Thanks Sean, sure...
The web is very stretchy, as is the lycra, and it needs to stretch to fit you and when you move. The glue however, is not stretchy.
So if you imagine, gluing little dots about 3 to 4 mm apart will allow both to stretch together, between the dots of glue. If you were to glue the entire length of the web, it wouldn't stretch at all! Does that make sense?
I used a cocktail stick to apply the glue. I'd squeeze some glue into an old cup, then dip the stick into the glue and touch it onto the web first. That way, you get the right amount and reduce the risk of any mess getting where it shouldn't.
Good luck!