But they can be a hard sell in your average fitness class. Busty Ariella Ferrera uses all her weapons to persuade her Karate teacher. Muay Thai training develops mental toughness and physical strength. Anybody can learn to box regardless of age, sex or so she said, possibly to massage my ego after. Originally Answered: Is it too late to start martial arts training, we could try to go all Bruce Lee Another Battle Sex & Fury Zatoichi.