The Supplement PRO Edition has arrived, featuring Ross Edgley on the cover sharing how he prepared for his world-record-attempt swim around Iceland. 

Plus: 

Inside the Elite Mind: A neuroscientist uncovers what's really going on inside the heads of top athletes. 

The Science of Lifting: Discover why more weight isn't always the path to more gains. 

HYROX champion Tim Wenisch's go-to workout of the day, and a high-carb, high-protein pasta dish to fuel your training. 

You'll also receive a free digital subscription, delivered straight to your inbox.