This may be nationwide but my Aldi has the chest strap/watch for $18.99

I have an earlier model from them and it’s been well worth the money.

I use mine with Insanity: Fast and Furious in the mornings. I stay in the 115-142 heart rate zone to burn fat vs. cardio which would be higher of course.

I do it as a fasting type workout. All I have is some water and a little E&E preworkout drink with some P90X recovery drink to help the flavor out.

It’s invaluable for burning fat by keeping you in the right range. Mine beeps if you go out of range so you always know where you are at.

After some time with these tools, you will know what you feel like when you are working ‘too hard’ or not hard enough.