I live in norway. Yesterday there was a artivcle in one of norways biggest newspapers.
Some scientists from NTNU(a university in norway) claims to have found the perfect workout. They claim that short workouts with maxsimum effort is way better than long and painfull workouts.

The article seems to be focusing on fitness workout. "The only way to improve the body and the healty is to increase the intensity on the training" Jan Hoff(a scientist from NTNU)
This training is supposed to improve endurance and fat burning. It doesn't say anything about maxsimum strength.

Here is the experiment. They used to groups of people. the first group did a long workout 3 times a week. the second group did a short but intens workout 3 times a week(Intervall training) the group that did short and intense workouts improved endurance more than the people that did long workouts.

"The best thing you can do is to train at maxsimum intensity in 4 minutes and then relax 4 minutes"

"lack of intensity can't be replaced with long workouts"

"It is important with some long distanse running if you want to build up over a longer periode"