In my case I bike in the summer (1150 km this last summer) , I cut brush and deadfalls in our snowmobile trail network in the fall and try to snowshoe 1-2 hours three or four times a week. As far as the modelling, I use a special pair of glasses the optometrist made me for that purpose, I need to use pliers to open several of my paint jars, I seem to spend a lot of time on all fours under the table looking for something, I knock a lot of stuff over reaching for something else, I never remember from which supplier I bought stuff from but I'm having a lot of fun. I'm 66.