Marcel grabs Tyrone, who is 10 kilos heavier, by the waist and lifts him up like a slingshot. He slings his brother over his shoulder. A thud fills the room in the room. Tyrone cushions the blow with his back, pats himself off, and nonchalantly gets back up. “Better. One more time.” They continue like this, three workouts a day, six days a week.