Multiple Risk Factor Intervention Trial (Ms. FIT)

Summary

This study aims to produce new evidence, specific to women, on the efficacy and mechanisms of exercise and diet for cardiometabolic risk reduction in pre and postmenopausal women. Using a 3-arm randomized controlled trial (RCT) with equal recruitment and stratification by menopausal status to 6 months of: 1) exercise following Health Canada guidelines; 2) the same exercise plus counselling to follow Canada's Dietary Guidelines to improve diet quality; or 3) stretching group, this study will answer the following questions:

* How does the impact of exercise compare among each of the causal links between physical inactivity and cardiometabolic disease in women?
* What is the effect modification of adding a diet quality intervention to exercise?
* What is the effect modification by menopausal status?

The investigators hypothesize that exercise adaptations will be: 1) largest peripherally, including Matsuda index (primary outcome), Homeostatic Model Assessment of Insulin Resistance (HOMA-IR), arteriovenous oxygen difference (avO2diff), and visceral fat, compared to centrally (stroke volume (SV), endothelial function, aortic stiffness), 2) blunted or absent in post vs premenopause; 3) enhanced by the addition of diet quality which will be essential or additive for Matsuda index, metabolic syndrome, Framingham cardiovascular disease (CVD) risk, cytokines and adipokines, thigh myosteatosis, muscle mass, peak oxygen uptake (VO2peak), 4) enhanced by adding diet quality in more outcomes postmenopause.

Conditions

• Metabolic Disturbance
• Sedentary Behavior

Interventions

BEHAVIORAL

Behavioural Experimental: guidelines-based physical activity

Through a combination of exercise trainer-led in-person and virtual sessions, as well as counselling for independent aerobic exercise, participants will be guided to achieve 150 weekly minutes of moderate-intensity aerobic activity and twice weekly whole-body muscle strengthening.

BEHAVIORAL

Behavioural Experimental: guidelines-based physical activity and healthy eating

Behavioural Experimental: guidelines-based physical activity: Through a combination of exercise trainer-led in-person and virtual sessions, as well as counselling for independent aerobic exercise, participants will be guided to achieve 150 weekly minutes of moderate-intensity aerobic activity and twice weekly whole-body muscle strengthening. Behavioural Experimental: guidelines-based healthy eating: One-on-one phone/virtual counselling from a registered dietitian to change dietary habits to be in line with Canada's Food Guide.

BEHAVIORAL

Behavioural: Stretching exercise

Twice weekly virtual instructor-led whole-body stretching.

Sponsors & Collaborators

• Canadian Institutes of Health Research (CIHR)

  collaborator OTHER_GOV

• University of Toronto

  lead OTHER

Principal Investigators

• Amy A. Kirkham, PhD · University of Toronto

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

SINGLE

Model

PARALLEL

Eligibility

Min Age

30 Years

Sex

FEMALE

Healthy Volunteers

No

Timeline & Regulatory

Start

2024-05-03

Primary Completion

2027-08-01

Completion

2028-08-01

Countries

• Canada

Study Locations