Majority of older generation fail to enter in regular exercise. From my point of view, there are two main problems of lack of elderly people to engage in exercise, feeling lonely and fear to start.
First issue is feeling lonely when older people do exercises. Elders who train at home may feel lonely, because majority of older generation live alone or with their couple. Solving this problem is not a such a big deal, they should find a club and do train outside, for example they could go to the fitness club or yoga with their peers or they also can find a lot friends. To encourage them to do more exercise a fitness clubs can make a discount for individuals who older than fifty and make a banners because, elders do not uses smartphone a lot.
Second problem is fear to start ,moreover majority of elders may not know how to make some exercises or do not know about train at all. Solve is to make them more awareness about train and exercise by making a journals or having a special trainer in fitness club who helps specially to older figures. For example, the fitness club where I go has special stuff for them,they helps to do exercises correctly and give some advices about nutrition.
In conclusion, many elderly figures fail in exercise, however solve it very easy by helping them to understand the techniques and make them more happy.