دورية أكاديمية

أعرض في EDS

Physiological assessment of a 16 day, 4385 km ultra-endurance mountain bike race: A case study.

التفاصيل البيبلوغرافية
العنوان:	Physiological assessment of a 16 day, 4385 km ultra-endurance mountain bike race: A case study.
المؤلفون:	Hyldahl RD; Department of Exercise Sciences, Brigham Young University, Provo, Utah, USA., Gifford JR; Department of Exercise Sciences, Brigham Young University, Provo, Utah, USA., Davidson LE; Department of Exercise Sciences, Brigham Young University, Provo, Utah, USA., Hancock CR; Department of Nutrition, Dietetics & Food Science, Brigham Young University, Provo, Utah, USA., Hafen PS; Department of Exercise Sciences, Brigham Young University, Provo, Utah, USA., Parcell AC; Department of Exercise Sciences, Brigham Young University, Provo, Utah, USA., Mack GW; Department of Exercise Sciences, Brigham Young University, Provo, Utah, USA.
المصدر:	Experimental physiology [Exp Physiol] 2024 Feb; Vol. 109 (2), pp. 165-174. Date of Electronic Publication: 2024 Jan 08.
نوع المنشور:	Case Reports; Journal Article
اللغة:	English
بيانات الدورية:	Publisher: Wiley-Blackwell Country of Publication: England NLM ID: 9002940 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1469-445X (Electronic) Linking ISSN: 09580670 NLM ISO Abbreviation: Exp Physiol Subsets: MEDLINE
أسماء مطبوعة:	Publication: Cambridge, Eng : Wiley-Blackwell Original Publication: Cambridge ; New York, NY, USA : Published for the Physiological Society by Cambridge University Press, c1990-
مواضيع طبية MeSH:	Bicycling* , Physical Endurance*/physiology, Male ; Humans ; Middle Aged ; Exercise/physiology ; Energy Metabolism ; Muscle, Skeletal/physiology
مستخلص:	The Tour Divide (TD) is a 4385 km ultra-endurance bicycle race that follows the continental divide from Canada to Mexico. In this case study, we performed a comprehensive molecular and physiological profile before and after the completion of the TD. Assessments were performed 35 days before the start (Pre-TD) and ∼36 h after the finish (Post-TD). Total energy expenditure was assessed during the first 9 days by doubly labelled water ( ² H 2 ¹⁸ O), abdominal and leg tissue volumes via MRI, and graded exercise tests to quantify fitness and substrate preference. Vastus lateralis muscle biopsies were taken to measure mitochondrial function via respirometry, and vascular function was assessed using Doppler ultrasound. The 47-year-old male subject took 16 days 7 h 45 min to complete the route. He rode an average of 16.8 h/day. Neither maximal O 2 uptake nor maximal power output changed pre- to post-TD. Measurement of total energy expenditure and dietary recall records suggested maintenance of energy balance, which was supported by the lack of change in body weight. The subject lost both appendicular and trunk fat mass and gained leg lean mass pre- to post-TD. Skeletal muscle mitochondrial and vascular endothelial function decreased pre- to post-TD. Overall, exercise performance was maintained despite reductions in muscle mitochondrial and vascular endothelial function post-TD, suggesting a metabolic reserve in our highly trained athlete. (© 2024 The Authors. Experimental Physiology published by John Wiley & Sons Ltd on behalf of The Physiological Society.)
References:	J Appl Physiol (1985). 2018 Nov 1;125(5):1447-1455. (PMID: 30024339) Int J Sports Physiol Perform. 2017 Aug;12(7):984-989. (PMID: 27967268) J Appl Physiol (1985). 2019 Jul 1;127(1):47-57. (PMID: 31046520) J Appl Physiol (1985). 2013 Dec;115(11):1589-98. (PMID: 24030665) Int J Sports Med. 2003 Nov;24(8):603-8. (PMID: 14598198) J Appl Physiol (1985). 2015 Jun 15;118(12):1502-9. (PMID: 25150223) J Physiol. 2008 Oct 15;586(20):5003-12. (PMID: 18755749) J Sports Sci Med. 2012 Dec 01;11(4):719-26. (PMID: 24150084) Int J Genomics. 2018 Sep 4;2018:5121540. (PMID: 30255029) Med Sci Sports Exerc. 2018 Dec;50(12):2409-2417. (PMID: 30102675) J Appl Physiol (1985). 2017 Dec 1;123(6):1708-1720. (PMID: 28883048) Proc Natl Acad Sci U S A. 2017 Jun 13;114(24):6382-6387. (PMID: 28533386) Eur J Appl Physiol Occup Physiol. 1997;76(3):243-52. (PMID: 9286604) Exp Physiol. 2024 Feb;109(2):165-174. (PMID: 38189630) J Appl Physiol (1985). 2017 Dec 1;123(6):1516-1524. (PMID: 28883046) Wilderness Environ Med. 2018 Dec;29(4):508-520. (PMID: 30249353) Am J Physiol. 1992 Nov;263(5 Pt 1):E965-73. (PMID: 1443129) Int J Biochem Cell Biol. 2009 Oct;41(10):1837-45. (PMID: 19467914) Wilderness Environ Med. 2017 Mar;28(1):10-16. (PMID: 28257712) J Appl Physiol (1985). 2004 Aug;97(2):749-55; discussion 748. (PMID: 15090480) Med Sci Sports Exerc. 2019 Mar;51(3):568-574. (PMID: 30363009) J Appl Physiol Respir Environ Exerc Physiol. 1983 Aug;55(2):628-34. (PMID: 6618956) J Sports Med Phys Fitness. 2019 May;59(5):791-797. (PMID: 30293407) J Physiol. 2014 Jun 15;592(12):2625-35. (PMID: 24687582) Med Sci Sports Exerc. 2017 Feb;49(2):357-362. (PMID: 27669446)
فهرسة مساهمة:	Keywords: endurance exercise; marathon; mitochondria; skeletal muscle; ultra-endurance; vascular function
تواريخ الأحداث:	Date Created: 20240108 Date Completed: 20240202 Latest Revision: 20240410
رمز التحديث:	20240410
مُعرف محوري في PubMed:	PMC10988653
DOI:	10.1113/EP091260
PMID:	38189630
قاعدة البيانات:	MEDLINE

View record at Wiley

Find this article in full text from ProQuest

Full Text Finder

الوصف
تدمد:	1469-445X
DOI:	10.1113/EP091260