I am around 15 stone. Started changing lifestyle 2 years back, have run 5 half marathons, joined gym, changed diet massively and now cycle as well. Weights the same, but life feels better, don't get breathless, sleep better, skin conditions great. To many my weight staying near the same would be failure, but instead im now looking at the positives listed above. Some bodies have limits that would probably harm you more to push through. Don't get hung up on scales.