In 2015, Dr. Peter Schnohr, a Danish cardiologist affiliated with Frederiksberg Hospital in Copenhagen, led a study to examine the impact of jogging on long-term mortality. The conclusion? People who are physically active have a 30 percent lower chance of death relative to people who are physically inactive. Interestingly enough, Dr. Schnohr and colleagues also found that light joggers had a lower risk of mortality than moderate and strenuous joggers.
A year later, a study conducted at New York's Hunter College used wearable devices to monitor the physical activity levels of 332 subjects based in countries around the world such as the United States, Ghana, Jamaica, South Africa, and Seychelles to account for a wide range of different lifestyles.
They found that people with moderately active lifestyles managed to expend more calories than people who performed virtually no exercise at all, which wasn't all that shocking. What came as more of a surprise was that people with highly active lifestyles did not expend significantly more calories than those with moderately active lifestyles.
"More exercise can still be very good for your health, but if you’re already moderately active, you are not going to see any change in your energy expenditure," said study author Herman Pontzer.
The human body makes remarkable adaptations to limit the amount of energy that it expends in a given day, so if fat loss is your goal, a very aggressive exercise program might not do much for you. Jogging one to two hours per week (total!) will probably do the trick.