Core Viewpoint - The article discusses the benefits of exercising at 65% of maximum heart rate, suggesting that moderate-intensity exercise is more effective for fat loss, fitness improvement, and longevity compared to high-intensity workouts [1][2]. Group 1: Exercise Intensity and Benefits - Zone 2 exercise, defined as working at 65% of maximum heart rate, is identified as the "fat-burning zone," where the body efficiently uses fat for energy due to sufficient oxygen supply [2]. - Long-term adherence to Zone 2 exercise can lead to improvements in cardiovascular health and blood sugar levels, as well as enhanced mitochondrial function, which helps mitigate age-related metabolic issues [2]. - Zone 2 exercise is easier for most individuals to maintain, with lower risks of injury and less strain on joints and the nervous system [2]. Group 2: Recommendations for Exercise Regimen - The ideal exercise plan should focus primarily on Zone 2 workouts, supplemented by one to two sessions of high-intensity training each week [2]. - Slowing down the pace in workouts can sometimes yield better results for the body [2].