I teach medical students, and we barely cover this: muscle strength may be more important than cardio for survival.

A JAMA Network Open study of 5,400+ ...
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Assessment of SARC-F Sensitivity for Probable Sarcopenia Among Community-Dwelling Older Adults: Cross-Sectional Questionnaire Study Background: The European Working Group on Sarcopenia in Older People (EWGSOP2) recommends the use of the 5-item SARC-F questionnaire by clinicians to screen for probable sarcopenia. The recommended threshold of ≥4 has low sensitivity and high specificity in identifying probable sarcopenia. While this high threshold is capable of excluding clients without probable sarcopenia, difficulty lies in using this screening tool to identify clients with low muscle strength. Objective: This study aims to reassess the SARC-F as used in a primary care clinic for the determination of the incidence of probable sarcopenia and to determine if a test of handgrip strength is necessary for diagnosis of probable sarcopenia. Methods: We screened 204 patients ≥ 65 years (117 men, 87 women) during routine visits with the SARC F. Probable sarcopenia was defined by EWGSOP2 grip strength cut points (≤ 27 kg for men, ≤ 16 kg for women). Receiver operating characteristic (ROC) analysis identified the SARC F threshold that best balanced sensitivity and specificity. Results: Probable sarcopenia was present in 12% of participants. Age (73.9 ± 6.2 y) and BMI (29.5 ± 5.8 kg/m²) did not differ by sex, but men showed higher grip strength (36.3 ± 8.1 kg vs 22.4 ± 5.5 kg, P < .001) and lower SARC F scores (0.9 ± 1.7 vs 1.9 ± 2.3, P < .001). A SARC F cut point of ≥ 2 yielded an AUC of 0.77 (95% CI 0.67–0.88), with sensitivity 0.78, specificity 0.75, accuracy 0.77, PPV 0.31, and NPV 0.96. Grip strength differed significantly between screen positive and screen negative groups at both the ≥ 2 and ≥ 4 thresholds (P < .001). Conclusions: A SARC- F threshold of ≥2 is recommended as an optimal tradeoff between sensitivity and specificity when identifying community-dwelling older adults with probable sarcopenia. This is lower than the currently accepted recommendation of ≥4. Our findings promote the recommended early detection and treatment by medical professionals by the EWGSOP2 by improving the ability to identify individuals with low muscle strength with this screening procedure.

Open‑access paper xmed.jmir.org/2025/1...

Would you spend 1 extra minute to catch 4 more sarcopenia cases per 200 patients?

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The loss of muscle with age is predictable -and preventable. It starts early and can lead to real problems later. The answer- a resistance program that works for you now. The sooner you start, the bigger the payoff.

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In our latest episode, MindRight CEO Chris “Bernie” Bernard shares what’s next for the brand—and it’s bigger than brain bars.
This episode is for the high-performance crowd
🎧 Can Snacks Boost Your Brain? out now!

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Muscle isn’t just meat. It’s biological tech, built for survival. 🧠💪
We break down the real science of how it grows, how we mess it up, and how to train smarter.
Read the blog. Rock the gear. Build smarter.
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I did a 12-week fat loss challenge—but the goal wasn’t just weight loss. I wanted to keep my strength too 💪
Ever tried to lose fat without losing muscle?
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Let’s talk about what actually works 👇

Losing strength doesn’t just change your workouts.
It changes your independence, your recovery, your life.

Here are 3 real stories that changed how I see muscle forever:
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Propst Medical Health & Healthspan | David Propst | Substack Science-backed strategies for fat loss, muscle preservation, and metabolic health—helping you optimize metabolism and longevity with evidence-based insights. Click to read Propst Medical Health & Healthspan, by David Propst, a Substack publication. Launched 10 days ago.

So…what’s stopping you? And how can I help?

Check out my free Substack for more on staying strong for life. ⬇️

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