Exercising as we age

As the years fly by 'like (the pickets in) a picket fence', we realise more and more that we should exercise to guard against undue weight-gain. How to make a point of doing it is the challenge! Could 'motivation' be singled out as the aspect lacking? Do we really care all that much if we are a few kilos heavier than is advised, even though we know that we may be placing too much strain on the heart - and other organs? Chances are we don't! On a practical level, we might shy off walking (e.g.) because we feel our creaky joints could fail to cope, or perhaps that the ticker won't be equal to the exertion. Walking and fitness clubs are excellent outfits as long as the knees/hips don't give out on us. What's the option, other than forgetting all about it? Eat, and drink, less? Then maybe we won't have the energy to get through the day. "All things in moderation" comes to mind and that could be at the back of our thought process concerning exercise - we simply feel we get enough activity on an average day without force-feeding things. Exercising can be quite boring anyway, although it usually includes some good socialising. All rather grim stuff but comes to the forefront of the mind every time we step onto the scales, and sometimes in between as well. "Body Mass Index" is a useful guide but its only something invented by some committee!