In a Lisbon gymnasium, people whose bodies have been ravaged by drugs are trying to put their lives back together.

They've formed two lines and laugh as they take turns throwing a ball to their partners.

Drug addicts who've forgotten how to have fun are being given a lesson in how to play again.

"They're surprised at the feeling of feeling good, at being capable of this," says physiotherapist Leonor Madereira, who supervises this work at the Taipas rehabilitation clinic.