The effect of age on pulmonary and muscle oxygenation kinetics following high-intensity interval training

Nattai R. Borges, Peter R J Reaburn, Thomas M Doering, Christos Argus, Matthew Driller

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Introduction Physiological measures of pulmonary and muscle oxygenation follow an exponential trends following exercise until reaching baseline values. A steeper exponential trend suggests faster post-exercise recovery. To date, no study has investigated the effect of age on off-transient pulmonary and muscle oxygenation kinetics following a high-intensity interval training bout (HIIT) typical of training undertaken by both competitive endurance and sprint cyclists. Therefore, this study examined the effect of age on the off-transient pulmonary and muscle oxygenation kinetics in well-trained masters and young cyclists following HIIT. Methods Pulmonary (VO2) and muscle oxygenation (Total Oxygenation Index [TOI] and change in deoxyhemoglobin concentration (∆[HHb])) were monitored continuously in well-trained masters (n = 9, age: 55.6 ± 5.0 yr) and young (n = 8, age: 25.9 ± 3.0 yr) cyclists during HIIT and recovery. The HIIT consisted of 6 x 30 second intervals at 175% maximal aerobic power with 4.5 minutes rest between intervals. Following HIIT, 20 minutes of passive supine rest was undertaken. The off-transient responses of VO2, TOI and ∆[HHb] from the cessation of the HIIT were then modelled using a mono-exponential function. Results The time constant (τ) of the VO2 response (τVO2) was significantly longer in the masters (mean ± SD; 217.49 ± 44.43 s) compared to young (169.69 ± 35.73 s) cyclists (P = 0.029). The amplitude of the VO2 response was also lower in masters (d = 0.69, moderate), although not significant (P = 0.18). A trend for a slowed τTOI was found in the masters cyclists, however this was not found to be significant (P = 0.40, d = 0.42, small). Significant correlations were observed between τTOI, and both τVO2 (r= 0.49, P = 0.049) and τ[HHb] (r = 0.75, P < 0.001), and a non-significant moderate relationship was found between age and τVO2 (r = 0.48, P = 0.05). Discussion The significantly slowed τVO2 suggests that masters athletes exhibit longer time for metabolic recovery following HIIT. Additionally, although no significant age-related differences for muscle re-oxygenation kinetics where observed a trend for a slower τTOI during the recovery phase was found. The slowed pulmonary and muscle oxygenation kinetics may have a negative effect on repeat sprint performance in masters athletes and greater recovery periods between exercise bouts may be necessary to maintain power output.
Original languageEnglish
Pages (from-to)73-77
JournalJapanese Journal of Physical Fitness and Sports Medicine
DOIs
Publication statusPublished - 2017
Externally publishedYes

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Muscles
Lung
Athletes
High-Intensity Interval Training
Exercise

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@article{655a0da9a6f54ccf900e63d0cc11884e,
title = "The effect of age on pulmonary and muscle oxygenation kinetics following high-intensity interval training",
abstract = "Introduction Physiological measures of pulmonary and muscle oxygenation follow an exponential trends following exercise until reaching baseline values. A steeper exponential trend suggests faster post-exercise recovery. To date, no study has investigated the effect of age on off-transient pulmonary and muscle oxygenation kinetics following a high-intensity interval training bout (HIIT) typical of training undertaken by both competitive endurance and sprint cyclists. Therefore, this study examined the effect of age on the off-transient pulmonary and muscle oxygenation kinetics in well-trained masters and young cyclists following HIIT. Methods Pulmonary (VO2) and muscle oxygenation (Total Oxygenation Index [TOI] and change in deoxyhemoglobin concentration (∆[HHb])) were monitored continuously in well-trained masters (n = 9, age: 55.6 ± 5.0 yr) and young (n = 8, age: 25.9 ± 3.0 yr) cyclists during HIIT and recovery. The HIIT consisted of 6 x 30 second intervals at 175{\%} maximal aerobic power with 4.5 minutes rest between intervals. Following HIIT, 20 minutes of passive supine rest was undertaken. The off-transient responses of VO2, TOI and ∆[HHb] from the cessation of the HIIT were then modelled using a mono-exponential function. Results The time constant (τ) of the VO2 response (τVO2) was significantly longer in the masters (mean ± SD; 217.49 ± 44.43 s) compared to young (169.69 ± 35.73 s) cyclists (P = 0.029). The amplitude of the VO2 response was also lower in masters (d = 0.69, moderate), although not significant (P = 0.18). A trend for a slowed τTOI was found in the masters cyclists, however this was not found to be significant (P = 0.40, d = 0.42, small). Significant correlations were observed between τTOI, and both τVO2 (r= 0.49, P = 0.049) and τ[HHb] (r = 0.75, P < 0.001), and a non-significant moderate relationship was found between age and τVO2 (r = 0.48, P = 0.05). Discussion The significantly slowed τVO2 suggests that masters athletes exhibit longer time for metabolic recovery following HIIT. Additionally, although no significant age-related differences for muscle re-oxygenation kinetics where observed a trend for a slower τTOI during the recovery phase was found. The slowed pulmonary and muscle oxygenation kinetics may have a negative effect on repeat sprint performance in masters athletes and greater recovery periods between exercise bouts may be necessary to maintain power output.",
author = "Borges, {Nattai R.} and Reaburn, {Peter R J} and Doering, {Thomas M} and Christos Argus and Matthew Driller",
year = "2017",
doi = "10.7600/jspfsm.66.73",
language = "English",
pages = "73--77",
journal = "Japanese Journal of Physical Fitness and Sports Medicine",
issn = "0039-906X",
publisher = "Japanese Society of Physical Fitness and Sports Medicine",

}

The effect of age on pulmonary and muscle oxygenation kinetics following high-intensity interval training. / Borges, Nattai R.; Reaburn, Peter R J; Doering, Thomas M; Argus, Christos; Driller, Matthew.

In: Japanese Journal of Physical Fitness and Sports Medicine, 2017, p. 73-77.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - The effect of age on pulmonary and muscle oxygenation kinetics following high-intensity interval training

AU - Borges, Nattai R.

AU - Reaburn, Peter R J

AU - Doering, Thomas M

AU - Argus, Christos

AU - Driller, Matthew

PY - 2017

Y1 - 2017

N2 - Introduction Physiological measures of pulmonary and muscle oxygenation follow an exponential trends following exercise until reaching baseline values. A steeper exponential trend suggests faster post-exercise recovery. To date, no study has investigated the effect of age on off-transient pulmonary and muscle oxygenation kinetics following a high-intensity interval training bout (HIIT) typical of training undertaken by both competitive endurance and sprint cyclists. Therefore, this study examined the effect of age on the off-transient pulmonary and muscle oxygenation kinetics in well-trained masters and young cyclists following HIIT. Methods Pulmonary (VO2) and muscle oxygenation (Total Oxygenation Index [TOI] and change in deoxyhemoglobin concentration (∆[HHb])) were monitored continuously in well-trained masters (n = 9, age: 55.6 ± 5.0 yr) and young (n = 8, age: 25.9 ± 3.0 yr) cyclists during HIIT and recovery. The HIIT consisted of 6 x 30 second intervals at 175% maximal aerobic power with 4.5 minutes rest between intervals. Following HIIT, 20 minutes of passive supine rest was undertaken. The off-transient responses of VO2, TOI and ∆[HHb] from the cessation of the HIIT were then modelled using a mono-exponential function. Results The time constant (τ) of the VO2 response (τVO2) was significantly longer in the masters (mean ± SD; 217.49 ± 44.43 s) compared to young (169.69 ± 35.73 s) cyclists (P = 0.029). The amplitude of the VO2 response was also lower in masters (d = 0.69, moderate), although not significant (P = 0.18). A trend for a slowed τTOI was found in the masters cyclists, however this was not found to be significant (P = 0.40, d = 0.42, small). Significant correlations were observed between τTOI, and both τVO2 (r= 0.49, P = 0.049) and τ[HHb] (r = 0.75, P < 0.001), and a non-significant moderate relationship was found between age and τVO2 (r = 0.48, P = 0.05). Discussion The significantly slowed τVO2 suggests that masters athletes exhibit longer time for metabolic recovery following HIIT. Additionally, although no significant age-related differences for muscle re-oxygenation kinetics where observed a trend for a slower τTOI during the recovery phase was found. The slowed pulmonary and muscle oxygenation kinetics may have a negative effect on repeat sprint performance in masters athletes and greater recovery periods between exercise bouts may be necessary to maintain power output.

AB - Introduction Physiological measures of pulmonary and muscle oxygenation follow an exponential trends following exercise until reaching baseline values. A steeper exponential trend suggests faster post-exercise recovery. To date, no study has investigated the effect of age on off-transient pulmonary and muscle oxygenation kinetics following a high-intensity interval training bout (HIIT) typical of training undertaken by both competitive endurance and sprint cyclists. Therefore, this study examined the effect of age on the off-transient pulmonary and muscle oxygenation kinetics in well-trained masters and young cyclists following HIIT. Methods Pulmonary (VO2) and muscle oxygenation (Total Oxygenation Index [TOI] and change in deoxyhemoglobin concentration (∆[HHb])) were monitored continuously in well-trained masters (n = 9, age: 55.6 ± 5.0 yr) and young (n = 8, age: 25.9 ± 3.0 yr) cyclists during HIIT and recovery. The HIIT consisted of 6 x 30 second intervals at 175% maximal aerobic power with 4.5 minutes rest between intervals. Following HIIT, 20 minutes of passive supine rest was undertaken. The off-transient responses of VO2, TOI and ∆[HHb] from the cessation of the HIIT were then modelled using a mono-exponential function. Results The time constant (τ) of the VO2 response (τVO2) was significantly longer in the masters (mean ± SD; 217.49 ± 44.43 s) compared to young (169.69 ± 35.73 s) cyclists (P = 0.029). The amplitude of the VO2 response was also lower in masters (d = 0.69, moderate), although not significant (P = 0.18). A trend for a slowed τTOI was found in the masters cyclists, however this was not found to be significant (P = 0.40, d = 0.42, small). Significant correlations were observed between τTOI, and both τVO2 (r= 0.49, P = 0.049) and τ[HHb] (r = 0.75, P < 0.001), and a non-significant moderate relationship was found between age and τVO2 (r = 0.48, P = 0.05). Discussion The significantly slowed τVO2 suggests that masters athletes exhibit longer time for metabolic recovery following HIIT. Additionally, although no significant age-related differences for muscle re-oxygenation kinetics where observed a trend for a slower τTOI during the recovery phase was found. The slowed pulmonary and muscle oxygenation kinetics may have a negative effect on repeat sprint performance in masters athletes and greater recovery periods between exercise bouts may be necessary to maintain power output.

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