Timewasting exercise trivia: Link-fu

[walkitout]

Think of this as a place I'm storing things that won't stay in my brain when interrupted by my daughter.

First point: is there a difference between dominant and non-dominant side ... grip strength?
10% rule says yes. R. and I present a mixed answer. I'm not quite 10% different (about half that). R. is a lot more than 10% different --- but he broke his non-dominant wrist a few years back and has some pain that it would be unwise to attempt to power through.

Here is Science:

http://www.researchgate.net/profile/Rama_Gedela/publication/215864777_validity_of_10__rule_in_left_hand_dominant_people/links/0922b4f729b297a949000000.pdf

This suggests that the 10% is more or less true ... for right handers. It's a right handed world, so left handers get extra, IRL training on their non-dominant side, thus evening them out?

Check out that table, btw. It has more data on the men vs women which has better grip strength question. The weakest grips recorded ... were in the men.

ETA: Okay, my lovely, but incredibly loud daughter is now playing with Siri, and we have banished her upstairs, because she is _yelling_ really loudly at Siri, in hopes that Siri will understand her if she just speaks louder. Obvs, not gonna work, but we can all now think a little more clearly.

While the initial comments on this post have veered off into a handedness direction, I'm not interested in handedness per se. I'm interested in different performance on one side versus the other (can lift heavier, lighter, the same; can grip the same, harder, less hard), and strategies for modifying those differences (my goal is to even them out) through training.

This is a great example of what I am chasing after:

https://experiencelife.com/article/taking-sides-the-one-sided-strength-workout/

In a typical weight training discussion of symmetry, the focus is on training both sides equally to avoid developing an imbalance. This article recognizes the imbalance pre-exists in many cases, probably from activities of daily living. The focus in this article/approach is one-sided training to compensate? not sure that's the right word.

Obviously, you can imagine lifting with dumbbells vs barbells, and adjusting the weight or reps to even things out if one side is weaker than another. The barbell would let you try to do more of the lift with the strong side (altho you would sort of think that would have an impact on form); the dumbbell less so. I'm looking for something marginally more sophisticated than that.

Comments

[ethelmay.livejournal.com]

I seem to remember reading that being strongly right-handed is mostly genetic, whereas in other people handedness is more influenced by environment. I showed handedness as soon as I was able to hold things voluntarily, despite having a left-handed mother and oldest sister. Mom and A. used to hand me, say, a spoon to play with, automatically putting it in my left hand, and then see me very slowly and painfully transferring it to my right hand. I would expect someone like me to show much greater grip strength in the right hand (dunno if I actually do). Whereas someone like my daughter S., who switched back and forth a good deal before settling on her right hand (to my disappointment -- I rather wanted one lefty), is probably more equal.

This supports what you are saying

[walkitout]

Altho it in no way supports the way that I initially _understood_ what you were saying.

http://www.geneticliteracyproject.org/2014/12/02/left-handedness-genes-and-a-matter-of-chance/

That is, lefthandedness may arise from _lacking_ a genetic bias to righthandedness, which is not precisely the same as "influenced by environment", but maybe by a whole other set of genes that have less strong influence than the underlying right bias.

Re: This supports what you are saying

[ethelmay.livejournal.com]

There are various environmental factors that appear to influence left-handedness -- being a twin is one, which is where I first ran into the idea. (I don't think mirror-image monozygotic twins are common enough to account for twins being more likely to be left-handed, but I haven't read up on the matter in a long time.)

What I suspect is that there is a genetic bias to right-handedness in people like me that, if present, would lead such environmental factors, if present, to have little effect. But it's only a guess. Obviously both the genetic and environmental factors are extremely complicated.