Ruby,My oh plays footy and uses a spray called 'Ralgex' and one called 'Deep Heat' on pulled/sore muscles and I've used it a few times. Works a treat at easing discomfort but you might have to spray a good hour or 2 before you go for 1st part of interview as otherwise you'll smell like an antiseptic-ey bloke! it does gradually heat up and then goes away though after a while n might help you a bit. haven't a clue how much it is though, never paid attention!