Usefullness of isolation exercises when building mass or strength???

Just so I’m clear, the “clean pull from the hang position” exercise is basically a “jump shrug” correct? Meaning the exercise begins with the bar at approximately the knee with no catch?

That is correct.

Sorry for the nitpicking, are the arms kept straight or are the arms bending for the purpose of “pulling” the bar to a predetermined height (say the sternum, in essence a clean high-pull from the hang)?

Yes they are bending for the sake of pulling.

When you move to main. pkhase do you ramp up speed volume and other qualities?

With regards to my work with Jarome this summer using the tendo unit, what might I consider about the RFD?

With limited information, one thing I might recommend to help increase the efficacy of your maximum strength block is to up the volume a bit (4-7 sets, 1-5 reps, rest periods of ~ 5 minutes). I understand the necessity of managing volume so as not to interfere with specific sport training and/or overtrain, but I’m not sure your athlete is doing enough work in this phase. Keeping total working reps in the 12-20 range/workout may elicit better results.

In addition, and believe me I can’t quite put my finger on exactly why, I’m wondering if the clean pull from the hang lends itself well to training for maximum strength vs speed strength/strength speed/RFD. The answer as to why may be obvious or I may be way off base. I would like to hear other’s thoughts on this.

That is an excellent point about the use of the clean pull from the hang? I will have to think on that?