Running track breaks. Popov and Ryumin relied heavily on the running track and bicycle ergometer to maintain their fitness so they could return safely to Earth after their prolonged stay in weightlessness. On June 15 their running track broke, but the cosmonauts avoided repairing it for several days, because “it meant unscrewing a lot of bolts and would take a lot of time to repair.” However, doctors on the ground ordered them to increase their level of exercise, so they had to repair the track.,[1] Also at about this time, the cosmonauts repaired the Kaskad attitude control system, in the process expending a large amount of fuel.
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