Thanks @aamin for your honest reply. However, cryotherapy has been confirmed to have a lot of health benefits for athletes in general and this is not limited to footballers or C.ronaldo alone. However, I only asked 'if C.Ronaldo's phenomenal physical shape that astounds millions of his fans, clubs and rivals can be traced to cryotherapy?'. You can re-read that line several times

In conclusion to your intuitivity, you can not dispute the fact that health is directly proportional to an individual's performance. Although, it may not be the only factor responsible for his top performance just like others footballers do as you claimed.
You can read more on some of my highlighted references.
Regards to you my dear friend!