Challenge Family and MaccaX have announced a multi-year partnership between the world's fastest-growing long-distance triathlon series and the online coaching platform run by two of triathlon's most successful athletes ever, Chris "Macca" McCormack and Belinda Granger.

This partnership will see all of the Challenge Family's 44 full and half distance triathlons offer MaccaX custom training plans from 2015 on, delivered through interactive calendars on-line and on mobile devices.

Macca, a four-time Challenge Roth champion and Challenge Family ambassador, is thrilled about the partnership.

"Belinda and I will be helping write and approve custom training plans (men's and women's) for all 43 of the Challenge races in 2015. Better yet, we've pledged to keep the prices way down, under $50. We want these to be accessible to as many competitors as possible so they can have some solid structure in place and feel confident come race day that they've done the work necessary to have a great day."

Athletes will enjoy access to Macca, Belinda, and other industry experts to answer their training- and racing-related questions for better preparation. They will also benefit from the exclusive community aspect of MaccaX, networking with like-minded people around the world for support, friendship, and encouragement.

"We're delighted to partner with Macca, Belinda and the Macca X team, providing our athletes with access to expertise provided by some of the sport's most respected athletes," said Challenge Family CEO, Zibi Szlufcik. "We place significant importance on our partnerships, providing real value to athletes of all abilities with a focus on unbeatable quality and building a true triathlon community."