strangedejavu wrote:Thanks for the detailed reply Mr. Kurz. I was also wondering about other non-kicking styles like jiu-jitsu or judo. [...] If I'm looking at a school for one of the grappling arts, what should I look for in terms of only teaching moves that students are strong enough to safely execute.
strangedejavu wrote:I remember you saying somewhere that grapplers might find the 2x body weight recommendation to be excessive. However, it would still take a robust back to pick up an opponent or grab an opponent and throw him (or her, but I try to be a gentleman).
strangedejavu wrote:How much back strength would you recommend for one of these arts?
strangedejavu wrote: [...] is there a safe way of finding 1RM for the deadlift without supervision?
REG wrote:The problem with doing stiff-legged deadlifts, while keeping your back straight, is that you will be exercising or strengthening the hamstrings and gluteus maximus muscles more so, than the erector spinae or lower back muscles.
REG wrote:So wouldn't you develop more lower back strength by rounding your lower back at the beginning position and then arching at the ending position for each rep?
REG wrote:Why would strengthening the lower back muscles counteract the hip flexors? I thought it was the hamstrings and glutes that are the antagonists to the hip flexors (especially the ilipsoas muscle groups).
REG wrote:In fact, wouldn't strengthening the erector spinae or lower back muscles actually contribute to more arching of the lower back along with the hip flexors pulling at the front of the lower spine?
dragon wrote:REG wrote:
The problem with doing stiff-legged deadlifts, while keeping your back straight, is that you will be exercising or strengthening the hamstrings and gluteus maximus muscles more so, than the erector spinae or lower back muscles.
Every compound exercise involves other muscles.From what you say,that would mean the bench press is no good for chest as it involves(and fatigues more) the delts and triceps.Even "isolation" exercises can never truly isolate.Performing a bicep curl requires your forearm to grip the weight.
Even if it were possible to isolate the lower back,what would that achieve?-You aren't isolating the lower back when you perform a kick,punch,etc...The core,hamstrings,glutes,hip flexors,etc will always have involvment so it's more practical to do a compound movement than an isolation one.This teaches the body to work as a unit as opposed to being a collection of strong body parts that have never worked together.
REG wrote:
So wouldn't you develop more lower back strength by rounding your lower back at the beginning position and then arching at the ending position for each rep?
No.Rounding your lower back in the bottom position would be stretching the ligaments of the spine.Arching at the top would be hyper-extending......If you choose to perform the movement that way,it is your own risk to take.There is more than enough information out there to find out why these are dangerouse practices.
dragon wrote:REG wrote:
Why would strengthening the lower back muscles counteract the hip flexors? I thought it was the hamstrings and glutes that are the antagonists to the hip flexors (especially the ilipsoas muscle groups).
The illiopsoas consists of the psoas and the iliacus-The iliacus connects to the hip bone.The psoas connects to the lower back.
dragon wrote:REG wrote:
In fact, wouldn't strengthening the erector spinae or lower back muscles actually contribute to more arching of the lower back along with the hip flexors pulling at the front of the lower spine?
No.It's the tightness/dominance of the hip flexors that cause the lower back to arch(lordosis).A strong lower back will counter this.
Dragon.
REG wrote:This all true, but I thought that in order to fully strengthen the erector spinae muscles you would need to exercise it dynamically and not isometrically.
REG wrote:Also, if you keep your back straight throughout the entire range of those movements, then why don't you do so when you do back extensions on the floor?
REG wrote:dragon wrote:REG wrote:
Why would strengthening the lower back muscles counteract the hip flexors? I thought it was the hamstrings and glutes that are the antagonists to the hip flexors (especially the ilipsoas muscle groups).
The illiopsoas consists of the psoas and the iliacus-The iliacus connects to the hip bone.The psoas connects to the lower back.
Soooo.....how does that make the erector spinae muscles become the antagonists to the iliacus and psoas muscles? Aren't there antagonists still the hams and glutes?dragon wrote:REG wrote:
In fact, wouldn't strengthening the erector spinae or lower back muscles actually contribute to more arching of the lower back along with the hip flexors pulling at the front of the lower spine?
No.It's the tightness/dominance of the hip flexors that cause the lower back to arch(lordosis).A strong lower back will counter this.
Dragon.
Yeah, but exactly how would the erector spinae muscles reduce the lordosis?
Thomas Kurz wrote:One simple and safe method of testing one's 1 RM is described in Science of Sports Training on page 360. But why test? If one keeps on training, doing deadlifts in sets of 6 to 12, gradually increasing the weight, then eventually there will be 2x one's body weight on the bar and one will have no problem doing several such sets with this weight.
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