This often leads to poor nutrition. The muscular system declines; coordination and response time are not as they once were. A loss of calcium causes the bones to soften. The joints cannot tolerate long periods of friction.
齒牙動搖，嗅覺、舌頭味蕾的退化，使得老年人食慾下降，常因此導致營養不良；而肌肉系統耐力減低，協調力與反應速度都大不如從前；鈣質流失使得骨質疏鬆；至於全身關節不堪長期磨損，也逐漸僵硬、酸痛。