Any issues with applying DermaTherm about 1 to 2 hours before an evening workout? I've been experimenting with different application times - usually alternating between morning and evening showers.
I do have at least 5 hours between application and a shower in this instance.
I do see on the packaging not to apply within 5 hours of swimming / showering / tanning - nothing about working out.
I would try to apply it when you're going to allow for the longest dwell time on your skin in order to attain best effects. The longer this is left on your skin between showers or potential contact loss, the better.
Perspiration from working out will help to open skin pours to potentially enhance absorbtion factors, but it will also increases the incidence of accidental contact removal from your skin.