Effects of Hook Maneuver on Oxygen Saturation Recovery After -40 m Apnea Dive-A Randomized Crossover Trial.

ABSTRACT: To reduce the risk of syncope, trained breath-hold divers (BHDs) use a specialized breathing technique after surfacing called "hook breathing" (HB). It consists of a full inspiration followed by a Valsalva-like maneuver and with subsequent exhalation performed against resistance to generate continuous positive airway pressure during exhalation. This study analyzed the influence of HB on oxygen saturation recovery after a -40 m depth apnea dive in trained BHDs. Thirteen BHDs performed two dives to -40 m at different days, one followed by HB after a dive and the other using usual breathing (UB). To detect signs of lung edema, ultrasound B-line measurements were conducted before, 10 min after the dive, and within 1 h after the dive. To detect oxygen saturation recovery, pulse oximetry was rec

SUBMITTER: DeAsis-Fernandez F 

PROVIDER: S-EPMC11768466 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature