Just a bit of news from me in Australia. I have started on a three day a week walking regime, walking around 7 1/2 miles per outing. I have built up to walking at a reasonably fast rate, about 10 mph in US terms or 6.6 kph for the metrics. I am certainly feeling better for it. I wear a Fitbit watch which records heart rate, speed, distance etc so I can keep a record of my progress. I am now using a CPAP machine, as I have been recently diagnosed with sleep apnea. It takes some getting used to but I am starting to feel more energized during the day. Life is getting better, and my MAC symptoms are getting less.