How to Measure, Predict, and Improve Your Functional Age with Scott Fulton

How well we age isn’t defined by how long we live or whether we avoid disease; it’s defined by how long we can keep doing the things we love and need to do. In this episode, I’m joined by Scott Fulton, an internationally recognized redefiner in the positive aging space, researcher, author, and adult educator who teaches healthspan and aging at three prominent universities.

Scott explains why functional ability, what we are physically and cognitively able to do in everyday life, may be one of the most powerful and overlooked predictors of healthy aging. We explore Scott’s concept of “functional age,” which compares how well you move, balance, recover, and react relative to your chronological age, and why this framework may be more meaningful than many traditional health markers. Scott introduces five key domains of function, strength and power, cardiovascular capacity and recovery, mobility and balance, flexibility and structure, and neuromotor function and cognition, and explains how weaknesses in any one of these areas can limit independence later in life.

Our conversation highlights how surprisingly simple, free, at-home tests, such as walking speed, chair stands, balance tests, and reaction time, can predict health trajectories decades in advance. We also discuss why focusing on just one metric, like VO2 max or strength alone, can create blind spots, and how building balanced functional “reserve” across all domains is essential for resilience, fall prevention, and long-term independence.

Here are the details of our conversation:

[00:04:46] How Scott arrived at the concept of functional age

[00:05:47] Why current healthspan metrics fall short

[00:09:27] Redefining healthspan as independence and capability

[00:11:59] The chair stand test and future dependency

[00:17:37] The five domains of functional health

[00:23:02] Simple, at-home tests that predict long-term function

[00:25:49] How to move from the 50th to the 75th percentile

[00:29:04] Why your weakest link determines healthspan