Training load management, injury prevention, taper strategy, and performance chart guides for ultra runners chasing 50K to 100-mile finishes.
Ultras are won on your aerobic engine — but the anaerobic one gets you up the climbs and to the finish. Here's how the two energy systems work, why you need both, and how to train them without wasting a week.
CTL, ATL, and TSB tell you if you're getting fitter or just more tired. Learn how ultra runners use the Performance Management Chart to peak on race day.
CTL, ATL, TSB — the three lines on your Performance chart look intimidating, but they're the most useful numbers in HARDN. Here's what they mean, what good numbers look like, and the one thing most runners get wrong.
Most training apps assume you just started training. You haven't. When you set your training start date in HARDN, everything changes — your plan, your progress, your HARDN Score, and your AI Coach all reflect the work you've already done.