The six crewmembers aboard the International Space Station continued advanced space research today promoting health for humans on and off Earth. The crew will split up at the end of the week when the Expedition 62 trio undocks and returns to Earth.

Scientists are looking at how human muscles adapt to microgravity for the Myotones space biology study. NASA astronaut Chris Cassidy began the first of his four sessions for the human research experiment today. He marked muscle points on his skin then used a specialized device to measure his muscles’ biochemical properties. The research could prepare astronauts for longer space missions and help people on Earth with muscle conditions.

His two crewmates, Anatoly Ivanishin and Ivan Vagner, are getting used to life on the orbiting lab while maintaining Russian station hardware. The cosmonauts are deactivating communication systems in the new Soyuz MS-16 crew ship and getting up to speed on their complement of space research.

NASA Flight Engineers Jessica Meir and Andrew Morgan contributed to different experiments today as they complete their final week in space. Meir collected her saliva samples for microbial analysis then documented her thoughts about the station’s food menu. Morgan cleaned and closed out life science hardware that housed live mice that returned to Earth on the last SpaceX Dragon cargo mission.

The two astronauts are also getting ready to end their mission with Commander Oleg Skripochka and return to Earth on Friday. The trio is packing the Soyuz MS-15 crew ship with cargo and personal items. They will undock Thursday at 9:53 p.m. EDT and parachute to landing in Kazakhstan less than three-and-half hours later.