Energy Balance in Saturation Diving.
Abstract
Since previous saturation dives have caused loss of body weight despite apparently adequate to high food intake, a complete study of energy balance was undertaken during the saturation dive called Hana Kai II. Over a 30-day period in the hyperbaric chamber (3 days of predive control, 1 day of compression, 16 days at 18.6 ATA, 7 days of decompression, and 3 days of postdive control), all food, urine, and feces for five men were analyzed by bomb calorimetry; 24-hour energy expenditure (M) was measured from continuous V(O2), V(CO2), and urine N; body weight was taken daily; body composition was assessed from density, total body water, and skinfold thickness. Food intake was high throughout the 30 days, about 3500 kcal/day, while fecal and urinary losses were a normal 6-8% of intake; M was increased a little by the hyperbaric condition, but averaged only 2431 kcal/day for the 30 days, yet there was an average loss of adipose tissue of 0.8 kg. Nitrogen balance was positive.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 20, 1976
- Accession Number
- ADA041834
Entities
People
- J. R. Dwyer
- P. Webbs
- S. J. Troutman Jr.
- V. Frattali
- Y. Ohta