Rumpfstärkung erfolgt meiner Meinung nach bei jeder der 3 Übungen, besonders bei der Beuge und bei den pausierten Varianten. Der Mythos bezog sich einzig und alleine auf den Gürtel - neue Forschungen zeigen sogar ein höhere Muskelaktivierung beim Tragen eines Gürtels, da die Muskeln etwas haben gegen das sie aktiv drücken können. Ich kann eben nur immer wieder feststellen, dass sich mein unterer Rücken nach einer Trainingseinheit ohne Gürtel grausam anfühlt - und zwar in genau dem Bereich in dem ich meine Bandscheibenprotrusion habe.
Wobei man Rumpfstärkung nicht mit Bauchkraft verwechseln darf, der untere Rücken bzw die hintere Kette wird hervorragend gestärkt nur die Bauchmuskulatur erhält recht wenig Stimulus.
Hier ein Auszug aus einem längeren Artikel
Squats and deadlifts do work many of the core muscles. But it’s mainly the ones in your back, especially the spinal erectors – those cable-like muscles that run up either side of your spine.
In fact, squats and deadlifts do a better job at working the spinal erectors than the
quadruped,
pelvic thrust,
side bridge and
back extension exercises performed on a Swiss ball [3, 6].
During the deadlift in particular, they work very hard to keep your spine in its naturally arched position. Powerlifters have such well-developed spinal erectors mainly because of all the work those muscles do to prevent the spine from bending.
Squats and deadlifts are just fine for developing the posterior aspects of the core. Quadratus lumborum, a small but important muscle in the lower back that helps to stabilize the spine, is also heavily involved during the deadlift [4].
However, neither exercise does much for the anterior core, which is currently the trendy way to refer to the abs.
The figure below comes from Dr. Jeffrey McBride, a Professor in Biomechanics at Appalachian State University. He measured muscle activation in the abdominal muscles of trained lifters performing a number of different exercises.
As you can see, squats and deadlifts – even when you’re using a heavy weight that’s 80-90% of your 1-RM – don’t hit rectus abdominis particularly hard.
In fact, the overhead press triggers greater rectus abdominis activity than both the deadlift and squat [7]. But it’s still relatively low (around 10% of its MVC) compared to exercises like
the rollout or even the curl-up.
Similar results are reported in a trial involving a group of elite male rugby union players [11].
These were reasonably strong guys, sitting roughly halfway between “intermediate” and “advanced” in terms of squat strength. Not the typical “untrained beginner” often used in this type of study.
The researchers measured muscle activity in the abdominals during the squat, overhead squat, as well as during various abdominal exercises.
Once again, rectus abdominis didn’t have to work very hard during the squat – only around 10% of its maximum. In fact, the researchers found “substantially larger” abdominal muscle activity during the plank, sit-up and jackknife.
Someone who can perform a standing overhead press with their bodyweight and deadlift twice their bodyweight will have developed a very high level of core strength simply by focusing on getting stronger in both exercises.
But for complete core development, squats, deadlifts and presses aren’t enough, and you’ll need exercises that work the abs directly. I’ve
listed some of my favorite ones here.
Hier der ganze Artikel :
http://muscleevo.net/how-to-build-a-core-of-steel/