Hi Outlaw,

never used an exercise base (curious about them as well, though) ... but ...

... for swimming/sweating situations I had decent results w/ waterproof glue at the front and stronger tapes at back and sides ... utlrahold glue (PITA to work with, though), blue liner tape or Proflex (Extendabond) tape (wide tape w/ blue backing and holes punched in it).

FWIW,
~FB