At an age of 42, can i practise bodybuilding?

Exercise: Yes. As long as you are healthy and your physician has not put restrictions upon you.

Go for it: Whether you want to compete, or just have fun, feel good and look great, it may be a great new way of life for you. Ten years from now, you could be Photo Guy. I do urge you to opt for natural bodybuilding -- it's safe, healthy, wholesome, and most women prefer a naturally-fit man.