They weaken
Astronauts' muscles atrophy in space due to the decreased work they do without Earth's gravity.
they become flabby and smaller.
When leg muscles are not used for an extended period, they can atrophy and weaken. This can lead to reduced muscle mass, strength, and endurance. It may also result in loss of flexibility and coordination in the muscles.
Atrophy
cardiovascular fitness
Everybody dies. That's it.
they weaken Because there is no gravity in space muscles go unused. Because of the lack of use they weaken and even begin to deteriorate. Astronauts must exercise for hours daily in order to maintain there strength.
That is lactic acid. This is what produces a "burning" feeling.
Leaving the oven on for an extended period of time can lead to overheating, potential fire hazards, and damage to the oven itself. It can also result in wasted energy and increased utility bills.
If it wasn't pressurised there would be no air and the astronauts would die. Of course they could keep their spacesuits on but that would not be comfortable for an extended period of time.
They get caught in the storm and end up on the island for an extended period of time.
Focusing your eyes on the paper for an extended period of time can strain your optic muscles and nerves, causing headaches or soreness of the head.