today I tested my 1RM on floor press 24 days after the last 1RM.

Workout n°14

Deadlift : 147.5
Curl L/R : 26
Floor Right : 44.5kg (+2kg in 24 days)
Floor Left : 42.5 (+0.5kg I trained too heavy and overtrained so I made nearly 0 progress).

It seems that 90% is as effective as 95% because during those 24 days I didn't increase the load enough to stay at 95% I was around 92% and despite that my progression is maximal. I made a mistake when I tried to get as close as 100% as I could. I should have continue to test the optimal load. I thought 95% was optimal but it seems it's more like 90-95% and thus I will probably soon do all my singles at 90% which will decrease the risk of overtraining to ZERO and decrease the stress on joints. I definitively don't need to warm up anymore.I'm very happy, I made good gains and if 90% is really as effective as 95% I'll have found the Optimal Load (in 2008 I extensively tested 80% and 85% but it was too light => under-stimulation).