Advice for reaching weight loss plateau for weeks!

You have to change your workout. Whatever you are doing you need to increase the level of resistance and intensity. You also may need to incorporate an exercise you are not doing like jumping rope, join a fitness class start jogging, etc.

Are you eating back your exercise calories? I had a 3-4 week plateau a few months ago - but that was when I wasn't eating my exercise calories back. I started eating them back (or the majority of them) and started to lose weight again. I don't have an hrm and just use the mfp calculated exercise calories. To be on the safe side, I eat all but 100 calories or so back. Another possibility... maybe you need to mix up your exercise routine. Your body may have gotten used to it... Lastly, some people eat a different amount of calories every day to confuse the body. It's called zig zag, I think... but the concept is that say they need to eat "x" calories a week... So the first day they eat x, day two they eat x+200, day three x-200... etc... Fortunately, I haven't had to zig zag, so I don't know if it works... but there are several threads posted on mfp about zig zagging... Good luck and don't give up!