Thank you for taking the time to reply. What does "too much vertical force" mean? Is this relative to "proper running" where more of the force is horizontal e.g. it is less efficient to run slower due to a larger percentage of the force resulting in vertical displacement and not horizontal displacement?
It is not about the efficiency per se. If you just have a bad ratio of vertical forces to horizontal forces, you would be just slower, but could have the same vertical force absorption. Similar to swimming: Being a bad swimmer doesn't make swimming a bad workout. You just get your stimulus with lower speed because of the inefficiency.
You move differently in a way that the force is worse absorbed. (I can't describe it properly without writing a novel) You can test it if you bounce in place as if you would be trotting. Then compare it with rope skipping. Then you get a rough glimpse on what I mean. (Not that rope skipping is a perfect model for proper running!)
After all, it is an informed subjective judgement as any risk to reward judgement. If I pull together all the knowledge on biomechanics, practical knowledge of runners, my experience with clients etc. I come to this conclusion.
Is related to force joints absorb? Is it related to some sort of injury risk?
This is the result of it that I try to avoid.
I'm curious what you are basing this on. Are you a trainer that has applied this and seen results from what you talk about? Are you mostly extending your personal experience? Someone who has read articles that support this? A mix?
I am a trainer and base my opinion on both my experience and the biomechanics of the human gait. However, Sebastian Kaindl (German Trainer) is responsible for drawing my attention to this phenomenon.
Ahhh I get you.
Basically a different word for glucose tolerance and insulin sensitivity.
It is a bit more.
It is your ability to switch between fuels. So, it is also your ability to burn fat at higher intensities, ability to avoid accumulation of intracellular diacylglycerides,...
But practically: Can go with carbs, and can you go without any food? And: How do you feel when you switch fuel.
To give you a practical example: My goal, for me and clients, is to be able to have a full blast cheat day without having any problems the day after other than perhaps a bit more hunger (which should be well tolerated).
What numbers do you shoot for? Eg if you eat 200g of white rice you want blood sugar to be below X at one and two hour mark.
I don't shoot for any number
1. with all measures in place, even high carb meals shouldn't push you into a problematic zone at all.
2. the marginal benefit of controlling for those metrics at the level that I operate is almost zero. It is like a marathon runner with single digit body fat using a DEXA scan once a month. It doesn't give you anything. So, even with clients on a low level, I don't care until all measures are put in place
and problems persist (which is only the case if you have a medical issue).
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