My 40 something sons are in incredible shape.
One rides his bikes over 10k miles a year and is a cellar master/asst wine maker in a 3 story winery. He is a lean/mean machine. Yet, if he has his billfold in his pants and sits for a while, he gets the sciatic nerve pain.
Our older son is the opposite re build. He is a little over 6' and is solid muscle.
He runs 3 times a week and walks 6-10 miles a week with his 50# pack he uses to back pack in to bow hunt. His billfold is out of his pant pocket while driving, riding or just in his office. Like his bro, a short sitting spell with the bill fold brings on the sciatic nerve pain.
My wife is 72 and weighs less than she did when we got married. She is not an athletic, but she is a doer. She tends her garden, and we walk several times each week, up and down our hill. She had the sciatic pain while yaking in our Oasis until we got her the Hobie seat cushion.
Maybe sitting for an hour or more in yak or anywhere causes problems for many of us.
The four of us don't do well if we sit more than an hour while driving, riding or just watching tv or on the internet. Our bodies need to get up and move at least 5-10 minutes each hour. Our bike riding son on his weekend 100 mile rides each day, needs to stand up and pedal several times each hour inspite of pedaling at a brisk rate.
On longer road trips, my knees stiffen up and my wife's hip causes her problems. So about ever 50 minutes or so of driving/riding, we stop and walk for about 10 minutes if we can. My wife jokes that it would take us 30 days to go cross country.
There is a lot of truth in the old saying, "A body in motion, tends to stay in motion!"
My wife's sciatic nerve really bothers her when pedaling our hobie. We've tried changing seat positions but can't seem to get her comfortable. its really frustrating since she doesn't enjoy kayaking due to this pain. Just for some back ground she is in great shape, does half marathons, bikes 30-40 miles, duathlons etc.
Does anyone else have this issue? Does anyone have any suggestions on what we can change or adjust to limit the pain? Thanks so much.