Ask Well: 20 Seconds to Better Fitness?
By GRETCHEN REYNOLDS
A reader asks: Is there a specific amount of time at which to keep your heart rate up during interval training to get the most benefit?
Published: March 17, 2016 at 08:00PM
from NYT Health http://ift.tt/1UlwHWk
Ask Well: 20 Seconds to Better Fitness? GRETCHEN REYNOLDS A reader asks: Is there a specific amount of time at which to keep your heart rate up during interval training to get the most benefit? http://ift.tt/1UlwHWk http://ift.tt/1pselpA Health The New York Times March 17, 2016 at 08:00PM