Schools in Canada have kids work an exercise bike to get their heart rate up before class which helped eliminate disruptive behavior and being unable to concentrate on lessons. I tried it on myself in the morning before working through texts, definitely works.

Now I have an elaborate spin bike setup, large TV playing lectures and a bluetooth headset to hear them. I ride the bike for the entire lecture, usually 45mins-1hr15mins, and recently incorporated interval training so whenever a student in the recorded lecture asks a question, it's always one that could have been answered by reading the assigned material beforehand like the student is supposed to do, so I go as hard as possible on the bike until the professor returns to the lecture. After I have no problems concentrating for another hour or so on the assigned reading or trying the proofs in the lecture notes whereas before I as always fidgety sitting for so long during a lecture not wanting to spend yet more time staring at proofs.

I also agree with the other poster exercise usually doesn't equate weight loss since I didn't lose any weight until I started making my own food and avoiding all the takeout junk I was eating. Like everybody else I overestimated the amount of calories burned so feasted on huge pasta dishes and baguette sandwiches.

Morning exercise specifically? How about lunch?

Lunch works too, but the earlier and the harder the better.