On my estate someone would have popped your head for you!
Serious point: most folk who take a Sports Science degree have a sporty background, often to a high level. What was your sport? Do you still compete? That's a great way to drop the pounds alongside the diet.
I boxed quite a bit and played football. Honestly, a lot of those who joined the course because they thought it was all about sport tended to drop out early and find something else. Once we started getting deep into biochemistry and cellular stuff, research design, study of kinesiology.... plenty realised it wasn't for them (myself included to an extent).