 I'm Graham Parrington, I'm 70 year old. I do these bodyweight exercises, the calisthenics, which I've been doing for a year now. And we're doing the exercises which I thought were impossible. It's given me a new lease of life. As you get older, people get frail and you need to have a very good core. The stronger core you are, the more agile you're going to be. One of the things with older people is you soon fall over. Having seen their posts on Facebook and read about them, I thought there's no way I can do that. I found that I can do a clutch flag, back lever, an impossible press-up, which is nearly impossible. But I just showed you what you can do using bodyweight exercises.