Welcome to the golden years.  You are in the midst of a fight with the age curve.  Every year you will become weaker and more debilitated.  Only a scheduled exercise program can help to maintain your fitness level.  It may not be feasible for you to perform squats or an overhead press anymore; however it is important that you maintain your independence. Older populations should train for power.  If you lose your power, you won’t be able to get out of a chair or get up from the ground; you