Specific needs for a HRM - HELP!

dietitiandanielle

Hello Everyone! Currently, I track my overall activity level with the fitbit and use a garmin HRM/foot pod to track my runs. There is one very large part of my exercise regime that these two fail to cover and I'm wondering if anyone knows of a product that might help. I study Krav Maga (Israeli hand to hand combat) and here are the issues with using the above fitness monitors:

1)Fitbit doesn't track heart rate nor all the movements done in a typical Krav session
2)Garmin heart rate monitor with ANT+ for the iphone could work but often I'm too far away from my phone to transmit properly (more than 30ft)
3)I can't wear any type of watch, band, arm band, etc as during grappling or some of the more hands on stuff it would get knocked off or destroyed so that eliminates the fuel band, body bugg, etc

I guess my question is, does anyone know of a chest strap that collects data that can be uploaded later via USB or something similar?? I don't need immediate feedback via a watch or app...it'd just be great to track those sessions to get a better gauge of my calories in/out - see if I'm fueling properly.

Any suggestions would be greatly appreciated!!!!