Rent takes money from your bank account. Gas takes money from your bank account. Paychecks put money into your bank account.

If you spend more than you make, you are in a financial deficit and this will negatively impact your credit.

Running takes calories from your body account. Lifting weights takes calories from your body account. Eating food puts calories into your body account.

If you spend more calories than food you eat this will put you into a caloric deficit and that will negatively impact your weight.

A minor caloric deficit sustained over time will help you lose weight sustainably provided you have weight to lose in a healthy manner.

If you do not have weight to lose in a healthy manner then a caloric deficit will cause you to lose mass in a less than desirable way. You can technically be eating everyday and still die to starvation for example.