They fall back on reserves of muscle protein to balance the high rate of heat loss - and still cannot find sufficient food.

This was done on the basis of studies of muscle proteins and enzymes.

The muscle proteins and fibers that develop the force diminish.

When that happens, doctors may use a blood test that measures a muscle protein in the blood.

During the summer period, bears take advantage of the nutrition availability and accumulate muscle protein.

This mineral supposedly prevents muscle protein from breaking down during exercise.

The kidney removes the muscle protein from the blood.

This can happen by an increase in the muscle proteins, or through enhanced storage of glycogen in muscles.

During this process, the salt dissolves the muscle proteins, which helps to suspend the fat molecules.

Initially, weight reduction comes mostly from the loss of water and the breakdown of muscle protein, not fat.