I tried to do 100 push ups in a row yesterday on the occasion of halving day.  But I could do 30 push ups a day due to my health which I have experienced in trying to give 40 push ups in the last one month.  I did 80 push ups yesterday and today combined.  My body did not agree with me on the occasion of the halving day.  But I hope to do 100 push ups a day by doing this.