76. Dr Peter Clarkson. Cardiologist & climber. How hard should older athletes train?

Dr Peter Clarkson, is an NHS Cardiologist based in the Scottish highlands, and a very keen and talented rock climber. He has also competed in triathlons.I’ve been trying to answer a question; 'how hard is too hard' when it comes to exercise for an older athlete? How close to maximum heart rate should we be hiking, running and cycling? What are the warning signs we're going too hard, too often?Dr Clarkson agreed to shoot a video with me for The Older Athlete Series and we m...