What is ‘Jeffing’? The Olympian-approved running method fights muscle fatigue — and helps you finish races faster
admin 24 hours agoUSA UpdateComments Off on What is ‘Jeffing’? The Olympian-approved running method fights muscle fatigue — and helps you finish races faster0 Views
Developed by a former Olympian, “jeffing” is an interval training method that encourages people to alternate between walking and running at their own pace, gradually building speed and endurance over time.
