When it gets better, buy a foam roller and use it. I'm planning my trip to USA, don't make it one of my missions to come over there and foam roll your adductors in a stricly proffessional physioteraphetic way! ! :P I've better things to do, like military pressing cute girls!
But in all seriousness, start doing some mobility work for them at the beginning of a workout and some BW exercises at the end, and foam rolling of course.
I doubt adductors is the real issue here, it is a symtom of something else. Have you had any leg injuries on the same side?
To be stimulated into growing, a muscle fiber must not only be recruited, but also exhausted. - Vladimir Zatsiorsky