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Compartment syndrome is a condition in which increased pressure within one of the body's anatomical compartments results in insufficient blood supply to tissue within that space. There are two main types: acute and chronic. Compartments of the leg or arm are most commonly involved.
Lung volumes and lung capacities refer to the volume of air in the lungs at different phases of the respiratory cycle.
A Likert scale is a psychometric scale named after its inventor, American social psychologist Rensis Likert, which is commonly used in research questionnaires. It is the most widely used approach to scaling responses in survey research, such that the term is often used interchangeably with rating scale, although there are other types of rating scales.
Pilates is a type of mind-body exercise developed in the early 20th century by German physical trainer Joseph Pilates, after whom it was named. Pilates called his method "Contrology". It is practiced worldwide, especially in developed countries such as Australia, Canada, Germany, South Korea, New Zealand, the United Arab Emirates, the United Kingdom, and the United States. Pilates uses a combination of around 50 repetitive exercises to spur muscle exertion. Each exercise flows from the "five essentials": breath, cervical alignment, rib and scapular stabilization, pelvic mobility, and utilization of the transversus abdominis. Each exercise is typically repeated three to five times. As of 2023, over 12 million people practice Pilates.
Delayed onset muscle soreness (DOMS) is the pain and stiffness felt in muscles after unaccustomed or strenuous exercise. The soreness is felt most strongly 24 to 72 hours after the exercise. It is thought to be caused by eccentric (lengthening) exercise, which causes small-scale damage (microtrauma) to the muscle fibers. After such exercise, the muscle adapts rapidly to prevent muscle damage, and thereby soreness, if the exercise is repeated.
V̇O2 max (also maximal oxygen consumption, maximal oxygen uptake or maximal aerobic capacity) is the maximum rate of oxygen consumption attainable during physical exertion. The name is derived from three abbreviations: "V̇" for volume (the dot over the V indicates "per unit of time" in Newton's notation), "O2" for oxygen, and "max" for maximum and usually normalized per kilogram of body mass. A similar measure is V̇O2 peak (peak oxygen consumption), which is the measurable value from a session of physical exercise, be it incremental or otherwise. It could match or underestimate the actual V̇O2 max. Confusion between the values in older and popular fitness literature is common. The capacity of the lung to exchange oxygen and carbon dioxide is constrained by the rate of blood oxygen transport to active tissue.
Overtraining occurs when a person exceeds their body's ability to recover from strenuous exercise. Overtraining can be described as a point where a person may have a decrease in performance and plateauing as a result of failure to consistently perform at a certain level or training load; a load which exceeds their recovery capacity. People who are overtrained cease making progress, and can even begin to lose strength and fitness. Overtraining is also known as chronic fatigue, burnout and overstress in athletes. It is suggested that there are different variations of overtraining, firstly monotonous program over training suggest that repetition of the same movement such as certain weight lifting and baseball batting can cause performance plateau due to an adaption of the central nervous system which results from a lack of stimulation. A second example of overtraining is described as chronic overwork type training where the subject may be training with too high intensity or high volume and not allowing sufficient recovery time for the body. Up to 10% of elite endurance athletes and 10% of American college swimmers are affected by overtraining syndrome.
Oligomenorrhea is infrequent menstrual periods. Generally the menstrual periods occur at intervals of greater than 35 days, with less than 9 periods in a year, where previously there had been a regularly established pattern. The period may be light or short in duration, and irregular.
High-intensity interval training (HIIT) is a training protocol alternating short periods of intense or explosive anaerobic exercise with brief recovery periods until the point of exhaustion. HIIT involves exercises performed in repeated quick bursts at maximum or near maximal effort with periods of rest or low activity between bouts. The very high level of intensity, the interval duration, and number of bouts distinguish it from aerobic (cardiovascular) activity, because the body significantly recruits anaerobic energy systems. The method thereby relies on "the anaerobic energy releasing system almost maximally".
Excess post-exercise oxygen consumption is a measurably increased rate of oxygen intake following strenuous activity. In historical contexts the term "oxygen debt" was popularized to explain or perhaps attempt to quantify anaerobic energy expenditure, particularly as regards lactic acid/lactate metabolism; in fact, the term "oxygen debt" is still widely used to this day. However, direct and indirect calorimeter experiments have definitively disproven any association of lactate metabolism as causal to an elevated oxygen uptake.
The metabolic equivalent of task (MET) is the objective measure of the ratio of the rate at which a person expends energy, relative to the mass of that person, while performing some specific physical activity compared to a reference, currently set by convention at an absolute 3.5 mL of oxygen per kg per minute, which is the energy expended when sitting quietly by a reference individual, chosen to be roughly representative of the general population, and thereby suited to epidemiological surveys. A Compendium of Physical Activities is available online, which provides MET values for hundreds of activities.
Exercise-induced bronchoconstriction (EIB) occurs when the airways narrow as a result of exercise. This condition has been referred to as exercise-induced asthma (EIA); however, this term is no longer preferred. While exercise does not cause asthma, it is frequently an asthma trigger.
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.
The visual analogue scale (VAS) is a psychometric response scale that can be used in questionnaires. It is a measurement instrument for subjective characteristics or attitudes that cannot be directly measured. When responding to a VAS item, respondents specify their level of agreement to a statement by indicating a position along a continuous line between two end points.
The central governor is a proposed process in the brain that regulates exercise in regard to a neurally calculated safe exertion by the body. In particular, physical activity is controlled so that its intensity cannot threaten the body’s homeostasis by causing anoxic damage to the heart muscle. The central governor limits exercise by reducing the neural recruitment of muscle fibers. This reduced recruitment causes the sensation of fatigue. The existence of a central governor was suggested to explain fatigue after prolonged strenuous exercise in long-distance running and other endurance sports, but its ideas could also apply to other causes of exertion-induced fatigue.
Human locomotion is considered to take two primary forms: walking and running. In contrast, many quadrupeds have three distinct forms of locomotion: walk, trot, and gallop. Walking is a form of locomotion defined by a double support phase when both feet are on the ground at the same time. Running is a form of locomotion that does not have this double support phase.
Fitness instructors rely heavily on the use of music during their class as a way of motivating their clients. In addition to making physical activity and exercise more enjoyable, athletes have used music as an ergogenic aid. Most of the studies that have explored the effects of music on performance was aerobic performance. Aerobic performance is assessed by measuring specific parameters of, such as maximal oxygen consumption (VO2 max), heart rate (HR), rate of perceived exertion (RPE), and blood lactate (mmol/ L), power output (W). There is conflicting data regarding the effects of music on aerobic performance. On one hand, studies have suggested that music does increase aerobic exercise performance by influencing certain parameters, such as rate of perceived exertion and time to exhaustion. However, there are studies that rebuke this notion, stating that music had no effect on aerobic performance. The reason for this disparity among data is the construction of the tests themselves. There are several factors that need to be taken into account when exploring the effects of music on exercise. Those include: exercise intensity, the subject experience in performing exercise, and type of music.
Central nervous system fatigue, or central fatigue, is a form of fatigue that is associated with changes in the synaptic concentration of neurotransmitters within the central nervous system which affects exercise performance and muscle function and cannot be explained by peripheral factors that affect muscle function. In healthy individuals, central fatigue can occur from prolonged exercise and is associated with neurochemical changes in the brain, involving serotonin (5-HT), noradrenaline, and dopamine. The roles of dopamine, noradrenaline, and serotonin in CNS fatigue are unclear, as pharmacological manipulation of these systems has yielded mixed results. Central fatigue plays an important role in endurance sports and also highlights the importance of proper nutrition in endurance athletes.
Exertional rhabdomyolysis (ER) is the breakdown of muscle from extreme physical exertion. It is one of many types of rhabdomyolysis that can occur, and because of this, the exact prevalence and incidence are unclear.
In kinesiology, the ventilatory threshold (VT1) refers to the point during exercise at which the volume of air breathed out (expiratory ventilation) starts to increase at an exponentially greater rate than VO2 (breath-by-breath volume of oxygen (O2)). VT1 is thought to reflect a person's anaerobic threshold — the point at which the oxygen supplied to the muscles no longer meets its oxygen requirements at a given work rate — and therefore lactate threshold — the point at which lactate begins to accumulate in the blood, because with ongoing dependence on anaerobic glycolysis, increasing amounts of CO2 need to be exhaled to accommodate its production during the conversion of lactic acid to lactate.
References
- ↑ Borg GA (1982). "Psychophysical bases of perceived exertion". Med Sci Sports Exerc. 14 (5): 377–81. doi: 10.1249/00005768-198205000-00012 . PMID 7154893.
- ↑ Borg G (1970). "Perceived exertion as an indicator of somatic stress". Scand J Rehabil Med. 2 (2): 92–8. doi: 10.2340/1650197719702239298 . PMID 5523831.
- 1 2 Dawes HN, Barker KL, Cockburn J, Roach N, Scott O, Wade D (2005). "Borg's rating of perceived exertion scales: do the verbal anchors mean the same for different clinical groups?". Arch Phys Med Rehabil. 86 (5): 912–6. doi:10.1016/j.apmr.2004.10.043. PMID 15895336.
- ↑ Roelands B, de Koning J, Foster C, Hettinga F, Meeusen R (May 2013). "Neurophysiological determinants of theoretical concepts and mechanisms involved in pacing". Sports Med. 43 (5): 301–311. doi:10.1007/s40279-013-0030-4. PMID 23456493. S2CID 30392999.
A component that appears to integrate many variables during whole-body exercise is the rating of perceived exertion (RPE) [15]. ...
15. Borg, Gunnar (1982). "Psychophysical bases of perceived exertion". Medicine and Science in Sports and Exercise. 14 (5): 377–81. doi: 10.1249/00005768-198205000-00012 . PMID 7154893.{{cite journal}}: External link in|quote= - ↑ Rattray B, Argus C, Martin K, Northey J, Driller M (March 2015). "Is it time to turn our attention toward central mechanisms for post-exertional recovery strategies and performance?". Front. Physiol. 6: 79. doi: 10.3389/fphys.2015.00079 . PMC 4362407 . PMID 25852568.
Aside from accounting for the reduced performance of mentally fatigued participants, this model rationalizes the reduced RPE and hence improved cycling time trial performance of athletes using a glucose mouthwash and the greater power output during a RPE matched cycling time trial following amphetamine ingestion
- ↑ Chambers, E. S.; Bridge, M. W.; Jones, D. A. (15 April 2009). "Carbohydrate sensing in the human mouth: effects on exercise performance and brain activity". The Journal of Physiology. 587 (8): 1779–1794. doi:10.1113/jphysiol.2008.164285. PMC 2683964 . PMID 19237430.
- ↑ Grant, S.; Aitchison, T.; Henderson, E.; Christie, J.; Zare, S.; McMurray, J.; Dargie, H. (1999). "A Comparison of the Reproducibility and the Sensitivity to Change of Visual Analogue Scales, Borg Scales, and Likert Scales in Normal Subjects During Submaximal Exercise". Chest. 116 (5): 1208–1217. doi:10.1378/chest.116.5.1208. PMID 10559077.
- 1 2 "Measuring Physical Activity Intensity". CDC. 2019-02-18.
- ↑ Olsson, k.; Ceci, R.; Wahlgren, L.; Rosdahl, H.; Schantz, P. (2024). "Perceived exertion can be lower when exercising in field versus indoors". PLOS ONE. 19 (5): e0300776. Bibcode:2024PLoSO..1900776O. doi: 10.1371/journal.pone.0300776 . PMC 11135770 . PMID 38809815.
- ↑ "The Borg Rating of Perceived Exertion (RPE) scale". academic.oup.com. Retrieved 2024-04-11.