Effects of Moderate-Intensity Underwater Recumbent Ergometer Exercise at Different Water Temperatures on Renal Hemodynamics

Effects of Moderate-Intensity Underwater Recumbent Ergometer Exercise at Different Water Temperatures on Renal Hemodynamics - The WT-URE-RH Study

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000061521

Enrollment

Registered

2026-05-11

Start date

2026-02-25

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

healthy adults

Interventions

15 minutes of underwater recumbent ergometer exercise at 26 degrees Celsius water temperature 15 minutes of underwater recumbent ergometer exercise at 36 degrees Celsius water temperature 15 minutes o

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: 1. No abnormalities in electrocardiographic findings or renal function as confirmed by a health checkup. 2. Agreement to participate in this study after receiving an explanation of its purpose.

Exclusion criteria

Exclusion criteria: 1. Musculoskeletal disorders of the lower limbs that may interfere with pedaling exercise. 2. Current smoking. 3. Allergy to zinc, acrylic materials, or alcohol used in the measurement procedures. 4. Presence of an accessory renal artery with a vessel diameter comparable to that of the main renal artery.

Design outcomes

Primary

Measure	Time frame
Renal artery maximum blood flow velocity (MnV)	—

Secondary

Measure	Time frame
Heart rate; Cardiac parasympathetic nervous activity (LnHF); Blood pressure; Rating of perceived exertion (RPE); Oxygen uptake (VO2); Urine volume.	—

Countries

Japan

Contacts

Public ContactKumiko ONO

Kobe University Graduate School of Health Sciences

onoku@tiger.kobe-u.ac.jp078-792-2555

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026