Lionel Messi is already training for the new season... with his son!

After reaching the Copa América final, Lionel Messi was awarded a longer vacation than the rest of his Barcelona teammates. He deserved a good rest after being the star of a Treble-winning season, plus carrying Argentina on his back all the way to the South American Cup second place finish.

But every world-class athlete, regardless of the sport, takes care of his body even in the offseason. Messi is back home in Catalonia, and he's getting ready by himself to return to the Blaugrana club on Monday to start his preseason preparations with the team.

So Messi took to the treadmill. With Thiago, his son, in the most adorable video you will find on the internet today:

Man, Thiago Messi is just the cutest thing of all time.