I have professed my love for the 90-plus-degree vinyasa classes at CorePower Yoga, but here are five more spots where you can sweat it out until Winter's end. Believe me, nothing makes you forget that it's literally freezing outside like an hour or more spent stretching and posing in a sauna-like studio.

  1. Bikram Yoga in the City (219 W. Chicago Ave., 6th Fl, 312-255-9642). At Chicago's original Bikram Yoga studio, the 40-plus classes per week are taught in a room heated from 105 to 110 degrees, helping with flexibility, preventing injury, and promoting detoxification. In 90 minutes, the people at Bikram Yoga say you'll work at least 292 systems in your body (I didn't realize the body even had that many) while sweating out all those nasty toxins.
  2. TruHarmony Yoga (900 N. Franklin St., Suite 508, 312-643-8577).  Determined to be the most calories burned in a yoga class by Time Out Chicago, TruHarmony Yoga heats all of their classes to 95 degrees. The River North studio overlooks the city and offers classes influenced by the Baptiste Power Vinyasa Yoga methodology, which includes a combination of vinyasa, pranayama, and modern yogic principles. Group classes are held seven days a week, and TruHarmony also offers private yoga instruction.
  3. Bikram Yoga Chicago (1344 N. Milwaukee Ave., 773-395-9150; 2736-A N. Clark St., 773-348-9642). All the instructors at Bikram Yoga Chicago complete more than 900 hours of Bikram study before they're allowed to take you through 26 asanas in 90 minutes in a 105-degree, 40-percent humidity filled room. The two locations offer four to eight Bikram classes per day, and the studio offers a $29 first-time students special — 31 days of practice for both studios. Daily attendance is recommended.
  4. Chicago School of Hot Yoga (2442 N. Lincoln Ave., 2nd Fl., 773-868-9642). Not quite as hot as traditional Bikram, Chicago School of Hot Yoga's studios are heated to a minimum of 85 degrees for a wide selection of classes. I recommend Yoga Body, a practice that incorporate weights, bands, and plyometrics to increase strength, and Candlelight Vin/Yin Yoga, a gentle, rhythmic vinyasa class that also includes a lot of seated and reclining pose.
  5. Om on the Range Yoga Studio (1834 W. North Ave., 2nd Fl., 773-772-9642; 3759 N. Ravenswood, Studio 125, 773-525-9642). Om on the Range is an equal-opportunity, noncompetitive yoga studio, open to students of all flexibility and fitness levels. Classes at both locations are all heated and vary in length from 60 to 90 minutes and include Baptiste Power Vinyasa Yoga, an energetic flow class, a Basics class designed for newcomers, and Bikram, offered only at the Lakeview studio. On Sundays this month, stop by Lululemon Athletica (1627 N. Damen Ave., 773-227-1869) at 10 a.m. for Sunday Salutations with an Om on the Range instructor. The classes aren't heated, but they are free! Some things are worth braving the cold.

Source: Chicago School of Hot Yoga