Effect of Water Biking in Hot Versus Neutral Water for Heat Acclimatation (THERMIDOR)

University Hospital Center (CHU)

Status: Completed

Conditions: Heat Exposure; Healthy

Treatments: Other: Water Biking in neutral water condition; Other: Water Biking in hot water condition

Study type: Interventional

Funder types: Other

Identifiers

NCT05727774

RECHMPL22_0076

Details and patient eligibility

About

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.

Full 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.

Enrollment: 24 patients

Sex: All

Ages: 18 to 60 years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

---

24 participants in 2 patient groups

Hot water condition

Experimental group

Description:

Participants do the water biking training for two weeks, 1 hour a day, in hot water temperature (35°C)

Treatment:

Other: Water Biking in hot water condition

Neutral water condition

Sham Comparator group

Description:

Participants do the water biking training for two weeks, 1 hour a day, in neutral water temperature (25°C)

Treatment:

Other: Water Biking in neutral water condition