Had couple of sets of 3m 90-93% FTP with 15s 400-510w accelerations, repeated for 15m. Started to fail on sprints half way through first set. For second set just gave up all together in second and reduced power by 10%. Was doing it in erg mode. Mentally I was just done. It's been a very stressful week, and stress level is still quite high. Also haven't been sleeping well for last two days.