Nielsen O B, Clausen T
Department of Physiology, University of Aarhus, Denmark.
Exerc Sport Sci Rev. 2000 Oct;28(4):159-64.
In skeletal muscle, the concentration of Na+/K(+)-pumps is high and increases through training. In isolated muscles, contractile endurance depends in part on Na+/K(+)-pump concentration. Exercise leads to rundown of Na+/K(+)-gradients, compound action potentials, and force. Early and efficient activation of the Na+/K(+)-pump, however, protects excitability and contractility.
在骨骼肌中，Na+/K(+)泵的浓度很高，并且通过训练会增加。在分离的肌肉中，收缩耐力部分取决于Na+/K(+)泵的浓度。运动导致Na+/K(+)梯度、复合动作电位和力量的降低。然而，Na+/K(+)泵的早期有效激活可保护兴奋性和收缩性。
