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I had just done a quick search and got little more than papers on how exercise is good for older women.
Like I didn't know that?
I'll look for Dave Scott. I'd be interested in how your current program differs though. I am starting to despair of a coach that really "gets it."
Not sure if this is the same situation for you but for me, it's not the over-40 thing as much as the with-children thing that makes a difference. Before doing duathlons, I was training with a local running group with median age probably 45 but they were mostly single, divorced, no kids or grown kids. They could do a lot more group training and volume of training than I could do as a married with 2 kids under 10 person.
Now I work one-on-one with a coach who is 40 and who is a single dad who gave up pro level triathlon racing so that he could be a 50% time dad instead of just every other weekend. He totally "gets" the time constraints. My training plan is totally written around my life and what is do-able as opposed to me trying to do a volume that is just not realistic. I was just saying to him today how exciting it is that every year my kids get a year older and a year more independent, I will be able to add a bit more intensity and volume to my plate.
I don't beat myself up for not being able to do the volume of training that that the 25 year-olds with a 9-5 job and no spouse or kids, can manage.
I sure miss the Sat and Sun afternoon naps that my husband and I used to have every weekend prior to kids though!!!