Raj Choudhury (Bikram's wife) has been supporting scientific studies of Bikram Yoga for several years (thanks Rajashree!). There have been a several articles published about the studies. Raj shared some of them on her Facebook page.
Time Magazine: Is Hot Yoga Good For You - And For Weight Loss?
Colorado State University: 'Hot' Yoga Yields Fitness Benefits
The results of the study are here.
This journal honors my ongoing experience with the practice, study and teaching of yoga.
1) Sridaiva Yoga: Good Intention But Imbalanced
2) Understanding Chair Posture
2) Why I Don't Use Sanskrit or Say Namaste
3) The Meaningless Drudgery of Physical Yoga
5) Beyond Bikram: Why This Is a Great Time For Ghosh Yoga