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R.E. Hengsterman
Four Minutes That Move the Needle: A Shift-Proof Workout That Lowered Blood Pressure and HbA1c in Rotating Shift Workers
This was done on the job, around real shifts, with treadmills/bikes/rowers and a simple heart-rate target. No elaborate gear. No hour-long classes. Just a precise burst, repeated
R.E. Hengsterman
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