Back

ⓘ Exertion is the physical or perceived use of energy. Exertion traditionally connotes a strenuous or costly effort, resulting in generation of force, initiation ..




Exertion
                                     

ⓘ Exertion

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.

                                     

1. Physical

In physics, exertion is the expenditure of energy against, or inductive of, inertia as described by Isaac Newtons third law of motion. In physics, force exerted equivocates work done. 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.

Exertion 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.

                                     

2. 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. 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.

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.

Often in health, exertion of oneself resulting in cardiovascular stress showed reduced physiological responses, like cortisol levels and mood, to stressors. Therefore, biological exertion is effective in mediating psychological exertion, responsive to environmental stress.

Overexertion causes more than 3.5 million injuries a year. An overexertion injury can include sprains or strains, the stretching and tear of ligaments, tendons, or muscles caused by a load that exceeds the human ability to perform the work. Overexertion, besides causing acute injury, implies physical exertion beyond the persons capacity which leads to symptoms such as dizziness, irregular breathing and heart rate, and fatigue. Preventative measures can be taken based on biomechanical knowledge to limit possible overexertion injuries.

                                     
  • Physical strength is the measure of an animal s exertion of force on physical objects. Increasing physical strength is the goal of strength training. An
  • sweating in classic heat stroke while sweating is generally present in exertional heatstroke. Onset can be sudden or gradual. Complications may include
  • temperature range. Once the climate inside the garment warms due to physical exertion or higher ambient temperatures the polymer membrane structure opens up
  • translation of fabrications of exertion The Pali term padhāna is the same as that found in the Four Right Exertions Pali: sammappadhāna Skt.: samyak - pradhāna
  • exceed 40  C 104  F Heat stroke may be non - exertional classic or exertional Significant physical exertion in hot conditions can generate heat beyond
  • their level of exertion relative to a perceived exertion scale. The instructor should advise a recommended exertion scale from 1 no exertion at all to 10
  • compartment syndrome, the pain will not be relieved with rest. In chronic exertional compartment syndrome the pain will dissipate with rest. There are five
  • These activities often involve speed, height, a high level of physical exertion and highly specialized gear. The definition of extreme sports is not exact
  • orthodontic device widen the palate Rating of perceived exertion a scale for assessing perceived exertion during exercise IBM Rational Publishing Engine, a
  • The warming up is a preparation for physical exertion or a performance by exercising or practising gently beforehand. Warming up is performed before a
  • especially if the pain is sudden and severe. They may be caused by general exertion sexual excitement, or contraction of the neck and facial muscles. Most
  • causes of heat exhaustion include: Hot, sunny, humid weather Physical exertion especially in hot, humid weather Due to impaired thermoregulation, elderly
  • point but Kerry hit six without reply and won in the end without great exertion Margaret Lawlor - Slattery scored 0 8. Archived copy Archived from the

Users also searched:

exertion headache, exertion in hindi,

...
...
...