Most seniors never get enough exercise. So, in His wisdom, God decreed seniors would become forgetful so they would have to search for their glasses, keys and other misplaced items and move around more. And God looked down and saw this was good.
Then God saw there was yet another need. So God, in His wisdom, made seniors lose coordination so they would drop things, which would require them to bend and reach and stretch. And God looked down and saw this was good.
Then God considered the functioning of senior bladders and decided, in His wisdom, there should be calls of nature more frequently, requiring more walking to the relief station, which would burn calories. And God looked down and saw this was good.
Seniors were obliged to exercise more from these senior shortcomings and, as a result, did become more active. So if you find you are required to get up and down more as you age, remember it is God's will and in your best interest, even though you mutter under your breath.