I worked this schedule while I was studying, 5-hours a day 5 days a week (part-time) and to be honest my productivity was around 85/90% compared to working 8-ho

I worked this schedule while I was studying, 5-hours a day 5 days a week (part-time) and to be honest my productivity was around 85/90% compared to working 8-hours a day 5 days a week. I would have the stand-up as 10/15 minutes after arriving, and then I would most of the times enter flow and work for 1h30 to 2h, make a break and work for more 1h to 1h30, sometimes longer if I got distracted with time. On those flow blocks I would only pause in intervals of 2-3 minutes for filling the water bottle or going to bathroom. Between those flow blocks I usually had a longer break to talk with my colleagues (work related or not), sometimes play a bit foosball or board/card games and eat. It was great, except when we had bigger meetings/workshops and other time consuming events. When those occured I had troubles getting into flow. In those days I managed to do it I would often get distracted with time and work 5h30 to 6h unintentionally. It worked really well, I think the lunch break has a large context switching cost, making it hard to have productive 8h. Making it feel like either the morning or the afternoon short on time. I would also love to try 8-9h (getting more hours after the context switch of lunch) a day 4 days a week. Getting 3 days to focus on you (your hobbies, chores, friends, family, whatever) and 4 days to focus on work might be a great alternative as well. I might suggest and negotiate it in the near future.