Brazil forward, Neymar Jr., took part in a medical examination with his national team coaches and doctor, as they prepare for next month’s World Cup in Russia.
Neymar has been in a race against time to prove his fitness, after suffering a broken foot while playing for Paris Saint-Germain earlier this year.
After an operation in his homeland, he went through the rehabilitation stage and is now back in training with his international team-mates.
He wore an oxygen mask and had numerous monitoring pads on his chest, as he ran on the treadmill surrounded by officials.
His condition was also assessed during a series of short drills with fitness coaches.
The squad have gathered at Granja Comary, in a training centre in Teresopolis to begin their build-up for the summer.
Brazil will face Costa Rica, Serbia and Switzerland in Group E.