This is interesting. yes I do sometimes get sore fingers pads but only if I have been playing for longer than an hour. I am also getting 'on a bit' and suspect I have a creeping stiffening of the joints. I always think the playing helps me maintain flexibility. I definitely have less finger stress if I play seated which is a pity because I like playing whilst standing.
The best advice in this forum has been to take it easy if you feel you are overdoing it. Pins and needles in the pads isn't the main concern, it is the little finger stiffness.
Have a look at how Alistair Anderson swings his tina and be afraid.... mind you, it looks quite small and light compared to my edeophone.