Biology:Non-exercise activity thermogenesis

From HandWiki

Non-exercise activity thermogenesis (NEAT), also known as non-exercise physical activity (NEPA),[1] is energy expenditure during activities that are not part of a structured exercise program. NEAT includes physical activity at the workplace, hobbies, standing instead of sitting, walking around, climbing stairs, doing chores, and fidgeting.[2][3] Besides differences in body composition, it represents most of the variation in energy expenditure across individuals and populations, accounting from 6-10 percent to as much as 50 percent of energy expenditure in highly active individuals.[4]

Relationship with obesity

NEAT is the main component of activity-related energy expenditure in obese individuals, as most do not do any physical exercise. NEAT is also lower in obese individuals than the general population.[4]

NEAT may be reduced in individuals who have lost weight, which some hypothesize contributes to difficulties in achieving and sustaining weight loss.[1]

In Western countries, occupations have shifted from physical labor to sedentary work, which results in a loss of energy expenditure. Strenuous physical labor can require 1500 calories or more per day than desk work.[3]

Relationship with exercise

It is debated whether there is a significant reduction in NEAT after beginning a structured exercise program.[5][6][7]

Health benefits

Lack of NEAT is posited as an explanation for health harms for prolonged sitting.[8]

Measurement

Accelerometers and questionnaires can be used to estimate NEAT.[4]

References

  1. ↑ 1.0 1.1 Silva, Analiza M.; Júdice, Pedro B.; Carraça, Eliana V.; King, Neil; Teixeira, Pedro J.; Sardinha, Luís B. (June 2018). "What is the effect of diet and/or exercise interventions on behavioural compensation in non-exercise physical activity and related energy expenditure of free-living adults? A systematic review" (in en). British Journal of Nutrition 119 (12): 1327–1345. doi:10.1017/S000711451800096X. ISSN 0007-1145. PMID 29845903. https://www.cambridge.org/core/journals/british-journal-of-nutrition/article/what-is-the-effect-of-diet-andor-exercise-interventions-on-behavioural-compensation-in-nonexercise-physical-activity-and-related-energy-expenditure-of-freeliving-adults-a-systematic-review/7207D8767FAAC60158E63E5AF17AC6BA. 
  2. ↑ Saeidifard, Farzane; Medina-Inojosa, Jose R; Supervia, Marta; Olson, Thomas P; Somers, Virend K; Erwin, Patricia J; Lopez-Jimenez, Francisco (March 2018). "Differences of energy expenditure while sitting versus standing: A systematic review and meta-analysis". European Journal of Preventive Cardiology 25 (5): 522–538. doi:10.1177/2047487317752186. PMID 29385357. https://academic.oup.com/eurjpc/article-abstract/25/5/522/5926154. 
  3. ↑ 3.0 3.1 Loeffelholz, Christian von; Birkenfeld, Andreas L. (2022). "Non-Exercise Activity Thermogenesis in Human Energy Homeostasis" (in en). Endotext [Internet]. MDText.com, Inc.. https://www.ncbi.nlm.nih.gov/sites/books/NBK279077/. 
  4. ↑ 4.0 4.1 4.2 Chung, Nana; Park, Mi-Young; Kim, Jisu; Park, Hun-Young; Hwang, Hyejung; Lee, Chi-Ho; Han, Jin-Soo; So, Jaemoo et al. (30 June 2018). "Non-exercise activity thermogenesis (NEAT): a component of total daily energy expenditure". Journal of Exercise Nutrition & Biochemistry 22 (2): 23–30. doi:10.20463/jenb.2018.0013. ISSN 2233-6834. PMID 30149423. 
  5. ↑ Fedewa, Michael V.; Hathaway, Elizabeth D.; Williams, Tyler D.; Schmidt, Michael D. (1 June 2017). "Effect of Exercise Training on Non-Exercise Physical Activity: A Systematic Review and Meta-Analysis of Randomized Controlled Trials" (in en). Sports Medicine 47 (6): 1171–1182. doi:10.1007/s40279-016-0649-z. ISSN 1179-2035. PMID 27873191. https://link.springer.com/article/10.1007/s40279-016-0649-z. 
  6. ↑ Washburn, R. A.; Lambourne, K.; Szabo, A. N.; Herrmann, S. D.; Honas, J. J.; Donnelly, J. E. (February 2014). "Does increased prescribed exercise alter non‐exercise physical activity/energy expenditure in healthy adults? A systematic review" (in en). Clinical Obesity 4 (1): 1–20. doi:10.1111/cob.12040. ISSN 1758-8103. PMID 25425128. 
  7. ↑ Mansfeldt, Julie Marvel; Magkos, Faidon (1 June 2023). "Compensatory Responses to Exercise Training As Barriers to Weight Loss: Changes in Energy Intake and Non-exercise Physical Activity" (in en). Current Nutrition Reports 12 (2): 327–337. doi:10.1007/s13668-023-00467-y. ISSN 2161-3311. PMID 36933180. https://link.springer.com/article/10.1007/s13668-023-00467-y. 
  8. ↑ Levine, James A. (1 August 2015). "Sick of sitting" (in en). Diabetologia 58 (8): 1751–1758. doi:10.1007/s00125-015-3624-6. ISSN 1432-0428. PMID 26003325. PMC 4519030. https://link.springer.com/article/10.1007/s00125-015-3624-6. 



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