Of course, now with 100, 100+ weight and Arthritis Unable to do these. Age has nothing to do with it.
In my childhood, P.P. Guruji Golwalkar used to have fun on my baby fat and slight paunch and would ask me to stay in Ashtangasana Yog without letting the tummy touch the earth. I struggled, struggled, and finally got it. The max times I did this was 108 times.