Not an expert...... I repeat.... Not an expert..... however....
The way I see it in the simplest terms.... if Normal intensity stretching brings +10% as a base.... getting less than that is a sign of less than optimal training.... getting more than 10% is a sign of high train-ability....
Of course you can extrapolate that to Cardio and Sim Game.....
Newark City
Season 1 - 4th Place.... but hey....