JMBS
MVP,
What's the word on the knee-flexion only popliteus muscle? Deads aren't going to work that but the GHRs or curls would. How important is it to isolate and develop that muscle? Thx!
It's important that you work the antagonist of all your exercises. I've heard Danmirage many times in his posts mention on how he too shares the same opinion that deadlifts and back squats are nowhere near enough especially from a physiology stand-point.
Politeus, gracillis and the sartorius (which is part of the quads, also the longest muscle in the human body) are the
secondary knee flexors. The primary knee flexors are the hamstrings. It's their roll in relation to the human body, their primary roll is to flex the knee and the movements in which they are overloaded are reflective of this.
The best way to work a muscle to the extent of overload is by performing it's primary function.
Squats and deadlifts require the hamstrings to be eccentric stabilizers.. whilst the stimulus to the hamstrings is there, they are recruited, it cannot be compared to the stimulus on the other side of the joint where they would respond as primary concentric movers. I'm speaking from a physiology stand-point as well as a joint balance standpoint.
If you would do nothing but barbell curls and avoid tricep extensions, what is that? Potential elbow imbalance. The elbow flexors being stronger than the elbow extensors leading to potential elbow injury. Same philosophy applies with the knee which is also a synovial joint.
As far as isolating them goes, you're not. While it is an isolation exercise, it also targets the gluteus maximus, the adductor magnus, popliteus and the gastrocnemius, and other muscle groups that act as synergists and the erector spinae that would act as a stabilizer.
Edit: I'm talking about a glute-hamstring raise (GHR) not a hamstring curl.
<message edited by MVP on Wednesday, August 19, 2009 12:29 PM>