I'm trying to finish a bit of Al's research (with particular respect to effect of certain actions on condition loss).

So far we definitely know:

High Press has a large effect on condition loss
Man to Man has a moderate effect on condition loss

I think we're pretty sure that:

Fitness skill has no effect on condition loss

There's also been suggestions that:

Condition bonus may or may not have an effect on condition loss
Arrows effect condition loss
Age effects condition loss (I've actually heard both ways - some people say younger players lose more condition and some say older players lose more condition)

As painful as it is, I'm testing with one friendly per day (when I remember) against Mourinho as it's as close to a controlled environment as possible (he uses the same team and same formation).

My first test was the condition bonus. After six games (and no goals lol) with half played with no condition bonus and half played with condition bonus the entire match I am pretty confident that the condition bonus has no effect on condition loss (if anything I think the stats probably show you lose slightly more condition with the condition bonus lol, I'm yet to properly analyse the spreadsheet though).

My next test will be arrows.

I will also analyse the effect of position (eg with multi-position players), age, quality, morale, relative fitness (a player's fitness skill in relation to their overall quality), match rating, and anything else anyone wants me to.