Thanks..
I will try this toe technique... Sorry, Can you explain "coming up out of the hole"
I make sure to do at least 3 proper squats already. The next two are for adding the weights...
Also this glute ham raise looks awesome (I just googled).. My gym don't have the exact machine but we do have a similar machine for doing lower back.. Same raise, but only from the hips.. I will see it it adjusts for glute ham..
PS: On builds and running. My bro-in-law is a habitual marathon runner. He has run all the NY Boroughs, SFO, what not.. Except for Boston.. And he is pretty well built... Brad Pitt/Tom Cruise type fit.. He used to weight train though... so just saying that MArathon runner need not be wiry .. I myself am only doing Sprints outdoors when I really want to run.. HIIT is what I am trying...
You should try to do all your squat sets below parallel, at least at this kind of level. There's no benefit to doing your work set with a partial ROM, it also means the depth of your squats varies session to session (an inch or two makes all the difference, and getting "at least parallel" is much easier to spot).. Basically not squatting past parallel makes linear progression much harder, and will also mean you generate muscular imbalances in your legs (likely lots of quad development, minimal hamstring/glute development).
The best way to improve your balance and core development is to squat below parallel. Leave your ego at the door and go deep. If you can't go deep for a weight, it's too heavy.
If your 340's are looking like this:
[ame=http://www.youtube.com/watch?v=LFOouu4YcUE]1/4 Squat - YouTube[/ame]
Then it's wayyyy too heavy.
Squatting with partial ROM has its uses, but that's usually for powerlifters working on their 1RM's, who have certain sticking points (or just to try and get used to working with a heavier bar than you normally would for your worksets).