sweating with the Ostomy

Okay... so Its probably been a year since I've posted on here. Last time I did, I asked about swimming as it was right before my 10 year anniversary and we were going to Hawaii! The suggestion at the time was to use Sure Seals - which I did, with much success. I have been using them ever since. So thank you to all who gave such great advice.
My new question is similar:
I have recently begun working out - again, and while the Sure Seal works to repel water from the outside, I'm wondering if anyone has any suggestions on how to keep the sure seal on when the moisture comes from underneath!?!
I have to wear spandex so as to minimize the movement of the bag during my workout and I end up sweating - a lot!
Obviously I then have to shower after my work out and I sometimes try to avoid getting my abdominal area any wetter but it doesn't seem to make a big difference. Since beginning the workouts - I have had two leaks (first two since starting to use the Sure Seal). The sure seal contains them but my the lifespan of my bag has gone from 7 days to - 2-3. Anyone have any advice or ideas on how to keep up with the workouts but expand the lifespan of my bag again?

Thanks
Bridget