"Too much food + not enough effort = obesity.Simple energy...

"Too much food + not enough effort = obesity.

Simple energy equation.

1 kg of fat is about 37,000 kJ.

Walking for 1 hour burns about 900 kJ.

So you needs to walk for around 40 hours to lose 1 kg of weight.

Not good odds."

Problem here is that most stuff in the body burns more readily than the fat, so it's more like five times that work to burn that much fat.