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Clinical Trial Summary

In this proposal, the investigators challenge the assumption that following the physical activity guidelines implies benefit for ALL adults, and that if benefit is not achieved in response to first line therapy, it will be by simply exercising more. Thus, for improving cardiorespiratory fitness and cardiometabolic risk factors, unanswered questions include: 1) To what extent, regardless of exercise amount or intensity, is exercise not associated with benefit? Demonstration of a resistance to benefit through exercise in a substantial number of adults would be a novel and important finding, would counter the assumptions of many if not most health care practitioners, and could have immediate and direct application in all health care settings. 2) To what extent will non-responders to first line therapy (150 min/wk) be required to increase exercise amount or intensity to achieve benefit? 3) To what extent will failure to improve CRF segregate (be associate with) with cardiometabolic risk factors? The investigators propose that adults who remain exercise resistant for improvement in CRF and cardiometabolic risk despite increasing amount or intensity are at high risk of metabolic disease and consequently, are candidates for alternative treatment strategies. 4) To what extent is biological sex and/or phenotype a determinant of response or non-response to exercise?


Clinical Trial Description

The trial has three objectives: Primary objective: Determine whether alterations in exercise amount and intensity improves the rate of clinically meaningful improvements in aerobic exercise capacity as measured by cardiorespiratory fitness (CRF, VO2peak) among adults. Secondary objective: Determine whether common cardiometabolic risk factors segregate with respect to variation in CRF to first line therapy in adults, and, whether clinically meaningful improvements in cardiometabolic risk factors segregate with associated improvement in CRF. Tertiary objective: Identify whether biological sex and/or phenotype are determinants of variation in CRF and cardiometabolic risk factors in response to first line therapy, and, whether they predict variability in CRF response to alterations in exercise dose. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT04304092
Study type Interventional
Source Queen's University
Contact
Status Withdrawn
Phase N/A
Start date January 1, 2022
Completion date April 1, 2026

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