Hi,
Sorry for a bit late reply.
Personally I have not used "spinning chair" technique. My CFI said though that it helped some students. If it helped in spatial orientation or nausea I didnt ask.
I rather stopped eating Pizza Pepperoni+Pepsi Max+Snickers before flight and started with whole grain bread and light snacks. It helped a lot.
Additionally, I turn open the vent system to almost max during low sun days to battle the heat.
Low Gs make my stomack butterflies become huge seagulls
Oh and last advice from CFI was that nausea is also related to your stress level and confidence level. I.e. psychologically. Simply, trust in plane and your abilities and nausea will be reduced.
This old C172 lady has flown into some turbulence for more than 30 years and it holds, so yeah it helps to relax in SEV TURB
Hope it helped.