Possible Clues:

• Exercise that can involve karaoke or goats
• Tokyo gangsters showing physical and mental discipline
• Class that's a stretch for everyone?
• System of exercise for mind and body
• Exercise with poses
• Discipline with hatha and vinyasa varieties
• 'Would it be a stretch to say I dig your ___ T-shirt?,' Ava asked
• Tree pose discipline
• Goya (anag)
• Exercise with lots of poses