Astronauts' muscles atrophy in space due to the decreased work they do without Earth's gravity.
They weaken
In space, astronauts experience muscle atrophy due to the microgravity environment, which reduces the mechanical load on their muscles. Without the need to support their body weight, muscles can weaken and shrink, leading to a decrease in strength and endurance. To combat this, astronauts engage in regular resistance and aerobic exercise while aboard the International Space Station to help maintain muscle mass and overall fitness. Despite these efforts, some muscle loss still occurs during extended missions.
after a long period of exercise a muscle can cramp
they become flabby and smaller.
Everybody dies. That's it.
They atrophy
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.
Muscle 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.