Porsche's seating ergonomic design (with exception to the Cayenne) are not suitable for daily long drive use, or touring purposes. The stiff suspension also adds to the exaccerbating factor. These are cars designed for the track, and touring is secondary- Porsche racing heritage.
My brother who is also a Medical practitioner (like myself) swears by his M3, and M5 because of the improved seating ,and ride comfort
...He can't blame me- i only have 2 passions; Sports Rehab , and Porsches hence my user ID.
I always make it a point to stretch out before, and after seating in SoCal traffic.