They can live for as long as five years. The young are born hairless and helpless, and their eyes do not open until about 18 days after birth. They typically become sexually mature after the end of their first hibernation.hey can live for as long as five years. The young are born hairless and helpless, and their eyes do not open until about 18 days after birth. They typically become sexually mature after the end of their first hibernation.
A muscle knot is the lay term for what are also known as trigger points, sometimes abbreviated as TrP. These are sensitive points all over your body, but mostly on the back and neck that are particularly sensitive to irritation.
What Is Muscle Stiffness? Muscle stiffness is a condition in which muscles feel tight and contracted rather than the usual supple state of muscles at rest. Itâs also called stiff muscles, rigidity, and in severe cases, spasticity. Muscle stiffness is a feeling of tension and contraction in the muscles. In other words, your muscles feel like they are always flexed. This stiffness may limit your normal range of motion. Sometimes muscles feel stiff after periods of vigorous use like athletic activities, physical labor, or weight lifting.