ohbase on what you just say doing plank was the right choice. Though plank still ain't easy but still more preferable than push up for someone like your age range. Like back then when u was still engaging in various exercise I remembered that plank was not as easy as it's seems mostly when it's come to side plank. But still is Very Effective and helpful to your health in many ways.
 Damn the fact that many users is taking this more serious have got me all pump up (but not as the way bitcoin gonna pumps or increase because is gonna be massive)  but still am pumped up. To be honest philipma1957 you are really hitting wow this nice all this plank ain't no easy task but you still pulling up such age then I guess I got to try and make some good progress on my pushups. Am hitting bitcoin to price first one have get the hang of it then I will try 100 pushups  wish you all the best an a good health.