Effects of Hot Baths Prior or After a Damaging Protocol on Muscle Function and HSP70 Expression
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Immersion, NIRS, isokinetic dynamometer, pressure algometer.
- Who it may be relevant to
- Registry conditions: Recovery, Mechanical Stress, Heat Stress, HSP70. Basic parameters: 19 years — 25 years · Male.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- France
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Overview
Muscle lengthening contractions lead to physiological responses such as strength loss, soreness, immune cell infiltration, and CK production, along with elevated heat shock proteins (HSPs), which protect and regenerate cells. Passive heating before or after exercise can aid in recovery by restoring strength and reducing soreness, requiring a core temperature of over 38.5°C for 20 minutes to be effective. Studies show that combined mechanical and thermal stress induces a cumulative HSP response, enhancing cellular protection. Thermal stress alone peaks at 16- 24 hours, whereas mechanical stress shows a biphasic response, with peaks at 3-6 hours and around 39 hours. Thus, combining heat with exercise could optimize HSP production, improving recovery by increasing and accelerating the HSP response. However, more research is needed to determine the best timing for thermal stress in human applications, especially in sports and therapy contexts. This study aimed to compare the effects of hot-water immersion administered before versus after muscle-lengthening exercise on muscle function and HSP70 expression in healthy young athletes.
Interventions
- Other Immersion
Immersion lasted 40 minutes with the goal of reaching a core temperature of 38.5°C in the heat-stress groups - Other NIRS
NIRS - Other isokinetic dynamometer
isokinetic dynamometer - Other pressure algometer
pressure algometer - Other Hokanson armband
Hokanson armband
Primary outcome measures
- HSP 70 concentration [Time frame: 1 year]
Secondary outcome measures (2)
- gastro-intestinal temperature [Time frame: 1 year]
- muscle temperature [Time frame: 1 year]
Eligibility criteria
Inclusion criteria
- Sex: Healthy, athletic men practicing track and field (10 to 12 hours/week)
- Age: 19 to 25 years old
- Social security coverage
- Signed informed consent
Exclusion criteria
- Age over 26 years
- Low level of physical activity (less than 8 hours per week)
- Recent sprain (type 1, 2, or 3) or ligament rupture in the lower limb (within the last 8 months)
- Exposure to an altitude of 2500m within 15 days prior to the protocol
- Presence of arterial hypotension:
- Systolic blood pressure below 90 mmHg
- Diastolic blood pressure below 60 mmHg
- A drop in systolic blood pressure greater than 20 mmHg upon moving from a lying to a standing position.
- A drop in diastolic blood pressure greater than 10 mmHg upon moving from a lying to a standing position.
- Presence of dizziness, lightheadedness, or blurred vision upon moving from a lying to a standing position.
- Participant under guardianship/conservatorship or deprived of liberty.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Single blind
- Primary purpose
- Other
Study locations
France · 1 center
- CHRU Amiens — Amiens
Identifiers
NCT: NCT07559344 · PI2025_843_0182