Use HRV to Nail Your Chicago Marathon Taper

Use HRV to Nail Your Chicago Marathon Taper

We are only moments aways!  The Chicago Marathon is on October 12, 2025, and you have already locked in hydration and fueling within my last two blogs. The last piece I want you to use is heart rate variability, or HRV.  HRV is the small, natural variation in the time...