Training

On the training page, there is a meter next to the cone symbol. What does this show? It's not training speed, energy or morale...
Star rating
It's not star rating
It's the training progress. The player earn a training point when the bar is fulfilled.
What is the difference between the 3 training types? There's no explanation of the benefits if any.
The amount of training points earned during a training depends of its duration.
Your players will earn as much training points by doing 1 time the 2h training or 4 times tue 30min training.

But the 2h training consumes 5 times more energy than the 30min one.
This detail, the difference between the 3 trainings, should be made more clear on the training screen, please. Been wondering since I started playing! Of course, now that I've upgraded my infirmary and recruited strategically, this does mean I'll be needing to log in less frequently over the course of the day...