Try to do both! If one is into exercising without having a proper diet, the effort will just be put into waste especially if you eat junk food afterwards. That's a big NO! Having a balanced diet is also essential to maintain healthy living and avoid future illness. Trust me on this one. I've been exercising and incorporating a balanced meal to my diet. I'm happy to say that I lost 3 kilograms in just 3 weeks. Perhaps, a little progress for some. I'm new to this and just giving my body and mind to adjust. I started exercising for 15 minutes for two weeks and now I'm on my 5th week and I can do 30-40 minutes. I'm just loving every minute of it. As they say, "No pain, no gain!". So with proper diet and exercise we will surely lose weight and most importantly, we will get our confidence back!