I went to the gym for years and my weight fluctuated a couple of pounds. Cardio was especially ineffective for any kind of weight loss.

Weights were much more effective because they increased my resting metabolism. I drastically reduced carbs from my diet, increased protein and vegetables, and the needle on the scale started moving. I ate about the same amount, but I changed the composition of my food -- no simple sugars or simple carbs.

I don't want to be prescriptive, since everyone's different, but for anyone who finds it hard to adopt an exercise routine, I would encourage them to consider changing their diets and see if that makes a difference.