1. Department of KinesiologyUniversity of CaliforniaLos AngelesCalifornia90024‐1568USA
2. Biodynamics LaboratoryUniversity of WisconsinMadisonWisconsin53706USA
3. Space Physiology BranchNASA‐Ames Research CenterMoffett FieldCalifornia94035USA
4. Institute of Biomedical ProblemsUSSR Ministry of HealthMoscowUSSR