One study found that consistent tracking of physical activity helped with weight loss. Meanwhile, a review study found a positive correlation between weight loss and the frequency of monitoring food intake and exercise. Even a device as simple as a pedometer can be a useful weight-loss tool. Researchers estimated in 2017 that there would be 3.7 billion health app downloads by the end of the year. Of these, apps for diet, physical activity, and weight loss were among the most popular.All of these have been confirmed in scientific studies. There are many things you can do to lose weight and improve health. Here are the 25 best diet tips, which you can start implementing now.The average age of patients in the diet group was about 55, while the average in the surgery group was 49. Those in the surgery group lost an average of 51 pounds, while those in the diet group lost an average of 48 pounds. All study patients maintained that weight loss for several weeks before follow-up studies were performed.