Concurrent Heat and Intermittent Hypoxic Training: No Additional Performance Benefit Over Temperate Training.

McCleave, EL; Slattery, KM; Duffield, R; Crowcroft, S; Abbiss, CR; Wallace, LK; Coutts, AJ

Concurrent Heat and Intermittent Hypoxic Training: No Additional Performance Benefit Over Temperate Training.

McCleave, EL Slattery, KM Duffield, R

Crowcroft, S Abbiss, CR Wallace, LK Coutts, AJ

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Publisher:: HUMAN KINETICS PUBL INC
Publication Type:: Journal Article
Citation:: International journal of sports physiology and performance, 2020, 15, (9), pp. 1-12
Issue Date:: 2020-09-16

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Field	Value	Language
dc.contributor.author	McCleave, EL
dc.contributor.author	Slattery, KM
dc.contributor.author	Duffield, R https://orcid.org/0000-0002-5641-1314
dc.contributor.author	Crowcroft, S
dc.contributor.author	Abbiss, CR
dc.contributor.author	Wallace, LK
dc.contributor.author	Coutts, AJ
dc.date.accessioned	2021-02-25T00:28:44Z
dc.date.available	2019-12-16
dc.date.available	2021-02-25T00:28:44Z
dc.date.issued	2020-09-16
dc.identifier.citation	International journal of sports physiology and performance, 2020, 15, (9), pp. 1-12
dc.identifier.issn	1555-0265
dc.identifier.issn	1555-0273
dc.identifier.uri	http://hdl.handle.net/10453/146434
dc.description.abstract	<h4>Purpose</h4>To examine whether concurrent heat and intermittent hypoxic training can improve endurance performance and physiological responses relative to independent heat or temperate interval training.<h4>Methods</h4>Well-trained male cyclists (N = 29) completed 3 weeks of moderate- to high-intensity interval training (4 × 60 min·wk-1) in 1 of 3 conditions: (1) heat (HOT: 32°C, 50% relative humidity, 20.8% fraction of inspired oxygen, (2) heat + hypoxia (H+H: 32°C, 50% relative humidity, 16.2% fraction of inspired oxygen), or (3) temperate environment (CONT: 22°C, 50% relative humidity, 20.8% fraction of inspired oxygen). Performance 20-km time trials (TTs) were conducted in both temperate (TTtemperate) and assigned condition (TTenvironment) before (base), immediately after (mid), and after a 3-week taper (end). Measures of hemoglobin mass, plasma volume, and blood volume were also assessed.<h4>Results</h4>There was improved 20-km TT performance to a similar extent across all groups in both TTtemperate (mean ±90% confidence interval HOT, -2.8% ±1.8%; H+H, -2.0% ±1.5%; CONT, -2.0% ±1.8%) and TTenvironment (HOT, -3.3% ±1.7%; H+H, -3.1% ±1.6%; CONT, -3.2% ±1.1%). Plasma volume (HOT, 3.8% ±4.7%; H+H, 3.3% ±4.7%) and blood volume (HOT, 3.0% ±4.1%; H+H, 4.6% ±3.9%) were both increased at mid in HOT and H+H over CONT. Increased hemoglobin mass was observed in H+H only (3.0% ±1.8%).<h4>Conclusion</h4>Three weeks of interval training in heat, concurrent heat and hypoxia, or temperate environments improve 20-km TT performance to the same extent. Despite indications of physiological adaptations, the addition of independent heat or concurrent heat and hypoxia provided no greater performance benefits in a temperate environment than temperate training alone.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	HUMAN KINETICS PUBL INC
dc.relation.ispartof	International journal of sports physiology and performance
dc.relation.isbasedon	10.1123/ijspp.2019-0277
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	1106 Human Movement and Sports Sciences, 1116 Medical Physiology, 1701 Psychology
dc.subject.classification	Sport Sciences
dc.title	Concurrent Heat and Intermittent Hypoxic Training: No Additional Performance Benefit Over Temperate Training.
dc.type	Journal Article
utslib.citation.volume	15
utslib.location.activity	United States
utslib.for	1106 Human Movement and Sports Sciences
utslib.for	1116 Medical Physiology
utslib.for	1701 Psychology
pubs.organisational-group	/University of Technology Sydney/Faculty of Health
pubs.organisational-group	/University of Technology Sydney/Strength - CHSP - Health Services and Practice
pubs.organisational-group	/University of Technology Sydney/Strength - CHT - Health Technologies
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	recently_added	*
dc.date.updated	2021-02-25T00:28:43Z
pubs.issue	9
pubs.publication-status	Published
pubs.volume	15
utslib.citation.issue	9

Abstract:

Purpose

To examine whether concurrent heat and intermittent hypoxic training can improve endurance performance and physiological responses relative to independent heat or temperate interval training.

Methods

Well-trained male cyclists (N = 29) completed 3 weeks of moderate- to high-intensity interval training (4 × 60 min·wk-1) in 1 of 3 conditions: (1) heat (HOT: 32°C, 50% relative humidity, 20.8% fraction of inspired oxygen, (2) heat + hypoxia (H+H: 32°C, 50% relative humidity, 16.2% fraction of inspired oxygen), or (3) temperate environment (CONT: 22°C, 50% relative humidity, 20.8% fraction of inspired oxygen). Performance 20-km time trials (TTs) were conducted in both temperate (TTtemperate) and assigned condition (TTenvironment) before (base), immediately after (mid), and after a 3-week taper (end). Measures of hemoglobin mass, plasma volume, and blood volume were also assessed.

Results

There was improved 20-km TT performance to a similar extent across all groups in both TTtemperate (mean ±90% confidence interval HOT, -2.8% ±1.8%; H+H, -2.0% ±1.5%; CONT, -2.0% ±1.8%) and TTenvironment (HOT, -3.3% ±1.7%; H+H, -3.1% ±1.6%; CONT, -3.2% ±1.1%). Plasma volume (HOT, 3.8% ±4.7%; H+H, 3.3% ±4.7%) and blood volume (HOT, 3.0% ±4.1%; H+H, 4.6% ±3.9%) were both increased at mid in HOT and H+H over CONT. Increased hemoglobin mass was observed in H+H only (3.0% ±1.8%).

Conclusion

Three weeks of interval training in heat, concurrent heat and hypoxia, or temperate environments improve 20-km TT performance to the same extent. Despite indications of physiological adaptations, the addition of independent heat or concurrent heat and hypoxia provided no greater performance benefits in a temperate environment than temperate training alone.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/146434