Thanks, bearaab. I’ll check it.
@Al: Thanks for the reference.
It seems to me that calisthenics is one of the rare sports that do not have any restricted diet. People tend to eat a variety of food and still maintain their physique as well as strength. That, however, if you are at the advanced level of calisthenics. For beginners, especially the overweight, it is likely to be a matter of concern.