9. Do the downward facing dog

By Boston.com Staff

Fight the cold of winter. Warm your muscles from the inside out with a yoga session. Try a single class at Bikram Yoga on Lincoln Street, in the Back Bay or at Harvard Square for $22 for adults, $16 for students or seniors. Maybe you want to kick it up a notch with a more challenging yoga experience. Try a walk-in class at The Yoga Studio. Ninety-minute classes are $15, and a two-hour session is $20. Sadhana in the South End offers one month of unlimited yoga for $30 ($24 for full-time students).