You may think you know the cause of a problem, but it may be the result of something else. The body makes compensations to get you through daily life. Fatigues the muscles means the muscles weakens to the point where it can't fully support the load that's being put on it. When a muscle fatigues , it actually shortens. Healthy stretching re-educates muscles, returning them to proper length.
Range of motion is a way of measuring the flexibility of the joint.
If you can't move around the joint in a free, unobstructed manner, you have a limited range of motion and have a feeling of tightness. Healthy stretching is designed to restore the normally expected range of motion. Stretching balance is the desired result of healthy stretching. We want the muscles on both sides of the body to be of equal length so that the body is not forced to compensate, leading to injuries. F eeling looser after taking a shower is a result of warmed blood from the surface being recirculated into your body raising your core or inner temperature.