Very interesting parallel with using a hr monitor and how that ties in with
@Brett Jones article with reps/sets/rest/form. The Push thing puts numbers to a qualitative summary of all the other variables, it seems.
When I first used a hr monitor it revealed that I was pushing things a little too much and I dropped the reps to 8 for sets of 10, stayed there for a bit and assessed my maf and how I felt and added a rep as I rolled along. It helped me recognise how my form too was affected by ramping up my effort, particularly in the latter sets.
I can see how this Push thing would streamline a similar process and combining the numbers to the feel of the session to get a richer assessment. And, it seems anyway, that part of that assessment too is judging how it feels to how it looks so there is human interaction with the data, it isn't just a number.
You could set up an alarm system, for swings anyway, by using a laser beam at a predetermined height of parallel arm/fist height. Everytime the beam was broken it would beep, if it didn't and you didn't reach the line then power would have dropped and end the set......a cheaper cack-handed option that it is but tie that in with perceived effort and you are getting immediate feedback. One of those builders levels would do it, or go the full Tom Cruise mission impossible I suppose.
As
@Oscar said above, a very useful device for fine-tuning program design and research. However, cost. I'd buy a bigger bell.....