breath-hold

breath-hold

voluntary suppression of breathing movements. The breath-hold time is very variable between subjects and conditions. Starting from full lung volume, breathing air, less than one minute is usual, but longer after hyperventilation or after breathing oxygen. Although the unsuppressible stimulus to breathe at break-point is related to rising carbon dioxide and falling oxygen in the blood, interaction with other factors is complex, involving central respiratory rhythm, afferents from the diaphragm and decreasing lung volume. See also diving.
References in periodicals archive ?
According to Turbo, spearos (people who spearfish) need to learn breath-hold techniques, fish hunting techniques, equipment, shark behaviour, safe diving practices and even etiquette.
Set to highlight regional and international talent within the freedive spearfishing community, the championship tested contestants' ability to accurately use a speargun in a swimming pool while freediving on a breath-hold.
During the last century, advances in diving techniques and equipment have made breath-hold and equipped dives more common among people who want to explore the underwater environment.
Freediving, breath-hold diving, or skin diving is a form of underwater diving that relies on the ability to hold their breath until resurfacing, rather than on the use of a breathing apparatus such as scuba gear.
2-5) Several techniques have been employed to help mitigate the effects of respiratory motion, including breath-hold compatible acquisitions, (2, 3, 6) external bellows for respiratory monitoring, (7) and navigator triggering.
During the breath-hold, it takes a significant amount of time for the CO2 to return to the normal level then to rise to the point where it stimulates breathing.
Barwood MJ, Dalzell J, Datta AK (2006) Breath-hold performance during cold water immersion: effects of psychological skills training.
The physiologic mechanism by which breath-hold blackout drownings occur is well-understood (5).
Thus, scanning time will probably be less than that of axial DW-MRI, an advantageous feature, particularly for breath-hold DW-MRI.
54 minutes for the longest breath-hold under water was ratified by the Guinness World Records on Friday.
A daredevilCediver is dropping into Dubai hoping to earn Dhs10,000 for every minute without a gulp of air as he attempts to break the Guinness World Record for the longest breath-hold underwater.
Fazza Freediving Champion, Branko Petrovic, will attempt to break the Guinness World Record for the longest breath-hold underwater also known as static apnea next month.