runnersworld.com
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Runner's World is a comprehensive running site. It offers training plans, workouts, injury prevention tips, nutrition guidance, gear reviews, and race information for runners of all levels.
More resources on Running & Marathon Training
McMillan Running
Greg McMillan's pace calculator turns a recent race result into equivalent time predictions and target paces for recovery, tempo, and interval workouts. The site also sells structured training plans and coaching for road and trail distances.
Strength Running
Coach Jason Fitzgerald's articles, podcast, and courses on injury prevention, strength work, and race preparation. Useful for runners who keep breaking down and want to understand why, plus how to structure supporting work around mileage.
r/running Wiki
Community-maintained FAQ covering how to start running, common training plans such as Couch to 5K and Hal Higdon, shoe selection, pacing, and injury basics. A reasonable orientation before committing to a structured program.
Citius Mag
Track and field's biggest names on the track, in the coaching ranks and within the industry sit down and open up in-depth to share brilliant insights and vivid snapshots from their professional/personal accomplishments and experiences in the sport. Hosted by CITIUS MAG founder Chris Chavez. The show was named one of "The Best Running Podcasts" by Runner's World. ▶ Visit https://CITIUSMAG.com ▶ Twitter: https://twitter.com/CitiusMag ▶ Instagram: https://instagram.com/citiusmag ▶ YouTube: https://www.youtube.com/c/CitiusMag ▶ Patreon: https://patreon.com/citiusmag
Nutrition for Endurance Sports: Marathon, Triathlon, and Road Cycling
Peer-reviewed review from the 2010 IOC sports nutrition consensus on fuelling marathon, triathlon and road-cycling races. Covers causes of fatigue (dehydration, carbohydrate depletion, gut distress, heat, sodium imbalance) and evidence-based intake targets, including multiple-transportable carbohydrates up to 90 g per hour.
From Polarized to Individually Optimized Endurance Training... in 5 Steps
Recorded lecture for the ACSM Northland regional chapter in which exercise physiologist Stephen Seiler walks through five steps of endurance training design, covering intensity distribution, session duration, and how hard intervals should be dosed against a large low-intensity base.