Click here for more articles by Kormedi.com. BTS member Jung Kook has sparked buzz after sharing proof of intense treadmill training roughly a month before a planned concert in Gwanghwamun on March 21. Jung Kook recently posted a treadmill workout record on social media with the short caption “A-ja-ja.” The data showed he ran 8.02 kilometers over 1 hour and 19 minutes, highlighting notable endurance. His average pace of 9 minutes 50 seconds per kilometer suggested sustained aerobic effort, underscoring how seriously the “performance-type artist” is managing his fitness ahead of the March concert. Average heart rate 168 BPM indicates high-intensity training Born in 1997, Jung Kook is 28 years old. The estimated maximum heart rate for men in their late 20s is about 190-195 beats per minute. His average heart rate of 168 BPM corresponds to roughly 85-90 percent of that maximum, indicating he was exercising not at a light jogging level but within a high-intensity aerobic zone (Zone 4). High-intensity aerobic exercise rapidly improves cardiorespiratory endurance. In practical terms, it