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Last night's core work included jackknives.
Are they on the "bad exercise" list?
Are they on the "bad exercise" list?
My low back was injured in the past on a badly executed deadlift attempt. I've also had back spasms.
I've had no issues with Jefferson Curls, which I started trying out years after those injuries. I often do them empty-handed. Sometimes I'll hold a bag loaded with some soup cans. I started doing them to try to improve hamstring flexibility. From what I understand, the purpose of the weight is to help stretch out those hammies a little more. I don't know of any coach that I trust who thinks going heavy in this move is a good idea.
Pavel Tsatsouline teaches a similar looking exercise in his Resilient video, using a light KB.
I was hip hinging just to lift up toilet seats.
It depends on where you're coming from. It's great to be able to flex your lumbar at will in the course of daily activities. I don't - I used up my lifetime's worth of flexing my lumbar in the course of daily activities, effective October 23, 1997, when my disc blew. Early on in my recovery, I learned it just wasn't going to work for me any longer.I do that too, is there something particularly wrong with it? Shouldn't you generally do daily tasks the same way you lift?
Good to read Stu McGill on this, IMO. He talks about certain activities being "self-selecting," and long-distance, high performance cycling, e.g., Tour de France riders, seems to be at or near the top of his list. His point is simple enough - as a generalization, that posture is bad for people, and the people who you see riding the TdF are those who, for whatever reason, have adapted.In this video on the Jefferson curl, this guy cites some studies about how how mileage cyclists had healthier lumbar spinal tissue adaptations.
I switched to an Electra Cruiser bike, my back is a lot happier, although you aren’t getting anywhere too fast on it.My personal experience - my back never feels better than after I've been on the bike all day. And then a few hours later or the next day, all hell breaks loose, no matter how careful I am post-ride. I've stopped riding as a result except perhaps once or twice a year, but I was a pretty serious roadie for a couple of decades or so.
There are only so many things I have time for, bike just isn't going to be one of them for me. Besides, I loved being a roadie - the position felt great to me. If I was ever going to try it again, I'd just work on my position on a road bike - I had a custom frame made for myself, a road bike from the last century that weighed 16 lbs, ready to ride, out of fillet-brazed steel. It's a think of beauty and I do miss riding it.I switched to an Electra Cruiser bike, my back is a lot happier, although you aren’t getting anywhere too fast on it.
I would say this is a core - no pun intended - principle here at StrongFirst. Too many people are focused on the front abs muscles, six-pack and all that, when the TVA is really what you need to be strong. And my personal theory is that strength frees up mobility - well, it's not an original thought, I know - and that increase "core" strength, in this case the TVA, will then facility better mobility in the hip and hamstrings. I'm a good example - deadlifting and splits really happened together for me.My TVA was also a bit "sleepy" -- improving that also dramatically improved my pelvic control, which improved my hip mobility, which also improved my hamstring mobility, which improved my hinges.
I used to be able to do these... "Pike-Ups" w. a "powerwheel" (ab wheel you put on your feet) or with a TRX are also great - I can still do those, sorta.
If you live in an apartment (as most people in my area do) your street address will look like that: Street Name Building Number Apartment Number, e.g. "Jefferson Avenue 30/17" (order may vary, of course). Many people routinely mix these up, giving an apartment number as a building number and vice versa. Sometimes it's just annoying, but it's problematic when the reversed address is also real.You have my curious… what does it actually mean?
That's a funny story. Most apartments I've lived in here in the US are Building Number - Street - Apartment Number, e.g. 57 N Jefferson Apt C. I can see how if it was 57/C (or how its done where you are) could be a little more confusing. Thanks for answering!If you live in an apartment (as most people in my area do) your street address will look like that: Street Name Building Number Apartment Number, e.g. "Jefferson Avenue 30/17" (order may vary, of course). Many people routinely mix these up, giving an apartment number as a building number and vice versa. Sometimes it's just annoying, but it's problematic when the reversed address is also real.
What I've eventually learned is why this happens so often: these people have their addresses memorized like a random string of characters, the same way you would memorize a phone number; they fail to realize that both 30 and 17 aren't there by chance, but signify specific things in physical space, in other words, they couldn't tell you what either of these numbers taken alone actually means. So obviously, just as you or me could misremember a phone number starting with 510 as 501 or even 150, it's easy for them to misremember the 30/17 address as 17/30.
And that's the better ones. My friend who's still in the business recently delivered to a guy who didn't know his apartment number at all. She asked him to go outside and tell her the number on his front door. Unfortunately, there wasn't one. Undaunted, she asked for the numbers on the neighbors' doors. On the left there was a 56, on the right, 58. Apparently he was still mystified as to how she divined his own apartment number from this information.
Interesting, is it common to have apartments distinguished by letters instead of numbers stateside? That would be certainly harder to mix up, but wouldn't fly in my area where buildings can have dozens or hundreds apartments each.Most apartments I've lived in here in the US are Building Number - Street - Apartment Number, e.g. 57 N Jefferson Apt C
At the risk of repeating myself.... If you don't use it, you lose it. If you only train within a certain ROM for any joint, don't be surprised when you injure yourself outside of that ROM. Obviously if someone has an injury, their case should be evaluated individually.I remember @kennycroxdale posted an article on this topic about an experiment where back flexion strength was measured across powerlifters and regular people and the powerlifters demonstrated no superior strength to an untrained individual.
That being said, Tommy Kono used to do his deadlifts, which seem similar to Jefferson DLs, for this specific reason - as “chaos training.” Louie implemented round back good mornings, perhaps for similar reasons, as I’m not sure such an exercise would aid in a properly executed lift.