Floor Press Right Arm : 36, 39.5 not easy enough
Deadlift : 155, 172.5 much easier

I found that a Warm up Single with 90% of my Work Rep is very benefical. My previous warm up on Deadlift was ineffective (not hard/heavy enough). Today 172.5kg were much easier ! I don't know if a more extensive warm up would be better but now with a 1RM of 100kg I'll always train like that :

Warm up Single : 85kg (90% of 95kg)
Work Single : 95kg (95% of 100kg)

I'll try something like : 75-85-95 too see if it's better but I think that only one warm up single is enough, too much would produce fatigue and too easy/light would have no effect.