NCT07019285

Interval Training and Plasma Volume Variation

Comparative Effects of High- vs. Moderate Intensity Interval Walking Training on Plasma Volume Variations, Hematological and Muscle-Damage Markers in Overweight/Obese Postmenopausal Women

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 32 (actual)
• Sponsor: Wissal Abassi · Academic / Other
• Sex: Female
• Age: 45 Years – 59 Years
• Healthy volunteers: Not accepted

Summary

The goal of this clinical trial is to to compare the effects of high (HIIWT) versus moderate-intensity interval walking training (MIIWT) on body composition, plasma volume variations (PVV), hematological parameters, muscle damage and aerobic capacity in overweight/obese postmenopausal women. The main question it aims to answer is:Does HIIWT and MIIWT improve kidney function markers in this population? Researchers will compare HIIWT to MIIWT and to non-training intervention(designed to control group) to see if the training program at different intensities work to improve kidney function markers. Participants in HIIWT group will: perform a 8-week HIIWT program, three sessions per week (5 repetitions of 6-min-walking-test (6MWT) at 90-110% of 6MWTdistance measured at baseline, interspersed by 6-min of active recovery between repetitions). Participants in MIIWT group will: perform a 8-week MIIWT program, three sessions per week (5 repetitions of 6-min-walking-test (6MWT) at 60-80% of 6MWTdistance measured at baseline, interspersed by 6-min of active recovery between repetitions). Participants in control group will : not perform any physical training and maintain their usual daily activities.

Detailed description

In obese postmenopausal women, hematological disturbances, reduced plasma volume, and elevated muscle damage biomarkers are associated with impaired oxygen delivery, reduced aerobic capacity, and increased risks of cardiovascular disease, sarcopenia, and functional decline. While responses to exercise are well documented in young healthy individuals, evidence in this high-risk population remains scarce. The purpose is to compare the effects of high (HIIWT) versus moderate-intensity interval walking training (MIIWT) on body composition, plasma volume variations (PVV), hematological parameters, muscle damage and aerobic capacity in overweight/obese postmenopausal women.Thirty-two overweight/obese postmenopausal women were randomly assigned to HIIWT (n = 11), MIIWT (n = 11), or control (CON, n = 10) groups. HIIWT and MIIWT groups performed intermittent walking at 90-110% and 60-80% of the 6-min-walking-test distance, respectively, 3 times/week for 8 weeks (60 min/session). Body composition, hematological and muscle damage markers, and 6 min walk test (6MWT) were assessed pre- and post-intervention. PVV was calculated after eight weeks under third conditions (HIIWT, MIIWT and CON).

Conditions

• Hematologic Tests

Interventions

Type	Name	Description
BEHAVIORAL	High intensity interval walking training	High intensity intermittent walking training for a period of 8 weeks. The intensity of the training is 90 to 110% of 6MWTdistance. The frequency of the training is three times a week
BEHAVIORAL	Moderate-intensity interval walking training	Moderate intensity intermittent walking training for a period of 8 weeks. The intensity of the training is 60 to 80% of 6MWTdistance. The frequency of the training is three times a week

Timeline

• Start date: 2025-01-06
• Primary completion: 2025-03-16
• Completion: 2025-03-16
• First posted: 2025-06-13
• Last updated: 2025-06-17

Locations

1 site across 1 country: Tunisia