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my education as a physiotherapist
So that mean you can start fire with your thoughts.
my education as a physiotherapist
Just about wrapping up my education as a physiotherapist, with most of my interest being in biomechanics, physiology and neurology. I'm writing my bachelors in brain trauma in a few month and then I think I'll get a masters in human physiology or neuroscience, and probably a PhD down the road too. I'll wait a few years because I want to work and get some experience first, but I'm really excited about learning more and growing!
Thanks man!ok, you know your stuff. cool. the discussions of the physios who actually work out are always an insight. thanks and good luck!
Great stuff thanks. The calf thing is bilateral. Upper body strength/size gains are normal if not above average. Hes benching a bit over 2x BW and put on considerable size.So what you are asking is if nerve damage at a specific location can reduce your strength adaptions in other areas of the body? There's a bit to unpack there.
When it comes to localised nerve damage, it's related to individual nerves and would most likely only effect a specific area or muscle(s). I'm sure there would be some sort of interplay with other nerves that might impact strength adaptions in other areas negatively, but it's not completely understood. The majority of the symptoms would be localised. The relationship between nerve damage and strength loss is pretty clearly defined. This study is really interesting in that regard:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4375416/
Peripheral damage can be systemic as well though, like in diabetes with or without polyneuropathologies (basicly just means that many nerves are effected) as a result of something like arteroschlerosis (plaque in the arties resulting in less oxygenated nerve fibers and hence damage) throughout the body, or in various other conditions like Multiple Schlerosis.
Otherwise if the muscle weakness is systemic or distributed over different sections of the body it's usually a problem in the CNS, primarily the brain. Brain damage can impact many muscles in accordance to which part of the mortor cortex that's damaged. Also other neurological diseases in the brain can cause loss of strength more systematically.
So, to answer your question. There's no reason why the guy who had his leg amputated would experience any significant strength loss in other areas of his body if the reason was stricly something localised in that leg, which is now removed. Then again It might effect the interplay as a disruption in muscle co-ordination could decrease expression of strength. He probably has some imbalances and compensations, but he should be able to improve.
The guy who has basicly no calf muscles (I assume it's bilateral?), you'd want to know what his diagnosis is, but if it's an active nerve pathology that effects both his lower limbs then it'd make sense that he might not progress as fast in his lower body. Strength training can still be used to not regress though and as preventive measure. If he's also experiencing less muscle strength in the upper body and you are asking if that's related, then I'd say it might be to some degree, but that it could be other factors as well. It depends on what the actual cause is, ie his diagnosis, but it could just be something else geneticly which is limiting him.
That would be my take, did it make sense?
No problem!Great stuff thanks. The calf thing is bilateral. Upper body strength/size gains are normal if not above average. Hes benching a bit over 2x BW and put on considerable size.
Spinal lipoma removal caused scar tissue that lead to a tethered cord. The tethered cord operation lead to the nerve damage.No problem!
Yeah okay, that makes total sense that his legs are affected. Would be interesting to know what his diagnosis is, if it happens to come up!
I see. Interesting. So I'm guessing the operation to un-teather the cord was near the low back/tailbone? Do you know if the damage occured near a spinal root segment, or further down the leg?Spinal lipoma removal caused scar tissue that lead to a tethered cord. The tethered cord operation lead to the nerve damage.
Here’s Jeremy Loenneke’s paper arguing strength exercises do not improve sports as there’s little evidence but may aid in injury prevention.
He did a lot of research on exercising with cutting off blood circulation as a novel way to increase hypertrophy. He doesn’t believe hypertrophy equates to increased strength. He argues for specificity which Brad Schoenfeld’s research shows both high load and low load can both increase hypertrophy but heavy weights increase strength while higher reps with low weights increases hypertrophy. At least that’s what I get out of it.
Jeremy seems to be a contrarian.
http://www.medical-hypotheses.com/article/S0306-9877(17)31110-6/pdf
Resistance exercise is typically performed to increase both muscle size and strength and is regularly incorporated into training programs for sports performance. Presumably, the exercise would be expected to increase the force producing capabilities of skeletal muscle, which may have subsequent influence on various sports related abilities. Interestingly, few studies are designed to examine sports related benefits of resistance exercise while including a proper control group to account for adaptations to simply performing the sports related task. Much of our knowledge on resistance exercise for sport is based off cross-sectional work showing that stronger athletes tend to perform at the highest level, along with cross-sectional work demonstrating that higher levels of strength are associated with various performance related parameters. Although there is a large body of cross-sectional literature providing a rationale for resistance exercise for sport, its implementation is largely based on the following: 1) An increase in muscle size will produce an increase in strength and 2) a stronger muscle will increase sports performance. However, there is a lack of evidence to support these assumptions. The weight of evidence suggests that resistance exercise may indirectly impact sports performance through injury prevention, as opposed to directly improving sport related abilities.
I believe he's also pretty strongly anti-periodization
That doesn't seem right. I'm pretty sure there is a bunch of studies showing team-sports athletes who supplement with resistance training increase their athletic abilities (e.g. their vertical jump or their linear acceleration) more compared to similar team-sports athletes who do not engage in resistance training.Interestingly, few studies are designed to examine sports related benefits of resistance exercise while including a proper control group to account for adaptations to simply performing the sports related task. Much of our knowledge on resistance exercise for sport is based off cross-sectional work showing that stronger athletes tend to perform at the highest level, along with cross-sectional work demonstrating that higher levels of strength are associated with various performance related parameters.
I got into a small debate with Beardley in fb comments (I posted the link here a while back). He did reply to my comments, but his reply showed ignorance of basic scientific concepts (like the statistical power of a study, statistical vs clinical significance, and meaningful effect sizes). He is clearly a hard-working dude, but hardly a reliable source.Yes, he does not believe there’s any scientific evidence that proves periodization works. It’s odd because even Brad Schoenfeld who does research and other researchers do experiments on periodization but Jeremy’s attitude is that the studies or experiments are flawed. Jeremy doesn’t even believe partial or full squats improve jumping or sprinting which Chris Beardley who creates infographics which I think Sano actually questioned Chris on the veracity of the study’s results on Facebook. Chris at least will,answer your questions and he’s pretty humble but Jeremy is very contrarian and combative on social media if you question him.
That doesn't seem right. I'm pretty sure there is a bunch of studies showing team-sports athletes who supplement with resistance training increase their athletic abilities (e.g. their vertical jump or their linear acceleration) more compared to similar team-sports athletes who do not engage in resistance training.
Which sport(s) are you referring to?
Link and/or study name?The study come from Jeremy Loenneke et al. Not my comments. He claims strength training has lacking scientific evidence in improving sports performance. He doesn’t believe in periodization either. He’s a contrarian though he made his name in blood restriction studies on increasing hypertrophy.
Yeah, as much as I appreciate the work Beardsley is doing, he doesn't really delve into the validity of the studies he uses. I've talked to him about it as well and he admits as much. At the same time, with the sheer volume of litterature he goes through his overaching conclusions are, usually, quite reasonable. He's not afraid to find opposing viewpoints either and I commend him for that. It's a very important task which most researchers are too biased to do. His longer articles are also very good, and I like his work on contractile velocity and angle specific strength.I got into a small debate with Beardley in fb comments (I posted the link here a while back). He did reply to my comments, but his reply showed ignorance of basic scientific concepts (like the statistical power of a study, statistical vs clinical significance, and meaningful effect sizes). He is clearly a hard-working dude, but hardly a reliable source.