Addiction to nitrogen narcosis
- Thread starter Richard Dayan
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The abstract from:
January 2004International Journal of Sport Psychology 35(1):1-12
To investigate the endocrine response (ACTH and beta-endorphin) to scuba diving in the open sea, in individuals with different levels of training. Materials and methods: Samples of blood and urine were obtained from two groups of divers: El (n=6) had over 4 years' experience, with frequent dives below 35 m; E2 (n=6) had 3 years' experience or less and had not dived below 15 m. A sedentary control group (n=11), who did not practice sports, was evaluated to establish basal measurements. The test consisted of submersion in the open sea to a depth of 25m (3.5 ATA). Results: In E1, there was a presubmersion increase in plasma levels of ACTH and beta-endorphin (p<0.05) and a significant decrease after the lest. In E2, levels of these hormones were significantly higher after submersion (p<0.05). Discussion: These changes are related to an anticipation phenomenon in the El group, in which adaptive mechanisms to hyperbaric submersion come into play, due to their greater experience than the E2 group. The submersion itself did not present an additional stimulus for the members of the El group, which explains the fall in hormone levels observed after the test.
January 2004International Journal of Sport Psychology 35(1):1-12
To investigate the endocrine response (ACTH and beta-endorphin) to scuba diving in the open sea, in individuals with different levels of training. Materials and methods: Samples of blood and urine were obtained from two groups of divers: El (n=6) had over 4 years' experience, with frequent dives below 35 m; E2 (n=6) had 3 years' experience or less and had not dived below 15 m. A sedentary control group (n=11), who did not practice sports, was evaluated to establish basal measurements. The test consisted of submersion in the open sea to a depth of 25m (3.5 ATA). Results: In E1, there was a presubmersion increase in plasma levels of ACTH and beta-endorphin (p<0.05) and a significant decrease after the lest. In E2, levels of these hormones were significantly higher after submersion (p<0.05). Discussion: These changes are related to an anticipation phenomenon in the El group, in which adaptive mechanisms to hyperbaric submersion come into play, due to their greater experience than the E2 group. The submersion itself did not present an additional stimulus for the members of the El group, which explains the fall in hormone levels observed after the test.
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