Ever wonder how many calories you are burning doing yoga? Well Apple has applied for a patent for a way to do just that.

Why it matters: The pitch for Apple Watch is being able to measure your exercise, whatever it is and people hate it when their form "doesn't count."

Apple's proposal suggests using a heart-rate sensor, a thermometer to measure ambient temperature as well as motion-sensing.

From Apple's filing

Standard patent disclaimer: Patents represent an idea that a company has but don't always mean something is coming to market.