In the gym, just like an astronaut
Since we are talking about space training, how about trying the sensation of training like an astronaut? Then you should try Pilates Full Teaser, a useful exercise to strengthen your upper body: lying on your stomach up on a mat, holding your legs up at an angle of 45 degrees, you have to try to touch the tips of your feet with your hands with extremely slow and controlled repetitions. Obviously, all the exercises to strengthen the abdominals, from crunches to more complex ones, and all the various types of pushups are part of the training.
The most surprising thing, however, is the role kettlebell has, a tool widely used in space training. The most frequent exercise is to swing a kettlebell between the legs until it is raised to the height of the chest, holding it with both hands. According to experts this would be the most comprehensive exercise if you want to strengthen bone density, balance, strength and your body as a whole.