Ventilatory regulation to exercise in breath hold divers

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00004659

Enrollment

Registered

2013-01-24

Start date

2013-01-26

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy volunteers: Sports scientific research on breath hold divers

Interventions

Group 1: Breath hold divers, at least 4x/month apnea training

three spiroergometries with intra-breath breathing gase analyses, lactate measurements and blood gase analyses will be performed, cooling of the eyes` area with three different temperatures. Group 2:

three spiroergometries with intra-breath breathing gase analyses, lactate measurements and blood gase analyses will be performed, cooling of the eyes` area with three different temperatures.

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: Breath hold diver: at least 4 times per month breath hold diving training. Healthy non-diving subjects.

Exclusion criteria

Exclusion criteria: respiratory deseases, cardial or neuromuscular or HNO comorbidities

Design outcomes

Primary

Measure	Time frame
Difference of PaCO2 in blood gase analysis at respiratory compensation point between groups	—

Secondary

Measure	Time frame
• Difference of PaCO2 in blood gase analysis at respiratory compensation point in the breath hold diving group between different temperatures • Intra-breath-Analyses of ventilatory parameteres • lactate concentrations • heart frequencies	—

Countries

Germany

Contacts

Public ContactTobias Scholz

Universitätsklinikum Freiburg Abteilung Pneumologie

tobias.scholz@uniklinik-freiburg.de076127037070

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026