A、Doing yoga. B、Jogging. C、Doing some weights. D、Learning breathing. B由对话首句joggmg in the park like me可知，该男士正在慢跑(jogging)，故选B项。

M: What’re you doing up so early, Anna? (19) Have you decided to take up jogging in the park like me?
W: No, Mike. You know I really can’t stand jogging. I’ve joined a yoga class at our local fitness center. I hear it’s a great way to stay fit. Want to join me?
M: No way!  Yoga is for girls.  I’d rather do some weights at the gym than (21) distort my body into painful postures.
W: Come on, there’s more to yoga than that! (20) It’s perfect for physical and spiritual well-being. It also helps your body become more flexible.
M: No thanks—I think all of this is (21) just a moneymaking trick. I’m telling you Anna, don’t buy into it!
W: Mike, we just learn three new postures every day and do some meditation. My yoga coach is going to teach us about breathing today. Did you know that we don’t even breathe properly anymore?
M: Count me out! I don’t need anyone to tell me how to breathe! Just because celebrities are doing yoga, everyone’s running after it.
W: That’s not true!  You’re always reluctant to try something new. Give it a chance~you might enjoy it.
M: Okay, but (22) only if you promise I would end up with a body like what exactly Stallone has got!