Talk:Exertion

message: I will be contributing to this article! Although it is challenging to find a formal definition that doesn't require reference to numerous other physical topics, I think that exertion itself can be well described through brief description of the topics already referenced. I also plan to investigate exertion related to exercise physiology, probably primarily neuromuscular exertion and control. 
Zmattingly (talk) 12:45, 24 May 2018 (UTC)
thread_title: Goals

message: The article contains the following paragraph:
In physics exertion is use of energy against, or for, inertia as described by Isaac Newton's First Law of Motion. In mechanics it describes use of force against a body in direction of it's motion (see vector).
I am not aware of the word "exertion" having any formal meaning in physics (although I have not researched the history of physics; perhaps it was used in the past.) Can anyone provide a citation for the use of "exertion" in physics? Gerry Ashton 15:33, 31 May 2006 (UTC)
thread_title: Reference needed

message: This article could use much more information. I have heard of this problem, and I didn't get to learn anything new when I read this article. There has to be new inoformation pertaining to symptoms, examples, and how this can be cured. --Annmohh (talk) 23:25, 28 September 2011 (UTC)
thread_title:  Improvements 

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message: I will be contributing to this page!
IT is challenging to find a concrete definition of exertion, it is very intangible. I think that through discussion of its applications and mechanics it is possible to build an idea of exertion.
I also have made some edits to the information that was already there, to better integrate it to what I am adding. 
Let me know if you have any feedback.
Exertion is the physical or perceived use of energy. Exertion traditionally connotes a strenuous or costly effort, resulting in generation of force, initiation of motion, or in the performance of work. It often relates to muscular activity and can be quantified, empirically and by measurable metabolic response.
Physical
In physics, exertion is the expenditure of energy against, or inductive of, inertia as described by Isaac Newton's third law of motion. In physics, force exerted equivocates work done.[1] The ability to do work can be either positive or negative depending on the direction of exertion relative to gravity. For example, a force exerted upwards, like lifting an object, creates positive work done on that object.[2]
Exertion is often results in force generated, a contributing dynamic of general motion. In mechanics it describes the use of force against a body in the direction of its motion (see vector).
Physiological
Exertion, physiologically, can be described by the initiation of exercise, or, intensive and exhaustive physical activity that causes cardiovascular stress or a sympathetic nervous response. This can be continuous or intermittent exertion.  
Exertion requires, of the body, modified oxygen uptake, increased heart rate, and autonomic monitoring of blood lactate concentrations. Mediators of physical exertion include cardio respiratory and musculoskeletal strength, as well as metabolic capability.[3] This often correlates to an output of force followed by a refractory period of recovery. Exertion is limited by cumulative load and  repetitive motions.
Muscular energy reserves, or stores for biomechanical exertion, stem from metabolic, immediate production of ATP and increased O2 consumption. Muscular exertion generated depends on the muscle length and the velocity at which it is able to shorten, or contract.[4]  
Perceived exertion can be explained as subjective, perceived experience that mediates response to somatic sensations and mechanisms. A rating of perceived exertion, as measured by the RPE-scale, or Borg scale, is a quantitative measure of physical exertion.[5]
Zmattingly (talk) 19:14, 23 June 2018 (UTC)
thread_title: Contributions