In this era of specialization, did you know that there are specific weight bearing exercises now recommended for people specifically to combat osteoporosis? It is now recommended to vary the weight bearing and lift weights with only one hand at a time (seems that the body gets used to the symmetry and will strengthen the core better if the asymmetrical method is used), to use two weights together to work on grip (a noted problem with aging is the inability to open jars or pillboxes), to experience "hard landings" so there is stress added to the hip joints (a bit out of the ordinary from the message that impact is bad....seems now that SOME impact is good and the elliptical is not all the older exerciser needs).

The other item is that any exercise is good exercise, even if done in shorter stints. So exercising 10 times a day for 3 minutes is almost as good as exercising for 30 minutes in one straight blitz. So, don't think that because you do exercise and have a routine that you won't have to learn new tricks as you age.

How does this relate to marketing a product or service?  You have to really understand what it is you are selling and to whom, and change the message or the delivery method as the targets changes and evolves. Plus, like the 3 minutes 10 times a day, the importance is in just doing it. In marketing it is communicating what it is you want the target to know, in a variety of ways, over time.