The longer you run, the more you don't lose weight if you don't diet.

 

At first, aerobic exercise helps you lose weight effectively.

 

As time passes

 

Because the body needs to adapt as well

 

They say you gain weight if you eat freely while running.

 

So, you need to change your exercise routine frequently.

 

Once the body adapts, it optimizes calorie expenditure.

 

Eating more than you move makes you gain weight.

 

Eating as much as you move doesn't lead to any change

 

The simple principle is that more movement leads to more weight loss than just eating.