Understanding Why Aging Differs
Everyone ages, but not everyone ages well. While some individuals remain active, independent, and cognitively healthy into later life, others experience early decline, chronic illness, or reduced mobility. Understanding why these differences occur is at the heart of aging research at McMaster University, where scientists are focused on identifying the biological, social, and environmental factors that shape how we age.
By uncovering what drives healthy aging, researchers aim to help more people live longer lives with better health, independence, and quality of life.
The Canadian Longitudinal Study on Aging (CLSA)
Scope and Global Significance
A cornerstone of this effort is the Canadian Longitudinal Study on Aging (CLSA), a landmark 20-year research initiative tracking the health and well-being of more than 50,000 Canadians. Launched in 2011, the CLSA is the largest and most comprehensive aging study ever conducted in Canada.
The study gathers extensive data on physical health, biology, cognition, mobility, mental health, and social and environmental conditions, creating an unparalleled dataset that allows researchers to understand how aging unfolds over time.
According to Parminder Raina, Lead Principal Investigator of the CLSA and Scientific Director of the McMaster Institute for Research on Aging (MIRA), the depth and scale of the data have made the CLSA a global research resource, attracting scientists from around the world.
Funded by the Government of Canada, the Canadian Institutes of Health Research, and 11 partner universities, the CLSA represents one of the largest national investments in aging research worldwide.
McMaster and MIRA: A Hub for Aging Researc
Interdisciplinary Approach to Aging
McMaster University serves as the CLSA’s home base, housing its coordination centre, a major data collection site, and the Biorepository and Bioanalysis Centre, which stores and analyzes biological samples nationally.
Building on this foundation, MIRA, launched in 2016, brings together researchers from all six McMaster faculties to address aging as a complex, interconnected process. Biological, clinical, psychological, social, and environmental factors are studied together, reflecting the real-world experience of aging.
“Aging does not happen in silos,” explains Raina. This interdisciplinary model enables practical solutions that extend beyond traditional academic boundaries.
Translating Research Into Real-World Impact
The Optimal Aging Portal
Research impact goes beyond discovery. MIRA’s Optimal Aging Portal is its flagship knowledge-translation platform, offering plain-language, evidence-based information on aging for older adults, caregivers, healthcare professionals, and policymakers.
Through articles, videos, webinars, and curated resources, the portal ensures that scientific evidence is accessible and usable in everyday life. This commitment to public engagement strengthens the bridge between research and real-world decision-making.
Mobility as a Cornerstone of Healthy Aging
Wearables and the MacM3 Study
Mobility is one of the strongest predictors of independence and quality of life in older adults. MIRA is internationally recognized for its leadership in mobility research, including the McMaster Monitoring My Mobility (MacM3) Study.
This pioneering study follows more than 1,500 participants using wearable devices equipped with GPS and accelerometers. Led by Marla Beauchamp, Canada Research Chair in Mobility and Aging, MacM3 is the first study of its kind to identify early mobility changes that may signal future health risks.
EMBOLDEN Program
Another flagship initiative, EMBOLDEN (Enabling Mobility, Balance, and Resilience in Older Adults), focuses on understanding and preventing mobility decline, falls, and loss of independence. Led by Rebecca Ganann, the program emphasizes translating research into community programs, clinical practice, and policy.
Intergenerational and Cognitive Aging Research
Aging outcomes can differ significantly across generations, even among individuals with similar risk factors. The MIRA-iGeN (Intergenerational Study on Aging) examines how family relationships, caregiving, education, work, and socioeconomic conditions shape long-term health and resilience.
MIRA also leads major initiatives in brain health and cognitive aging, using longitudinal data, biomarkers, neuroimaging, and digital tools to identify early indicators of cognitive decline and dementia. Research into chronic pain and musculoskeletal health further addresses major contributors to disability and reduced mobility in older adults.
Equity-Driven Community Partnerships
Equity is central to MIRA’s mission. Through its partnership with Dixon Hall in Toronto, MIRA grounds research in lived experience, particularly among culturally and linguistically diverse and vulnerable older populations.
The MIRA | Dixon Hall Centre, directed by Beauchamp, generates evidence to inform more inclusive services, policies, and care models that reflect real community needs.
Preparing for Canada’s Aging Future
By 2035, nearly one in four Canadians will be over the age of 65, a demographic shift mirrored worldwide. While this reflects advances in medicine and public health, it also demands evidence-based, equitable responses.
As Raina emphasizes, the ultimate goal is not just to understand aging, but to change aging trajectories, enabling people to remain mobile, independent, and engaged throughout later life. This is where MIRA continues to establish itself as a global leader in healthy aging research.
