[Effect of water-salt dietary supplements on tolerance to head-pelvis acceleration after 7 days of "dry" immersion and during normal motor activity].
The effect of water-salt supplements as an agent increasing human tolerance to head-to-feet acceleration with a slow onset was examined. The test subjects were rotated in a 7.25 m arm centrifuge after 7-day dry immersion or normal motor activity. The water-salt supplements were given at a dose of 0.15 g NaCl and 18 ml water per kg body weight (with the total daily dose consumed in four fractions). During immersion fluid retention was significantly higher than during normal activity (818 +/- 139.7 ml versus 478 +/- 69 ml). Water-salt supplements consumed produced a positive effect on tolerance to head-to-feet acceleration. During centrifugation after water-salt supplementation the physiological responses were less strained. Water-salt supplements taken on the last immersion day increased the tolerance level as compared to the control. The amount of the fluid retained in the body was found to be inversely proportional to the tolerance level. It is concluded that water-salt supplements may be recommended to increase tolerance to head-to-feet acceleration in aerospace medicine.
D000054:Acceleration / Q000009:adverse effects*; D000328:Adult; D002318:Cardiovascular Diseases / Q000517:prevention & control; D003681:Dehydration / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D007101:Immersion / Q000628:therapy; D008297:Male; D009068:Movement; D012965:Sodium Chloride / Q000627:therapeutic use*; D014867:Water / Q000627:therapeutic use*; D014893:Weightlessness / Q000009:adverse effects*
D014867:Water; D012965:Sodium Chloride
Vliianie vodno-solevykh dobavok k ratsionu pitaniia na perenosimost' peregruzok napravleniia golova--taz posle semisutochnoĭ "sukhoĭ" immersii i pri obychnom rezhime dvigatel'noĭ aktivnosti.