The science of CBD, or cannabidiol, and endurance sports performance.

This Week In Running’s trail and ultra recap for May 17, 2021.

Reviews of the Tifosi Tsali and Tifosi Swank running sunglasses.

A picture of longevity, American ultrarunning icon Tim Twietmeyer has run the American River 50 Mile 41 times.

A review of the Arc’Teryx Norvan SL 2 trail running shoes.

Hannah Green writes about learning to trust herself in the outdoors—and life.

Physiotherapist Joe Uhan explains how efficient running leads to healthier running and living.

A video interview with Maggie Guterl after her win of the 2021 Cocodona 250 Mile.

This Week In Running’s trail and ultra recap for May 10, 2021.

Win one of five pairs of the La Sportiva Cyklon built around the BOA Fit System. (Contest open globally.)

AJW’s love letter to Georgia’s rugged and difficult Duncan Ridge Trail.

A collection of 50 (mostly) trail shoes that hit shelves in the first half of 2021.

An in-depth profile of Māori runner Paora Raharaha.

An interview with 49-year-old Liza Howard, creator of the “Age-Old Runners” series.

A video interview with Aliza Lapierre after her win of the 2021 UROC 100k.

How to adapt running nutrition principles to your individualized needs.

This Week In Running’s trail and ultra recap for May 3, 2021.

A review of the 100% Speedcraft sunglasses.

AJW writes about the emergent scientific idea that endurance-athlete performance is linked with high fatigue resistance.

A video review of the Brooks Catamount trail running shoes.