I'll be reading the article when I have time later today.

But for an initial response: For myself, 60 minutes in total in 1 day, nearly daily does manage my current healthy weight. When it's half the amount of exercise weekly and I don't cut back on calories, then I do gain weight.

So how can one do this: bike commute to work /groceries --at the very least for me. Plus add on at least 3-4 more hours of cycling on weekends.

Yea, if I really thought about the effort, it would be slightly discouraging....except we all love cycling don't we?