1/9 35 minute walk, avg HR 110 BPM. 40 minutes cardio on heavy bag. No warmup, just straight into it going fairly light at first. The break around 5 min was due to cutting my elbow open on the bag seam--I was dripping blood on the mat so I had to go get paper towels (to clean up mat & to put pressure til it clotted). This was mostly punching, but I did some kicking too. I found that kicking got me above the HR rate I was targeting pretty quickly... when my HR got too high I walked around a bit before going back to the bag. I think this can work for me as a cardiac output exercise--I need to figure out the right intensity & speed on the bag so I can just keep it up the whole time instead of having to take breaks to drop my HR back into the target range. Hopefully as my conditioning improves I'd also be able to do more kicks without spiking my HR out of the target zone.