Doctor Answers (6) on Joint pain
In his age ask him to walk how much he can, any times in a day for 5mins each time.
When he is sitting in chair tell him to move his toes, ankle, leg in up and down motion. Slight neck movements. He can even stretch his body by lifting his hands.
Do not lie on same side. If he lie flat on back for 2hrs, try to lie another 2hrs in left and right sidelining alternatively.
While lying also he can do exercises by moving all joints like toes movement, ankle ( which is best exercise) folding knee, moving fingers, wrist, hand movements, he can deep breathing exercise on lying position.
Well as you are telling I presume that the joint pains he is suffering is age related...senile arthritis or probably osteoarthritis...but without examining I can't tell you the problem... I suggest you not to go for any extensive methods at this age...I would suggest you to go for physiotherapy...thank you