Best of Boston

When we’re working out to Gaga alongside 20 perfect strangers, we like to follow one rule of thumb: Don’t stop moving. And no one keeps us going like Dossas, whose energetic routines—whether in Kettlebell Knockout or Hard Body Meltdown classes—are unfailingly synchronized to heart-pumping beats. If we ever pause while Dossas is teaching, it’s only to wipe away the sweat.