Cristiano Ronaldo -- It Takes 5 Strong Men to Massage My Body

Cristiano Ronaldo is a big fan of the 5-on-1 ... at least when it comes to his massages -- and the soccer phemon just posted a photo to prove it.

The Real Madrid star just tweeted a pic showing a handful of team trainers getting their deep tissue on ... while a mostly naked Ronaldo lies on a table giving a thumbs up.

He included the caption, "Getting ready for next year with the last massage."