I'm sure it's very dependent on each person. Some people get tennis elbow, some don't. The Thinkpad 760 I had only had a Trackpoint, so when I was using it as

I'm sure it's very dependent on each person. Some people get tennis elbow, some don't. The Thinkpad 760 I had only had a Trackpoint, so when I was using it as my main machine, I used it 8-ish hours a day. The last joint in my pointer finger was pretty sore by the time I stopped using it.