Clinical trial NCT05727774: Effect of Water Biking in Hot Versus Neutral Water for Heat Acclimatation
Official title: Effect of Hot Versus Neutral Water for Heat Acclimatation and Sport Performance During a Water Biking Training Protocol : Controlled Randomised Study
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Healthy
Heat Exposure
Keywords: Water biking
Acclimatization
Lead sponsor: University Hospital, Montpellier
Sponsor class: OTHER
First posted: 2023-02-14
Enrollment: 24
Sex: ALL
Minimum age (years): 18
Maximum age (years): 60
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: The goal of this clinical trial is to compare the efficiency of water biking training in hot (35°C) versus neutral (25°C) temperature water to elicite heat acclimation in healthy recreative athletes.

Detailed description: The goal of this clinical trial is to compare the efficiency of water biking training in hot (35°C) versus neutral (25°C) temperature water to elicite heat acclimation in healthy recreative athletes. The main questions it aims to answer are:

* Does the water biking training protocol in hot versus neutral temperature water improve the time trial in an artificially hot and humid indoor environment?
* Does the water biking training protocol in hot versus neutral temperature water improve the VO2 max performance and force/velocity profile in neutral indoor environment?
* What are the main acclimation adaptations (central and cutaneous temperature), heart rate, cardiac function, sweating quality, sleep quality, haematologic profile.

Participants will have to do pre and post training tests in both normal environment (cardiorespiratory stress test, force/velocity profile test, echocardiography) and artificially hot and humid indoor environment (time trial). The training protocols consists in 10 sessions of 1 hour of water bike aerobic training (5 times a week for 2 weeks) at an intensity based on the heart rate corresponding to the 1st respiratory threshold, in hot (interventional group IG: 35°C) versus neutral (control group CG: 25°C) water.

Eligibility criteria: Inclusion Criteria:

* Healthy people
* Sports practicing

Exclusion Criteria:

* Acclimatation already done (recent training in hot and/or humid) less than 2 months
* Heart disease recent or non controlled
* Heat intolerance
* Water phobia or inable to swim

Primary outcomes:
measure: Change of the distance traveled (meter) on a Time Trial between pre and post training tests in hot and humid atmosphere (environmental room)
timeFrame: The 1st Time Trial will be performed the week preceding the program training. The 2nd Time Trial will be performed the week following the program training
Secondary outcomes:
measure: Change in VO2 Max (ml/kg/min) between pre and post training tests in normal environment
timeFrame: The 1st maximal cardiorespiratory test will be performed the week preceding the program training. The 2nd maximal cardiorespiratory test will be performed the week following the program training
measure: Change in Maximal Aerobic Power (Watts) between pre and post training tests in normal environment
timeFrame: The 1st maximal cardiorespiratory test will be performed the week preceding the program training. The 2nd maximal cardiorespiratory test will be performed the week following the program training
measure: Change of "global longitudinal strain of left ventricule" (%) measured during an echocardiography between pre and post training tests in normal environment
timeFrame: The 1st echocardiography will be performed the week preceding the program training. The 2nd echocardiography will be performed the week following the program training
measure: Change on central temperature (°C) between pre and post training test in hot and humid atmosphere (environmental room)
timeFrame: The 1st Time Trial will be performed the week preceding the program training. The 2nd Time Trial will be performed the week following the program training
measure: Change on cutaneours temperature (°C) between pre and post training test in hot and humid atmosphere (environmental room)
timeFrame: The 1st Time Trial will be performed the week preceding the program training. The 2nd Time Trial will be performed the week following the program training
measure: Change of Na concentration (mmol/L) in the sweat between pre and post training test in hot and humid atmosphere (environmental room)
timeFrame: The 1st Time Trial will be performed the week preceding the program training. The 2nd Time Trial will be performed the week following the program training
measure: Change of body weight loss (Kg) between pre and post training test in hot and humid atmosphere (environmental room)
timeFrame: The 1st measure of body weight will be performed the week preceding the program training. The 2nd measure of body weight will be performed the week following the program training
measure: Change of Sleep quality between the first and the last training session of water biking
timeFrame: The sleep self-questionnaire will be performed immediately after the first training session (Day 1) and immediately after the last training session (Day 10) of water biking
measure: Change of force/velocity power (N/m) between pre and post training test
timeFrame: The 1st measure of force/velocity power will be performed the week preceding the program training. The 2nd measure of force/velocity power will be performed the week following the program training
measure: Change of sytemic low grade inflammation (CRP = C-Reactive Protein, mg/l) between pre and post training test
timeFrame: The 1st measure of CRP will be performed the week preceding the program training. The 2nd measure of CRP will be performed the week following the program training
measure: Change of haematocrit (%) between pre and post training test
timeFrame: The 1st measure of haematocrit will be performed the week preceding the program training. The 2nd measure of haematocrit will be performed the week following the program training
measure: Change of hemoglobin level (g/100ml) between pre and post training test
timeFrame: The 1st measure of hemoglobin level will be performed the week preceding the program training. The 2nd measure of hemoglobin level will be performed the week following the program training
measure: Change of Rate of Perceived Effort (RPE) on a Time Trial between pre and post training tests
timeFrame: The 1st Time Trial will be performed the week preceding the program training. The 2nd Time Trial will be performed the week following the program training
Other outcomes:
Locations:
city: Montpellier
country: France
facility: Département de Médecine Physique et Réadaptation
Study officials:
References:
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citation: Zurawlew MJ, Mee JA, Walsh NP. Post-exercise Hot Water Immersion Elicits Heat Acclimation Adaptations in Endurance Trained and Recreationally Active Individuals. Front Physiol. 2018 Dec 18;9:1824. doi: 10.3389/fphys.2018.01824. eCollection 2018.
citation: Racinais S, Alonso JM, Coutts AJ, Flouris AD, Girard O, Gonzalez-Alonso J, Hausswirth C, Jay O, Lee JK, Mitchell N, Nassis GP, Nybo L, Pluim BM, Roelands B, Sawka MN, Wingo J, Periard JD. Consensus recommendations on training and competing in the heat. Br J Sports Med. 2015 Sep;49(18):1164-73. doi: 10.1136/bjsports-2015-094915. Epub 2015 Jun 11.
citation: Zurawlew MJ, Mee JA, Walsh NP. Post-exercise Hot Water Immersion Elicits Heat Acclimation Adaptations That Are Retained for at Least Two Weeks. Front Physiol. 2019 Aug 28;10:1080. doi: 10.3389/fphys.2019.01080. eCollection 2019.