Validation of an ingestible temperature data logging and telemetry system during exercise in the heat

Gavin J S Travers, David S Nichols, Abdulaziz Farooq, Sébastien Racinais, Julien D Périard

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Aim: Intestinal temperature telemetry systems are promising monitoring and research tools in athletes. However, the additional equipment that must be carried to continuously record temperature data limits their use to training. The purpose of this study was to assess the validity and reliability of a new gastrointestinal temperature data logging and telemetry system (e-Celsius™) during water bath experimentation and exercise trials. Materials and Methods: Temperature readings of 23 pairs of e-Celsius (T eC) and VitalSense (T VS) ingestible capsules were compared to rectal thermistor responses (T rec) at 35, 38.5 and 42°C in a water bath. Devices were also assessed in vivo during steady-state cycling (n = 11) and intermittent running (n = 11) in hot conditions. Results: The water bath experiment showed T VS and T eC under-reported T rec (P<0.001). This underestimation of T rec also occurred during both cycling (mean bias vs T VS: 0.21°C, ICC: 0.84, 95% CI: 0.66–0.91; mean bias vs. T eC: 0.44°C, ICC: 0.68, 95% CI: 0.07–0.86, P<0.05) and running trials (mean bias vs. T VS: 0.15°C, ICC: 0.92, 95% CI: 0.83–0.96; mean bias vs. T eC: 0.25, ICC: 0.86, 95% CI: 0.61–0.94, P<0.05). However, calibrating the devices attenuated this difference during cycling and eliminated it during running. During recovery following cycling exercise, T eC and T VS were significantly lower than T rec despite calibration (P<0.01). Conclusion: These results indicate that both T eC and T VS under-report T rec during steady-state and intermittent exercise in the heat, with T eC predicting T rec with the least accuracy of the telemetry devices. It is therefore recommended to calibrate these devices at multiple temperatures prior to use.

Original languageEnglish
Pages (from-to)208-219
Number of pages12
JournalTemperature (Austin, Tex.)
Volume3
Issue number2
DOIs
Publication statusPublished - 2 Apr 2016
Externally publishedYes

Fingerprint

Telemetry
Hot Temperature
Exercise
Equipment and Supplies
Temperature
Baths
Running
Water
Reproducibility of Results
Athletes
Calibration
Capsules
Reading
Research

Cite this

Travers, Gavin J S ; Nichols, David S ; Farooq, Abdulaziz ; Racinais, Sébastien ; Périard, Julien D. / Validation of an ingestible temperature data logging and telemetry system during exercise in the heat. In: Temperature (Austin, Tex.). 2016 ; Vol. 3, No. 2. pp. 208-219.
@article{d2d5e05b6b124243b7a39eeab78d822b,
title = "Validation of an ingestible temperature data logging and telemetry system during exercise in the heat",
abstract = "Aim: Intestinal temperature telemetry systems are promising monitoring and research tools in athletes. However, the additional equipment that must be carried to continuously record temperature data limits their use to training. The purpose of this study was to assess the validity and reliability of a new gastrointestinal temperature data logging and telemetry system (e-Celsius™) during water bath experimentation and exercise trials. Materials and Methods: Temperature readings of 23 pairs of e-Celsius (T eC) and VitalSense (T VS) ingestible capsules were compared to rectal thermistor responses (T rec) at 35, 38.5 and 42°C in a water bath. Devices were also assessed in vivo during steady-state cycling (n = 11) and intermittent running (n = 11) in hot conditions. Results: The water bath experiment showed T VS and T eC under-reported T rec (P<0.001). This underestimation of T rec also occurred during both cycling (mean bias vs T VS: 0.21°C, ICC: 0.84, 95{\%} CI: 0.66–0.91; mean bias vs. T eC: 0.44°C, ICC: 0.68, 95{\%} CI: 0.07–0.86, P<0.05) and running trials (mean bias vs. T VS: 0.15°C, ICC: 0.92, 95{\%} CI: 0.83–0.96; mean bias vs. T eC: 0.25, ICC: 0.86, 95{\%} CI: 0.61–0.94, P<0.05). However, calibrating the devices attenuated this difference during cycling and eliminated it during running. During recovery following cycling exercise, T eC and T VS were significantly lower than T rec despite calibration (P<0.01). Conclusion: These results indicate that both T eC and T VS under-report T rec during steady-state and intermittent exercise in the heat, with T eC predicting T rec with the least accuracy of the telemetry devices. It is therefore recommended to calibrate these devices at multiple temperatures prior to use.",
keywords = "Journal Article, core temperature, intestinal temperature, pill temperature, thermal strain, calibration",
author = "Travers, {Gavin J S} and Nichols, {David S} and Abdulaziz Farooq and S{\'e}bastien Racinais and P{\'e}riard, {Julien D}",
year = "2016",
month = "4",
day = "2",
doi = "10.1080/23328940.2016.1171281",
language = "English",
volume = "3",
pages = "208--219",
journal = "Temperature (Austin, Tex.)",
issn = "2332-8940",
number = "2",

}

Validation of an ingestible temperature data logging and telemetry system during exercise in the heat. / Travers, Gavin J S; Nichols, David S; Farooq, Abdulaziz; Racinais, Sébastien; Périard, Julien D.

In: Temperature (Austin, Tex.), Vol. 3, No. 2, 02.04.2016, p. 208-219.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Validation of an ingestible temperature data logging and telemetry system during exercise in the heat

AU - Travers, Gavin J S

AU - Nichols, David S

AU - Farooq, Abdulaziz

AU - Racinais, Sébastien

AU - Périard, Julien D

PY - 2016/4/2

Y1 - 2016/4/2

N2 - Aim: Intestinal temperature telemetry systems are promising monitoring and research tools in athletes. However, the additional equipment that must be carried to continuously record temperature data limits their use to training. The purpose of this study was to assess the validity and reliability of a new gastrointestinal temperature data logging and telemetry system (e-Celsius™) during water bath experimentation and exercise trials. Materials and Methods: Temperature readings of 23 pairs of e-Celsius (T eC) and VitalSense (T VS) ingestible capsules were compared to rectal thermistor responses (T rec) at 35, 38.5 and 42°C in a water bath. Devices were also assessed in vivo during steady-state cycling (n = 11) and intermittent running (n = 11) in hot conditions. Results: The water bath experiment showed T VS and T eC under-reported T rec (P<0.001). This underestimation of T rec also occurred during both cycling (mean bias vs T VS: 0.21°C, ICC: 0.84, 95% CI: 0.66–0.91; mean bias vs. T eC: 0.44°C, ICC: 0.68, 95% CI: 0.07–0.86, P<0.05) and running trials (mean bias vs. T VS: 0.15°C, ICC: 0.92, 95% CI: 0.83–0.96; mean bias vs. T eC: 0.25, ICC: 0.86, 95% CI: 0.61–0.94, P<0.05). However, calibrating the devices attenuated this difference during cycling and eliminated it during running. During recovery following cycling exercise, T eC and T VS were significantly lower than T rec despite calibration (P<0.01). Conclusion: These results indicate that both T eC and T VS under-report T rec during steady-state and intermittent exercise in the heat, with T eC predicting T rec with the least accuracy of the telemetry devices. It is therefore recommended to calibrate these devices at multiple temperatures prior to use.

AB - Aim: Intestinal temperature telemetry systems are promising monitoring and research tools in athletes. However, the additional equipment that must be carried to continuously record temperature data limits their use to training. The purpose of this study was to assess the validity and reliability of a new gastrointestinal temperature data logging and telemetry system (e-Celsius™) during water bath experimentation and exercise trials. Materials and Methods: Temperature readings of 23 pairs of e-Celsius (T eC) and VitalSense (T VS) ingestible capsules were compared to rectal thermistor responses (T rec) at 35, 38.5 and 42°C in a water bath. Devices were also assessed in vivo during steady-state cycling (n = 11) and intermittent running (n = 11) in hot conditions. Results: The water bath experiment showed T VS and T eC under-reported T rec (P<0.001). This underestimation of T rec also occurred during both cycling (mean bias vs T VS: 0.21°C, ICC: 0.84, 95% CI: 0.66–0.91; mean bias vs. T eC: 0.44°C, ICC: 0.68, 95% CI: 0.07–0.86, P<0.05) and running trials (mean bias vs. T VS: 0.15°C, ICC: 0.92, 95% CI: 0.83–0.96; mean bias vs. T eC: 0.25, ICC: 0.86, 95% CI: 0.61–0.94, P<0.05). However, calibrating the devices attenuated this difference during cycling and eliminated it during running. During recovery following cycling exercise, T eC and T VS were significantly lower than T rec despite calibration (P<0.01). Conclusion: These results indicate that both T eC and T VS under-report T rec during steady-state and intermittent exercise in the heat, with T eC predicting T rec with the least accuracy of the telemetry devices. It is therefore recommended to calibrate these devices at multiple temperatures prior to use.

KW - Journal Article

KW - core temperature

KW - intestinal temperature

KW - pill temperature

KW - thermal strain

KW - calibration

UR - http://www.scopus.com/inward/record.url?scp=85018755559&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/validation-ingestible-temperature-data-logging-telemetry-system-during-exercise-heat

U2 - 10.1080/23328940.2016.1171281

DO - 10.1080/23328940.2016.1171281

M3 - Article

VL - 3

SP - 208

EP - 219

JO - Temperature (Austin, Tex.)

JF - Temperature (Austin, Tex.)

SN - 2332-8940

IS - 2

ER -