When I worked full time I was on a continuous cycle of burn out, sick leave, staggered return, full time, workload ramped up, burn out etc.
I reduced my working hours in the end for the sake of my health, but it has severely restricted my career as few jobs are offered part time anymore. I usually have to take full time jobs and then negotiate reduced hours, then people get snotty that I knew I couldn't work full time when I took the job, but if I didn't do this I would have been unemployable and on benefits for the last 20 years 🤷
IMO the decline in availability of part time jobs since 2010 has had a massive impact on the young (working while studying), the disabled (can't manage full time) and people with caring responsibilities (can't be out the house for long hours). I suspect this contributes to the number of people "economically inactive" (how I fucking despise that term).