It’s normally in the pop science articles that concentration starts bonking out around 40mins so I assume there are some studies backing that up. Personally I w

It’s normally in the pop science articles that concentration starts bonking out around 40mins so I assume there are some studies backing that up. Personally I would take 7 x 15 minute sessions per week over a single 1hr 45 minute session or an hour session and a separate 45 minute session.