The standard answer that you can expect to get (which may very well work for you):
1. Change your calories. Possibilities:
- Up your calories for a while (yours are very low right now, particularly considering that you are exercising so much)
- Try calorie cycling (lower calorie days mixed with higher calorie days, averaging out to whatever your daily is right now - if you do this, I'd recommend averaging higher than 1200.)
- "Spike" your calories for ONE day. Have a REALLY high calorie day (well above maintenance - I didn't calculate yours, but for my stats I would consider this to be ~2500
+ kcal). Then return to your normal eating.
2. Change your exercise. Possibilities:
- If you've been doing the same exercise routines for a while, switch them up. Do something else for a while - a different routine or a different activity altogether.
- Increase your exercise.
- Take a few days off for rest days.
What worked for me:
- Patience.
I know it's not what you want to hear, but as long as you're genuinely in a calorie deficit, the scale will catch up to you sooner or later.