Effects of normobaric hypoxia on upper body critical power and anaerobic working capacity

Michael B. La Monica; David H. Fukuda; Tristan M. Starling-Smith; Ran Wang; Jay R. Hoffman; Jeffrey R. Stout

doi:https://doi.org/10.1016/j.resp.2017.12.002

Effects of normobaric hypoxia on upper body critical power and anaerobic working capacity

Michael B. La Monica, David H. Fukuda, Tristan M. Starling-Smith, Ran Wang, Jay R. Hoffman, Jeffrey R. Stout

Research output: Contribution to journal › Article › peer-review

Abstract

Purpose To evaluate the effects of moderate normobaric hypoxia on the parameters of the work-time relationship in the upper body. Methods Twenty-one recreationally active men completed a graded exercise test in both normobaric hypoxia (H) and normoxia (N) to exhaustion on an arm ergometer to determine V̇O₂peak and peak power output (PPO). Each participant completed four constant work-rate (CWR) arm-cranking tests at 90–120% PPO in both environmental conditions. Linear regression was used to estimate critical power (CP) and anaerobic working capacity (AWC) via work-time relationship during the CWR tests. Results H significantly reduced V̇O₂peak (N: 2.34 ± 0.34 L vs. H: 2.27 ± 0.34 L, p = 0.041), PPO (N: 125.29 ± 17.98 W vs. H: 121.11 ± 17.98 W, p = 0.001), and CP (N: 90.22 ± 12.88 W vs. H: 85.26 ± 9.64 W, p = 0.042), but had no effect on AWC (N: 9.16 ± 2.81 kJ vs. H: 8.75 ± 3.23 kJ, p = 0.600). Discussion Moderate normobaric hypoxia appears to reduce CP in the upper body but has a variable effect on AWC.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Respiratory Physiology and Neurobiology
Volume	249
DOIs	https://doi.org/10.1016/j.resp.2017.12.002
State	Published - Feb 2018
Externally published	Yes

Keywords

Altitude
Environment
Fatigue
Metabolism
Work-time relationship

All Science Journal Classification (ASJC) codes

General Neuroscience
Physiology
Pulmonary and Respiratory Medicine

Access to Document

https://doi.org/10.1016/j.resp.2017.12.002

Cite this

@article{acb535d06d8e4f69b9602da187de9040,

title = "Effects of normobaric hypoxia on upper body critical power and anaerobic working capacity",

abstract = "Purpose To evaluate the effects of moderate normobaric hypoxia on the parameters of the work-time relationship in the upper body. Methods Twenty-one recreationally active men completed a graded exercise test in both normobaric hypoxia (H) and normoxia (N) to exhaustion on an arm ergometer to determine {\.V}O2peak and peak power output (PPO). Each participant completed four constant work-rate (CWR) arm-cranking tests at 90–120% PPO in both environmental conditions. Linear regression was used to estimate critical power (CP) and anaerobic working capacity (AWC) via work-time relationship during the CWR tests. Results H significantly reduced {\.V}O2peak (N: 2.34 ± 0.34 L vs. H: 2.27 ± 0.34 L, p = 0.041), PPO (N: 125.29 ± 17.98 W vs. H: 121.11 ± 17.98 W, p = 0.001), and CP (N: 90.22 ± 12.88 W vs. H: 85.26 ± 9.64 W, p = 0.042), but had no effect on AWC (N: 9.16 ± 2.81 kJ vs. H: 8.75 ± 3.23 kJ, p = 0.600). Discussion Moderate normobaric hypoxia appears to reduce CP in the upper body but has a variable effect on AWC.",

keywords = "Altitude, Environment, Fatigue, Metabolism, Work-time relationship",

author = "{La Monica}, {Michael B.} and Fukuda, {David H.} and Starling-Smith, {Tristan M.} and Ran Wang and Hoffman, {Jay R.} and Stout, {Jeffrey R.}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2018",

month = feb,

doi = "https://doi.org/10.1016/j.resp.2017.12.002",

language = "الإنجليزيّة",

volume = "249",

pages = "1--6",

journal = "Respiratory Physiology and Neurobiology",

issn = "1569-9048",

publisher = "Elsevier",

}

TY - JOUR

T1 - Effects of normobaric hypoxia on upper body critical power and anaerobic working capacity

AU - La Monica, Michael B.

AU - Fukuda, David H.

AU - Starling-Smith, Tristan M.

AU - Wang, Ran

AU - Hoffman, Jay R.

AU - Stout, Jeffrey R.

PY - 2018/2

Y1 - 2018/2

N2 - Purpose To evaluate the effects of moderate normobaric hypoxia on the parameters of the work-time relationship in the upper body. Methods Twenty-one recreationally active men completed a graded exercise test in both normobaric hypoxia (H) and normoxia (N) to exhaustion on an arm ergometer to determine V̇O2peak and peak power output (PPO). Each participant completed four constant work-rate (CWR) arm-cranking tests at 90–120% PPO in both environmental conditions. Linear regression was used to estimate critical power (CP) and anaerobic working capacity (AWC) via work-time relationship during the CWR tests. Results H significantly reduced V̇O2peak (N: 2.34 ± 0.34 L vs. H: 2.27 ± 0.34 L, p = 0.041), PPO (N: 125.29 ± 17.98 W vs. H: 121.11 ± 17.98 W, p = 0.001), and CP (N: 90.22 ± 12.88 W vs. H: 85.26 ± 9.64 W, p = 0.042), but had no effect on AWC (N: 9.16 ± 2.81 kJ vs. H: 8.75 ± 3.23 kJ, p = 0.600). Discussion Moderate normobaric hypoxia appears to reduce CP in the upper body but has a variable effect on AWC.

AB - Purpose To evaluate the effects of moderate normobaric hypoxia on the parameters of the work-time relationship in the upper body. Methods Twenty-one recreationally active men completed a graded exercise test in both normobaric hypoxia (H) and normoxia (N) to exhaustion on an arm ergometer to determine V̇O2peak and peak power output (PPO). Each participant completed four constant work-rate (CWR) arm-cranking tests at 90–120% PPO in both environmental conditions. Linear regression was used to estimate critical power (CP) and anaerobic working capacity (AWC) via work-time relationship during the CWR tests. Results H significantly reduced V̇O2peak (N: 2.34 ± 0.34 L vs. H: 2.27 ± 0.34 L, p = 0.041), PPO (N: 125.29 ± 17.98 W vs. H: 121.11 ± 17.98 W, p = 0.001), and CP (N: 90.22 ± 12.88 W vs. H: 85.26 ± 9.64 W, p = 0.042), but had no effect on AWC (N: 9.16 ± 2.81 kJ vs. H: 8.75 ± 3.23 kJ, p = 0.600). Discussion Moderate normobaric hypoxia appears to reduce CP in the upper body but has a variable effect on AWC.

KW - Altitude

KW - Environment

KW - Fatigue

KW - Metabolism

KW - Work-time relationship

UR - http://www.scopus.com/inward/record.url?scp=85038017972&partnerID=8YFLogxK

U2 - https://doi.org/10.1016/j.resp.2017.12.002

DO - https://doi.org/10.1016/j.resp.2017.12.002

M3 - مقالة

C2 - 29247712

SN - 1569-9048

VL - 249

SP - 1

EP - 6

JO - Respiratory Physiology and Neurobiology

JF - Respiratory Physiology and Neurobiology

ER -

Effects of normobaric hypoxia on upper body critical power and anaerobic working capacity

Abstract

Keywords

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this