[hannah]

My knowledge:

What do you sweat out? Things that are stored in your fat cells.
What is getting stored in your fat cells? A lot, for instance waste materials which your body wants to sweat out, and oils but not vitamins and proteins I know.(you have to take them everyday to for see your body from proteins and vitamins, everything that is too much will be broken down by your liver. Simple to say there is no stock for vitamins and proteins) I also dont think that herbs are getting stored in your fat cells.
So to say I think I've already tackled your theory... Because It won't be stored in your fat cells so you wont sweat it out. Herbs are just available for a certain amount off time in your blood, then they'll get broken down by your liver so you'll pie it out not sweat it out.
You ofcourse can absorb things through your skin so external usage can be helpfull.
More training will make the herbs in your blood go round faster which can mean two things: quicker absorbation or quicker demolition or both.
These are my thoughts