Proper way to ground while on a treadmill

I have a "treadmill desk" setup in my home office. Basically I bought an adjustable standing desk and a flat treadmill to go under it so I can walk while working from home. On my desk I have my laptop connected to two mounted monitors along with a wireless keyboard, a wireless mouse, and a pair of powered speakers. The receivers for the keyboard and mouse are plugged into a non-powered (no external power supply) USB hub. I also have a yubikey for 2 factor authentication plugged into the hub.

The problem I am having is that I build up a static charge while walking on the treadmill and it discharges into the computer anytime I touch the yubikey, the USB hub, the monitors, speakers, or the laptop itself. It also seems to discharge occasionally without me touching any of the components. I sometimes hear crackling in the speakers and the USB hub will randomly disconnect, leaving my keyboard and mouse non-functional for a few seconds. I noticed if I touch a nearby lamp first I can discharge some of the build up but even if I'm holding a metal part of the lamp, I still discharge a little into the computer. I've started wearing an antistatic wrist strap clipped to the lamp while walking and it has cut down a lot on the discharge, but not entirely eliminated it. This only happens when I am actively walking on the treadmill. When the treadmill is stopped, there is no discharge.

Another thing, I am aware that my house wiring is probably not correct. When I test the outlets in my home office, the GFCI in the bathroom right next to my office trips and shuts down all of the outlets in both rooms. The same thing happens with the kitchen outlets. All of the outlets not on GFCI circuits register as "open ground".

So my questions are: is it possible to properly ground my treadmill so I can stop discharging static into my computer? Is the "open ground" a contributing factor, or a separate issue entirely?

Thanks in advance.