How to effectively use an Apple Watch during Crossfit Workouts

I struggle to use my Apple Watch (Series 2) during Crossfit workouts to accurately track heart rate and other metrics. My medical gives me a rebate based on heart rate data during exercise which it picks up from the Health app so this is an important feature for me.

I have found the following:

* When the Apple Watch is used for simple exercises like running, cycling, walking or on stable exercise equipment like a treadmill or cross trainer the heart rate data collection is pretty good.

* When the Apple Watch is used for a typical Crossfit workout it does not always accurately record the heart rate data but it does a passable job if the watch is tightly strapped on and there is not too much wrist movement.

* The biggest problem about using an Apple watch for a Crossfit workout is that the digital crown or side button are frequently pressed inadvertently. One partial solution to this problem is to "lock" the watch by pushing the water droplet icon but if the digital crown and side button are simultaneously depressed accidentally then the workout will still pause and you will lose the data for that portion of the workout. This will frequently happen during any exercise which involves good deal of wrist extension (for example, handstands, Olympic lifts like cleans or front squats, ring work or bar work). IMHO the "lock" function should include preventing an accidental pause but Apple has chosen to leave the pause function active.

I was hoping that there were other Crossfitters or similar athletes who had experienced these issues and had found solutions to them. This is not really a complaint about the Apple watch but rather an exploration of ways to overcome one of its limitations.