I've been doing yoga for about 4 years but wasn't consistent in my practice until I took up Bikram yoga 2 months ago. I'm over 60 and it was strenuous to start with, that's for sure. However, this is the very first exercise I've done that's really made such a difference in the way I look at feel.
I went from a size 10 jeans to a size 8, for one thing and I feel less stressed, more flexible and have more energy.
My other yoga class at the Y was good but if I skipped a week, it didn't matter that much. With hot yoga, I have to keep going consistently or it would kill me-lol. The hot yoga studio has a wide range of class times too so that really helps me get there 4-5 times a week.