Why Strength Is the Foundation of Health in Midlife (And the Research That Proves It)
Sustainable Training Stretch Rayner Sustainable Training Stretch Rayner

Why Strength Is the Foundation of Health in Midlife (And the Research That Proves It)

Many men in their 40s and 50s rely on cardio workouts, circuit training or HITT classes to stay “fit enough.” Take Mark, a 50-year-old who jogs a few times a week and does body-weight circuits occasionally. He figures that as long as he keeps his weight in check and his heart pumping, he's healthy.

But recent science suggests a missing piece: building and maintaining muscle strength.

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My 2025 Functional Blood Work: Blood Sugar, Stress & Performance – Part 6
Sustainable Health, Sustainable Stress Stretch Rayner Sustainable Health, Sustainable Stress Stretch Rayner

My 2025 Functional Blood Work: Blood Sugar, Stress & Performance – Part 6

In the first five parts of this series, I unpacked a lot.

From immune system stress and gut health to liver, kidney, and hormone function. This post might not sound as exciting as “testosterone” or “gallbladder,” but it’s just as important, maybe even more.

Why?

Because blood sugar regulation isn’t just about diabetes or fat loss. It’s about performance, recovery, energy, and brain clarity, especially in midlife.

And when I reviewed my latest blood markers, a few things jumped out that most GPs would skim over... but from a functional lens, they’re full of clues.

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