I just met a guy riding a Rocky Mountain of some sort. He was wearing a mask. On a trail. By himself. During an activity that requires as much oxygen as you can get. It boggles the mind...
Been doing some 5s and 10s. I started doing intermittent fasting 20/4 a couple weeks ago. The weight is just falling off. The bad news is 10 miles is about my max fasted. Any more than that and it is not an enjoyable ride.