Only if putting 5 stone on over 15 years is yoyoing.
Just to put your mind at rest.
At 18 I left home and immediately my staple diet was pizza, wine and beer. In 12 months I went to 17 stone from 13.
At 19 I got a job at a stables and with my money stopped drinking and the job was physical, this was my first weight loss.
At 23 I met my wife and settled into meals round the table and plenty of social drinking. I also got into a habit of finishing her plate for her. As my career progressed my jobs got less physical and I spent more time behind a desk.
As I am 6' 2" we didn't really notice the first few stone.
At 36,this year I got a job that means I spend several hours a day in the car. I made a decision that if I did not sort my weight out I would end up seeing my days out overweight.
Hence, a severe change in lifestyle.
Hope this clears any worries. I am a firm believer of doing what feels right and so far I feel great.