I have been having trouble with the front seat adjustment since day one and I just found this thread. If anyone is still interested by this topic, here are a few thoughts.
First, let make clear that I have been driving for decades and I have never experienced any pain behind my thighs (hamstrings) before I started driving the Odyssey 2014 which I just bought. During the road test, I did notice that the back and sides of my legs seemed compressed and I did spend quite some time adjusting the seat, but I could not get a pain free position. I thought, with all these adjustments, I will certainly find a way to release the pressure once I take my time and look into this in more details.
Well, after quite a lot of experimenting, there is absolutely no way to adjust the driver seat to release the pressure. The left leg can wonder around a bit and I can deal with the pain and numbness by changing positions. The problem is the right leg which needs to stay relatively immobile for driving and therefore, the pain becomes unbearable after 20-30 min. My wife has zero problem with the front seats and she finds them rather comfortable.
As far as I am concerned, I don’t like the backward tilt, but I do believe it is only part of the problem. I think the main issue is the front edge being too hard (not enough give) and the lateral edges being way to high. I have a rather strong muscular built and my hips and thighs are hard and bulky. The Odyssey seat actually squeezes my thighs into the hallow that is created in the middle of the seat and that is where the pain seems to come from.
I tried filling up the hollow with a cushion and so far, it does help release the pressure. Maybe a wedge cushion would be better, but for now, I am experimenting with a regular 1/2” - 3/4” soft cushion. Here is where the pressure seems to be the worse (red) and the area were the cushion (green) lifts my buttocks and thighs out of the middle depression:
(Click to enlarge)
Let see if this helps in the long run... I certainly hope it does...
sylco