“I believe that from an untrained state, a muscle’s residual tension can be increased to a certain point, but any visual changes would be marginal at best”.
What is the process by which that happens and if it occurs up to a certain point what limits it?
“Actually, Dr. Fred Hatfield discusses this in some of his texts. He says that muscle “tone” is basically the increased tension a muscle holds at all times (i.e. relaxed). As alluded to in another post, this comes from training for size/strength”.
Muscle tone is the residual tension in relaxed muscle. It is not increased tension. It obviously does not
come from training for size and strength as all healthy untrained individuals have it. You may be asserting that increased tone comes from such training which is a different matter.
“You’re muscles can become more dense over time. For instance, now I’m about the same weight at 21 as I was being a senior in HS, although my muscles are much more dense and I’m capable of lifting a lot more”.
Define dense if this does not mean that you have gained muscle and lost fat. What are you saying about muscle tone?
I have read nothing which suggests that muscle tone is other than an involuntary neurological phenomenon and nothing that suggests that it is amenable to change through weight training.
The idea of weight training increasing muscle hardness belongs in the same category as high reps increasing muscle definition -which I see from above is still believed by some.