You are not looking for a cardio workout, am I right?
Although I understand that PCOS means your insulin is also compromised as mine had been for years, and I had not known it one bit!
Walking is somewhat better than yoga as "cardio", but I've somewhat severe hills where I mostly walk (no choice of topography near where I live, shop, do chores - and they are many .. I need no car.) Walking is the ONLY physical activity that boosts my confidence levels.
So I am in need of Big Cardio. I learned through taking my blood glucose readings twice-daily, every single day, as a newly-diagnosed Type 2 diabetic, long story I need cardio, and not stretching masquerading as such.
Cardio is, and with NO exceptions, exercise that leads to both rapid AND deep or shallow breathing at the same time. Rapid and deep or shallow breathing, NOT just your heart pounding, not just a raised pulse rate! Using the largest muscles of your body (i.e., the legs) in a rapid repetitive fashion. You could get a raised pulse just sitting and watching a horror movie ...
I somehow manage this DESPITE orthopedic problems and a bad knee ... choosing cardio belly dance, and modified Masala Bhangra workouts - mostly at home as well as in class. Thus I can't do the efficient thing, and shoehorn in a 20-minute run. (Not that I could ever really like running in my youth, before those problems. Never liked it--it caused me much upper abdominal pain or extreme fatigue, chest pains/side stitch.)
The style of yoga I practice is a bit far from Ashtanga (which some may recommend you go in for), I made up my own vinyasa style when DVDs and classes early on, stopped cutting it for me in the accessible strength-building department. That is done mostly at home, as well, at this writing. The style again became faster, still not cardio; but somewhat less strength-building. As my body became far lighter in fighting relatively severe Type 2 diabetes I presented with.
I had to give up most of my pilates! It broke my heart to have to have dialed down the frequency of which to practice yoga and pilates, as my schedule is too packed to do these now lower-priority workouts!
Dance exercise and dance movement spiritual modalities such as 5 Rhythms, are saving my life and they are as enjoyable as walking and yoga, if not more so ...
Lesser artists borrow, great artists steal.
- Igor Stravinsky
Find a way.
(Said after swimming from Cuba to Key West without fins or shark cages)
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◈ Don't Want 2 be fat or skinny team www.sparkpeople.com/myspark/groups_i
Now 109 pounds less than at age 24–w/o surgery!