[1] The Soyuz spacecraft brought two visiting crew members to the Salyut 6 space station, one of whom was an Intercosmos cosmonaut from Cuba.

They also collaborated with the Cuban Institute of Endocrinology and Metabolic Diseases to examine blood and urine samples throughout the entire launch, stay, and return to explore the psychological stress from preparation and working long hours under constant weightlessness.

Tests had been carried out in previous flights and were repeated during this mission using a Chibis suit, a below-the-waist reduced-pressure device.

[2] The other experiments attempted to study how cell division, the immune system, concentrations of antibodies and other proteins and minerals were affected after prolonged exposure to a weightless environment.

This included measurements into the amount and rate at which humans lost water, fat, and other minerals.The cosmonauts also studied the growth of a single crystal of sucrose in the same environment.