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Good morning. The single muscle that helps predict sprint speed, what 19 years of data say about lifting and diabetes, and a simple rule for getting better as a coach. Let's get into it.
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A new study of 66 Division I football players, shared this week by Andy Galpin, found that the size of the psoas major tracked top sprint speed better than any other muscle.
By the numbers:
Psoas major volume explained around 50% of the variance in peak sprint speed - more than any glute or quad
Gluteus medius (~45%) and gluteus maximus (~37%) came next
The best three-muscle combo (psoas major, gluteus medius, piriformis) reached ~59%, a ceiling
That leaves 40%+ of speed to factors size can't capture: tendons, fiber type, limb proportions
These are correlations, not a prescription - but they line up with a decade of sprinter research on the hips.
A new JAMA Network Open study followed 143,715 adults for nearly two decades and tied resistance training to lower type 2 diabetes risk.
By the numbers:
2+ hours of resistance training per week was associated with 27% lower T2D risk vs none
A "consistently high" training pattern across midlife carried 42% lower risk
Consistency mattered more than volume - sustained training lowered risk even at modest levels
Lowest risk came from meeting both aerobic and resistance guidelines plus under 2 hours/day of TV
Observational, but one of the largest looks yet - 143,715 adults over nearly two decades.
In a Steelers.com Q&A, offensive line coach James Campen shared a development idea from Tom Lovat, father of Steelers head S&C coach Mark Lovat: no single mentor makes you a complete coach, so take 10% of the best from every coach you've worked under. Stack enough of those, Lovat told his assistants, and you're most of the way there - while staying open to learning more.
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