My muscle shake whenever i use them slowly. instead of smooth movements, i feel them almost pulse with contractions and releases. i have been to a neuro and i got cleared, but it's still annoying. i am very out of shape, could it just be due to that?

What did the neurologist do to “clear” this? You may need some neurologic testing to find out what the cause of this is if it does not improve with exercise. If it is improving with exercise, then it may be due to muscle weakness and, as you exercise and your muscles get stronger, it will happen less. If it is not improving with strengthening exercises, then perhaps see a different neurologist.