Because 1 kg of body fat contains approximately 7,700 calories, a 70 kg person would need to walk for about 35 hours (around 140 km) to burn 1 kg of body fat.

At first glance, this may seem achievable by walking for one hour a day for about a month.

But that’s not how our bodies work. We use a mixture of carbohydrates and fat for energy during exercise.

One hour of walking may not be enough to noticeably reduce belly fat.