I am 57. For me, this is a hard time of life as both of my parents are very elderly and frail with different health issues. I get up to visit them approx every 3 weeks, or more often when emergencies happen.
This makes planning anything else tricky and I find it hard to concentrate on any hobbies.
I am sure that others are going through or have been worse. My wife lost her mother to cancer some 20 years ago and worries about losing her only parent, her father, who has lost the use of an eye and got sciatica, leaving a formerly fit and active man a lot less mobile.
I am incredibly level-headed person, with no mental issues (kudos to those who suffer similar through depression or worse .. like my wife) .. but even I find this period tough. It may last another year or another ten, depending on the health of my parents. They have of course been a fixed thing in my life; always there .. just older than me.
I know my mother finds it hard as my father is frailer than her (he's on oxygen almost 24 hours a day), but they still enjoy life, even if my father is largely house-bound. My mother always ruled the roost, but is prone now to fits of temper as she struggles to cope with my forgetful and hard-of-hearing father.
Where's this going?
Life has its hard periods.
Look for the light and the fun when you can to see you through the darker times.