None listed
Conditions
Brief summary
The purpose of this study is to evaluate the effectiveness of an 8-week hot-water immersion or high-intensity interval training (exercise) intervention on ambulatory blood pressure. This study aims to compare hot-water immersion or high-intensity interval training for improving ambulatory blood pressure in people with hypertension. It is hypothesised that 8-weeks of regular hot-water immersion exposure will improve ambulatory blood pressure to a greater extent than exercise.
Interventions
Participants will be randomised to either 3 sessions per week of hot-water immersion in 40°C water or high-intensity interval training, for 8 weeks.
Hot water immersion (40°C)
Location: School of Physical Education, Sport and Exercise Sciences Aquatic Facility (University of Otago, Dunedin).
Supervision: This session will be supervised by an American College Sports Medicine (ACSM) registered clinical exercise physiologist (CEP) and a research assistant; all supervising researchers are first a
Participants will be randomised to either 3 sessions per week of hot-water immersion in 40°C water or high-intensity interval training, for 8 weeks. Hot water immersion (40°C) Location: School of Physical Education, Sport and Exercise Sciences Aquatic Facility (University of Otago, Dunedin). Supervision: This session will be supervised by an American College Sports Medicine (ACSM) registered clinical exercise physiologist (CEP) and a research assistant; all supervising researchers are first aid trained. Attendance and session particulars (e.g., physiological indices etc.) will be recorded at each session by the supervising researcher. Exposure: Participants will complete three hot-water immersion sessions per week in 40°C water. Participants will be seated (or semi-recumbent) with water approximately top-sternal level. Duration: Bathing duration will progressively increase from 20 to 30 min if tolerable (20 min first week, 25 min second week and 30 min third and subsequent weeks).
Sponsors
University of Otago
Study design
Allocation
Randomised controlled trial
Primary purpose
Treatment
Masking
Open (masking not used)
Eligibility
Sex/Gender
All
Age
35 Years to No maximum
Healthy volunteers
No
Inclusion criteria
- Aged 35 years or older; - Prescribed and regularly taking at least one anti-hypertensive medication; -Fulfils the Physical Activity Readiness Questionnaire Plus questionnaire criteria, or participant's physician provides medical clearance for study participation; - Able to give written consent; - Able to travel to the study centre to complete all sessions
Exclusion criteria
-Aged less than 35 years; -Contraindication to maximal exercise testing; -Not "passing" the Physical Activity Readiness Questionnaire Plus questionnaire, and physician refuses medical clearance for study participation; -Angina; -Recent myocardial infarction (less than 3 months ago); -Implanted cardiac device (i.e. ICD, pacemaker etc.); -Heat intolerance; -Current pregnancy; -History of large blood pressure decreases or fainting; -New anti-hypertensive pharmaceutical initiated recently (i.e., less than 30 days since initiation); -Any other medical condition deemed a significant risk to study participation.
Outcome results
None listed