They get sore and start using energy from other places but soon they will stop all together if they are not getting the proper amount of oxygen.
you will get sick Gain weight, tiredness, weakness, sore muscles, bleeding gums
When muscles don't receive enough oxygen, they can't produce enough energy through aerobic respiration. This can lead to a buildup of lactic acid, causing muscle fatigue and cramping. In severe cases, lack of oxygen can result in muscle cell damage and necrosis.
you get rabies
you will feel cold and you wont have enough energy
you die.
your blood cells will be weak and you will be sick.
they begin to die, for example if you dont get enough air what will happen to you?
Scurvy, among other health problems.
you become to skinny but DONT die and but get sick
Over time your bones will become fragile.
no they dont... animals have muscles
If you dont give muscles time to repair. They will take more and more time to recover. That means if you are trying to Bench Press Monday and Tuesday you wont be able to bench very well for possibly a week. Your muscles need rest in order to get any positive increases in strength and mass.