Fitness routines that will stick in 2026 Crunch fitness instructor Danelle Rivera joins 'Fox & Friends' to help jump start Americans' fitness resolutions for the new year. NEW You can now listen to Fox News articles! President-elect John F. Kennedy highlighted the importance of a physically fit and healthy America to remain a strong nation in his Sports Illustrated article "The Soft American". Decades later, the physical and mental health of Americans are far too often neglected, putting our