematurely born adults in elite breath-hold divers
Hadrien Pique1, Sigrid Theunissen1, Costantino Balestra2,1,3,4,5
1Environmental, Occupational, Aging (Integrative) Physiology Laboratory, Haute Ecole Bruxelles-Brabant (HE2B), 1160 Brussels.
Insights
Elite freedivers born prematurely are more common than in the general population. However, prematurity does not affect their performance in freediving. Keywords: preterm birth, elite freedivers, freediving performance.
Area of Science:
- Physiology
- Sports Science
- Neonatology
Background:
- Preterm birth can impact respiratory system development and lead to lifelong health issues.
- Prematurity is linked to altered hypercapnic reactions in adults, potentially affecting breath-hold activities.
- Understanding these effects is crucial for athletes born prematurely.
Purpose of the Study:
- To investigate the prevalence of preterm birth among elite freedivers.
- To compare freediving performance between elite athletes born prematurely and those born full-term.
Main Methods:
- Utilized AIDA International's top-100 freediving athlete rankings (2016-2021).
- Collected data via a custom-developed subject questionnaire.
- Analyzed personal best freediving results and birth status.
Main Results:
- 17.1% of elite freedivers in the sample (n=25) were born prematurely, exceeding the general population rate.
- The proportion of premature births was 18.1% for females and 16.2% for males.
- No significant difference in freediving performance was found between preterm and full-term elite freedivers.
Conclusions:
- The prevalence of preterm birth is elevated among elite freedivers compared to the general population.
- Despite higher prevalence, preterm birth does not appear to impact the athletic performance of elite freedivers.
Introduction:
Preterm birth may significantly impair the functional and anatomical development of the respiratory system and could be a background for various life-long medical sequelae. Prematurity has been recently connected to changes in hypercapnic reactions at adult age. Altered reactions to pCO2 in premature-born subjects may impact breath-hold underwater exercises (freediving) results.
Methods:
AIDA International provided the list of top-100 rankings freediving athletes for the years 2016- 2021 with their personal best results. Data was collected using a subject questionnaire developed for the study (subject-reporting outcomes).
Period Of Data Collection:
March 2022 to June 2022.
Results:
Within the sample of divers (n=146), 17.1% (n=25) were born prematurely. 13.7% (n=20) were moderate to late preterm, and 3.4% (n=6) were very preterm. The proportion of the athletes whose birth was premature was 18.1% for females and 16.2% for males. These figures are higher than the standardized estimated mean of the preterm birth rate of 8.5% calculated based on the geographical distribution of our sample. There was no difference in best personal results in freediving between the preterm and full-term elite freedivers.
Conclusions:
The proportion of preterm within the elite freedivers is higher than could be estimated for the general population. There is no difference in best personal results between preterm and full-term elite freedivers.
Related Concept Videos
Breathing
Alterations in Respiration II
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes...
Mechanism of Breathing III: The Accessory Muscles
The respiratory system is a complex network that relies on primary respiratory muscles like the diaphragm, but also involves accessory muscles to enhance lung expansion and airflow during both inhalation and exhalation.
Enhancing Inhalation with Accessory Muscles:
Accessory muscles such as the sternocleidomastoid, scalene, intercostal, and abdominal muscles are crucial when additional respiratory effort is required, such as during deep...
Other Factors Affecting Respiration Centers
However, the ability to hold one's breath voluntarily is not limitless. When the CO2 concentration in the blood reaches a critical...
Physical Assessment of the Respiratory Tract II: Inspection
Chest Configuration
The chest configuration...
Factors Affecting Respiration

