Why start now

Get healthier now so later stays full.

Strength, muscle, and aerobic fitness fade slowly at first, then faster. The 40s and 50s are when they still respond best to effort. That makes now the cheapest time to build a reserve.

A smiling woman with a backpack and knit hat on a foggy hiking trail — Photo: Kampus Production / Pexels (model; not an endorsement)

3–8%

Typical loss of muscle mass per decade after age 30, faster after 60.

Source: Volpi et al., 2004

>20%

Per-decade drop in aerobic capacity by the 70s, up from about 3–6% in the 20s and 30s.

Source: Fleg et al., Circulation, 2005

+18%

Gain in VO2 max after two years of training in sedentary adults averaging 53 years old.

Source: Howden et al., Circulation, 2018

The baseline is simpler than you think

The CDC recommends that adults get at least 150 minutes a week of moderate activity, like brisk walking, plus 2 days of muscle-strengthening activity that works the major muscle groups (CDC). Add balance work as you get older, protect your sleep, and build from there.

Where to go next

Why your 40s decide how your 60s feel: the research behind this page.
Strength training after 40: a two-day plan you can start this week.
Recovery and sleep in midlife: making the work pay off.