The Expedition 61 spacewalking team aboard the International Space Station is taking a light-duty day ahead of this weekend’s excursion. Meanwhile, the Russian space residents researched human biology and prepared for a crew departure early next month.

Astronauts Andrew Morgan and Luca Parmitano took it easy on Tuesday, relaxing before they begin a six-hour spacewalk on Saturday at 6:50 a.m. EST to repair a cosmic ray detector. The duo began organizing their spacewalk tools, custom-designed for the unique job, just after lunch today. NASA TV will start its live broadcast of the spacewalk at 5:30 a.m.

NASA Flight Engineers Jessica Meir and Christina Koch spent an hour today reviewing Canadarm2 robotics procedures they will use to assist Saturday’s spacewalkers. Meir and Koch also spent the majority of the day relaxing, having completed two spacewalks in less than a week on Monday.

The Russian duo, cosmonauts Alexander Skvortsov and Oleg Skripochka explored ways to maximize the effectiveness of space exercise. They also studied wearing and operating a specialized suit, the Lower Body Negative Pressure suit, which counteracts the upward flow of body fluids caused by microgravity.

Skvortsov is also packing the Soyuz MS-13 crew ship that will return him, Koch and Parmitano to Earth on Feb. 6. The trio will undock and parachute to a landing in Kazakhstan. Koch will have accumulated 328 consecutive days in space upon landing second only to U.S. astronaut Scott Kelly with 340 days.