I am a runner. I train at what is probably the 80th percentile for longer distances, so I am by no means an expert. But I do understand that if you are running 7 miles a week, most of the time, your body isn’t going to be that beat up, especially if you are taking it slow.
However, the cardio should help. With overall health that is, not whatever blown knee or hip or whatever he'll have to deal with later.
Despite decades of intense propaganda, killings of people in uprisings and the methods of Stasi as described in the article.
Even with all that effort most people didn't believe in the regime.
So it's hard to say whether the Stasi's tactics worked. Only people in the regimes like Ceausescu and Honecker actually thought people liked it. And perhaps not even them.
She has good things to say about him in the end, from the evidence of his actual behaviour, like doing education outreach and loving his wife.
I would also argue self-marketing is important when you have lazy or bad managers.