Good morning. New research shows strength training boosts grades across multiple subjects, a smartphone app gets validated for Nordic hamstring testing, and how one week of bad sleep tanks your health. Let's get into it...
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📚 Strength Training Boosts Academic Performance
A study of over 67,000 students found that muscle-strengthening exercise (push-ups, sit-ups, weightlifting) was associated with better academic performance across all subjects. Peak benefits appeared at 4-5 days per week: up to 39% better in Math, and 31% in English. Even 1 day per week showed an 11% increase in performance.
The association held after controlling for moderate-to-vigorous physical activity, suggesting MSE has independent academic benefits—likely through improved brain function, executive function, and self-regulation. Read More
😴 One Week of Short Sleep Wrecks Everything
Dr. William Wallace compiled research showing what happens after just one week of 4-5 hour sleep in healthy adults: testosterone dropped 15%, insulin sensitivity dropped 20%, muscle protein synthesis dropped 19%, hunger hormones rose 28%, and cortisol rose 51%.
Wallace's point: "No supplement, no diet hack, no training program outperforms sleep at keeping systems online." You can't outwork bad sleep. Read More
📱 My Jump Lab Validated for Nordic Hamstring Testing
The IUSCA's International Journal of Strength and Conditioning published validation for the My Jump Lab smartphone app in measuring break point angle (BPA) during the Nordic Hamstring Exercise. Testing 24 participants, results showed very high correlation (r > 0.9) with kinematic analysis and excellent inter-rater reliability (ICC > 0.9). Coefficient of variation was ≈1% with standard error under 1.3 degrees.
The app offers a valid, reliable, and portable alternative to isokinetic dynamometry for hamstring assessment. Read More
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US Soccer Federation | view
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Mount St. Mary’s University | view
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Bridgewater College | view
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