The number of people who exercise is relatively constant over time. It is almost the same as 30 years ago. But today’s society is considerably more overweight and obese. Even children are now having insulin resistance and type 2 diabetes, which was never imagined in the past. There’s definitely something different in the equation, and it is related to our dietary choices.
The food industry has become massive in the last decades. They have adopted industrial processing to elaborate more and more food for people who are becoming addicted to sugar, processed flavours, dyes, preservatives, and many chemicals. According to studies, every 150 extra calories of sugar increases the risk of diabetes 11 times, and that’s completely independent of their exercise level.
So, at the end of the day, losing weight with exercise and a poor diet is not possible. Exercise is simply not enough. It does sustain weight loss, but this weight change is only driven by a careful nutrition plan.