New answers tagged squats
The real answer is oxygen debt during the set. It is the same effect as with sprinting all-out. http://medical-dictionary.thefreedictionary.com/oxygen+debt
You can do Goblet Squats (https://www.youtube.com/watch?v=0WrvQ2LEyGw) until your scapula is resistant enough.
Deadlifting and Lunges are good go-tos for glute-development You can also look if your gym has a Roman Chair available: http://en.wikipedia.org/wiki/Roman_chair
I'm not sure what the rest of your workout looked like, and how close you were to your 1RM max, and those matter. 90 kilos doesn't mean much, since that might be 80% or 40% of your max, which is much more relevant. Either way, 10 sets of 10 reps is a lot of volume. That's 100 weighted squats, whereby most programs that are volume heavy will come in around ...
For reference, here's a 2013 meta analysis from Chris Beardley on the various muscle recruitments (checked by EMG) during squats. There's not much there that really answers your question directly, but it's still a worthwhile read on the topic, especially because it graphs different levels of involvement across individual muscles in different squat stances. ...
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