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Multidimensional Modeling to Maximize Adaptations to eXercise: The M3AX Trial Rationale and Study Design.

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This summary is machine-generated.

Individual responses to exercise vary significantly, impacting aging. This study uses a novel trial to identify factors behind this exercise response heterogeneity (IRH) and develop personalized training strategies for older adults.

Keywords:
Combined TrainingGeroscienceHeterogeneitySkeletal Muscle

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Area of Science:

  • Gerontology and Exercise Science
  • Molecular Biology and Aging
  • Personalized Medicine

Background:

  • Age-related functional decline affects intrinsic capacity, healthspan, and quality of life.
  • Exercise mitigates aging hallmarks, but individual responses (inter-individual response heterogeneity, IRH) vary significantly.
  • Mechanisms underlying IRH and effective mitigation strategies remain largely elusive, prompting focused research initiatives.

Purpose of the Study:

  • To classify individual responsiveness to combined endurance and resistance training in older adults.
  • To interrogate the mechanistic underpinnings of exercise response heterogeneity (IRH).
  • To develop and test strategies for boosting exercise responsiveness in older adults.

Main Methods:

  • A two-phase Sequential Multiple Assignment Randomized Trial (SMART) design was implemented.
  • Phase I involves classifying individual responsiveness and interrogating mechanistic underpinnings.
  • Deep in vivo, ex vivo, and molecular phenotyping will be used to establish responsiveness biocircuitry and build predictive models.

Main Results:

  • The study is designed to classify individual exercise responsiveness.
  • Mechanistic underpinnings of IRH will be investigated using comprehensive phenotyping.
  • Predictive models for personalized exercise prescriptions will be developed.

Conclusions:

  • Understanding the factors underlying IRH is crucial for optimizing exercise interventions in older adults.
  • This research aims to provide a basis for personalized exercise prescriptions tailored to individual responsiveness.
  • The findings are expected to enhance the clinical efficacy of exercise training for improving healthspan and quality of life in aging populations.