Ventilatory acclimatisation is beneficial for high-intensity exercise at altitude in elite cyclists

Nathan E. Townsend, Christopher Gore, Tammie Ebert, David Martin, Allan HAHN, Chin-Moi Chow

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Aim: The aim of this study was to examine the relationship between ventilatory adaptation and performance during altitude training at 2700 m. Methods: Seven elite cyclists (age: 21.2 ± 1.1 yr, body mass: 69.9 ± 5.6 kg, height 176.3 ± 4.9 cm) participated in this study. A hypoxic ventilatory response (HVR) test and a submaximal exercise test were performed at sea level prior to the training camp and again after 15 d at altitude (ALT15). Ventilation (V E), end-tidal carbon-dioxide partial pressure (P ETCO 2) and oxyhaemoglobin saturation via pulse oximetry (SpO 2) were measured at rest and during submaximal cycling at 250 W. A hill climb (HC) performance test was conducted at sea level and after 14 d at altitude (ALT14) using a road of similar length (5.5–6 km) and gradient (4.8–5.3%). Power output was measured using SRM cranks. Average HC power at ALT14 was normalised to sea level power (HC%). Multiple regression was used to identify significant predictors of performance at altitude. Results: At ALT15, there was a significant increase in resting V E (10.3 ± 1.9 vs. 12.2 ± 2.4 L·min −1) and HVR (0.34 ± 0.24 vs. 0.71 ± 0.49 L·min −1·% −1), while P ETCO 2 (38.4 ± 2.3 vs. 32.1 ± 3.3 mmHg) and SpO 2 (97.9 ± 0.7 vs. 94.0 ± 1.7%) were reduced (P <.05). Multiple regression revealed ΔHVR and exercise V E at altitude as significant predictors of HC% (adjusted r 2 = 0.913; P = 0.003). Conclusions: Ventilatory acclimatisation occurred during a 2 wk altitude training camp in elite cyclists and a higher HVR was associated with better performance at altitude, relative to sea level. These results suggest that ventilatory acclimatisation is beneficial for cycling performance at altitude.

Original languageEnglish
Pages (from-to)895-902
Number of pages8
JournalEuropean Journal of Sport Science
Volume16
Issue number8
DOIs
Publication statusPublished - 16 Nov 2016
Externally publishedYes

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Acclimatization
Oceans and Seas
Oxyhemoglobins
Oximetry
Partial Pressure
Exercise Test
Carbon Dioxide
Ventilation

Cite this

Townsend, Nathan E. ; Gore, Christopher ; Ebert, Tammie ; Martin, David ; HAHN, Allan ; Chow, Chin-Moi. / Ventilatory acclimatisation is beneficial for high-intensity exercise at altitude in elite cyclists. In: European Journal of Sport Science. 2016 ; Vol. 16, No. 8. pp. 895-902.
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title = "Ventilatory acclimatisation is beneficial for high-intensity exercise at altitude in elite cyclists",
abstract = "Aim: The aim of this study was to examine the relationship between ventilatory adaptation and performance during altitude training at 2700 m. Methods: Seven elite cyclists (age: 21.2 ± 1.1 yr, body mass: 69.9 ± 5.6 kg, height 176.3 ± 4.9 cm) participated in this study. A hypoxic ventilatory response (HVR) test and a submaximal exercise test were performed at sea level prior to the training camp and again after 15 d at altitude (ALT15). Ventilation (V E), end-tidal carbon-dioxide partial pressure (P ETCO 2) and oxyhaemoglobin saturation via pulse oximetry (SpO 2) were measured at rest and during submaximal cycling at 250 W. A hill climb (HC) performance test was conducted at sea level and after 14 d at altitude (ALT14) using a road of similar length (5.5–6 km) and gradient (4.8–5.3{\%}). Power output was measured using SRM cranks. Average HC power at ALT14 was normalised to sea level power (HC{\%}). Multiple regression was used to identify significant predictors of performance at altitude. Results: At ALT15, there was a significant increase in resting V E (10.3 ± 1.9 vs. 12.2 ± 2.4 L·min −1) and HVR (0.34 ± 0.24 vs. 0.71 ± 0.49 L·min −1·{\%} −1), while P ETCO 2 (38.4 ± 2.3 vs. 32.1 ± 3.3 mmHg) and SpO 2 (97.9 ± 0.7 vs. 94.0 ± 1.7{\%}) were reduced (P <.05). Multiple regression revealed ΔHVR and exercise V E at altitude as significant predictors of HC{\%} (adjusted r 2 = 0.913; P = 0.003). Conclusions: Ventilatory acclimatisation occurred during a 2 wk altitude training camp in elite cyclists and a higher HVR was associated with better performance at altitude, relative to sea level. These results suggest that ventilatory acclimatisation is beneficial for cycling performance at altitude.",
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Ventilatory acclimatisation is beneficial for high-intensity exercise at altitude in elite cyclists. / Townsend, Nathan E.; Gore, Christopher; Ebert, Tammie; Martin, David; HAHN, Allan; Chow, Chin-Moi.

In: European Journal of Sport Science, Vol. 16, No. 8, 16.11.2016, p. 895-902.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ventilatory acclimatisation is beneficial for high-intensity exercise at altitude in elite cyclists

AU - Townsend, Nathan E.

AU - Gore, Christopher

AU - Ebert, Tammie

AU - Martin, David

AU - HAHN, Allan

AU - Chow, Chin-Moi

PY - 2016/11/16

Y1 - 2016/11/16

N2 - Aim: The aim of this study was to examine the relationship between ventilatory adaptation and performance during altitude training at 2700 m. Methods: Seven elite cyclists (age: 21.2 ± 1.1 yr, body mass: 69.9 ± 5.6 kg, height 176.3 ± 4.9 cm) participated in this study. A hypoxic ventilatory response (HVR) test and a submaximal exercise test were performed at sea level prior to the training camp and again after 15 d at altitude (ALT15). Ventilation (V E), end-tidal carbon-dioxide partial pressure (P ETCO 2) and oxyhaemoglobin saturation via pulse oximetry (SpO 2) were measured at rest and during submaximal cycling at 250 W. A hill climb (HC) performance test was conducted at sea level and after 14 d at altitude (ALT14) using a road of similar length (5.5–6 km) and gradient (4.8–5.3%). Power output was measured using SRM cranks. Average HC power at ALT14 was normalised to sea level power (HC%). Multiple regression was used to identify significant predictors of performance at altitude. Results: At ALT15, there was a significant increase in resting V E (10.3 ± 1.9 vs. 12.2 ± 2.4 L·min −1) and HVR (0.34 ± 0.24 vs. 0.71 ± 0.49 L·min −1·% −1), while P ETCO 2 (38.4 ± 2.3 vs. 32.1 ± 3.3 mmHg) and SpO 2 (97.9 ± 0.7 vs. 94.0 ± 1.7%) were reduced (P <.05). Multiple regression revealed ΔHVR and exercise V E at altitude as significant predictors of HC% (adjusted r 2 = 0.913; P = 0.003). Conclusions: Ventilatory acclimatisation occurred during a 2 wk altitude training camp in elite cyclists and a higher HVR was associated with better performance at altitude, relative to sea level. These results suggest that ventilatory acclimatisation is beneficial for cycling performance at altitude.

AB - Aim: The aim of this study was to examine the relationship between ventilatory adaptation and performance during altitude training at 2700 m. Methods: Seven elite cyclists (age: 21.2 ± 1.1 yr, body mass: 69.9 ± 5.6 kg, height 176.3 ± 4.9 cm) participated in this study. A hypoxic ventilatory response (HVR) test and a submaximal exercise test were performed at sea level prior to the training camp and again after 15 d at altitude (ALT15). Ventilation (V E), end-tidal carbon-dioxide partial pressure (P ETCO 2) and oxyhaemoglobin saturation via pulse oximetry (SpO 2) were measured at rest and during submaximal cycling at 250 W. A hill climb (HC) performance test was conducted at sea level and after 14 d at altitude (ALT14) using a road of similar length (5.5–6 km) and gradient (4.8–5.3%). Power output was measured using SRM cranks. Average HC power at ALT14 was normalised to sea level power (HC%). Multiple regression was used to identify significant predictors of performance at altitude. Results: At ALT15, there was a significant increase in resting V E (10.3 ± 1.9 vs. 12.2 ± 2.4 L·min −1) and HVR (0.34 ± 0.24 vs. 0.71 ± 0.49 L·min −1·% −1), while P ETCO 2 (38.4 ± 2.3 vs. 32.1 ± 3.3 mmHg) and SpO 2 (97.9 ± 0.7 vs. 94.0 ± 1.7%) were reduced (P <.05). Multiple regression revealed ΔHVR and exercise V E at altitude as significant predictors of HC% (adjusted r 2 = 0.913; P = 0.003). Conclusions: Ventilatory acclimatisation occurred during a 2 wk altitude training camp in elite cyclists and a higher HVR was associated with better performance at altitude, relative to sea level. These results suggest that ventilatory acclimatisation is beneficial for cycling performance at altitude.

KW - Hypoxia

KW - respiratory

KW - endurance

KW - exercise

KW - performance

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JF - European Journal of Sport Science

SN - 1536-7290

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