Gretchen Reynolds is the author of The First 20 Minutes: Surprising Science Reveals How We Can Exercise Better, Train Smarter and Live Longer. She also writes the “Phys Ed” column for the New York Times each week.
Gretchen Reynolds is the author of The First 20 Minutes: Surprising Science Reveals How We Can Exercise Better, Train Smarter and Live Longer. She also writes the “Phys Ed” column for the New York Times each week.