In this social media environment anything that worked would be hash tagged to death, on every talk show's agenda, and would be a sidebar on every broadcast news program, not to mention ESPN and the Weather Channel. So absent evidence of such a response, there is probably not a reliable enhancer available to us.
Three mile walk with my Shelties in the morning and an hour in the gym in the afternoon: Cardio, resistance, callisthenics. Recently received a FitBit Charge and now working its features into the program.
Yes, on more than one occasion with more than one partner and at multiple work sites --- and it was absolutely mind blowing when we added the risk of exposure.