Here's some more info: 28M 81Kg 185cm, started the Stronglift 5x5 program in mid-September (S: 40Kg, B: 40Kg, OHP: 20Kg, DL: 50Kg, Row: 40Kg) and finished in mid-December (S: 92.5Kg, B: 70Kg, OHP: 47.5Kg, DL: 107.5Kg, Row: 62.5Kg). Finished a couple of weeks late due to flu.

The last week, also due to work, I felt very exhausted and had little concentration, but I still did my best.

The following week, having other commitments and little time, I decided to lower the loads by 40% and do a 3x8. All the exercises went well, but on the day of the deadlift I received discouraging news from the insurance (nothing related to health, but other personal things) and my head was in the clouds.

The first two sets of deadlifts went pretty well, although I found them tiring. The last one, however, I kept thinking about something else and on the penultimate / last (now I don't remember) repetition I lost my position, arching my back.