[Diving profiles and work loads of fishermen's "Oikomi Gyoho" diving].
Diving profiles of fishermen divers in the Izu Islands were investigated and recorded by DDR (Diving Data Recorder). Consumed air volume during diving work was also checked in each dive and the work load was measured by VO2 during diving. It was recognized that divers repeatedly experienced extreme descents and ascents, that were accompanied by increases of oxygen consumption. This suggested that the load of their work was far beyond that of sports divers. The particular diving method used, called the "Oikomi Gyoho method" is to repeatedly dive several times to catch fish. Each bottom (diving) time is rather short and the dept changes from deeper to shallower areas gradually. This profile is considered to be a safe diving method for the prevention of DCS (Decompression Sickness). However, stopping for decompression during ascent is sometimes required to prevent DCS according to analysis of the diving profiles. It is pointed out that the risk of DCS still remains with this diving method.
Shibayama
M
M
Mano
Y
Y
D003665:Decompression Sickness / Q000209:etiology; D004242:Diving; D005398:Fisheries; D006801:Humans; D010101:Oxygen Consumption; D012119:Respiration