Its a pretty well known fact that exercise alone (unless you are doing extreme athlete training) is not going to change your weight without a change in diet.
You can get healthier with exercise, but not smaller. That is almost entirely based on diet.
Just think about it; your thirty minutes of running probably burned between 300-500 calories. That one protein bar probably has about 300 calories by itself.
> 300-500 calories
Put another way, up to a pound a week of weight loss, changing nothing about your diet.
And that's where the GLP-1 meds come in. You get physically sick from eating your current (oversized) meal size. You don't have cravings. You can lose weight using GLP-1 even if you don't exercise strenuously/daily. However you lost a lot more if you have a regimen.