2026-05-24 · zones, heart rate, pace, training, intensity
The two ways to control session intensity work on different logic. When HR wins (almost always), when pace wins (when terrain is flat and you know what you're doing), and why mixing them tends to backfire.
2026-05-24 · vdot, ftp, css, metrics, multisport
Three metrics that measure the same physiology (aerobic / anaerobic threshold) in different disciplines. When to use each, why they aren't interchangeable, and how they fit together if you're a triathlete.
2026-05-23 · vdot, daniels, running, metrics
VDOT in plain English. What the number Jack Daniels coined actually means, why it's the best way to compare runners and forecast race times, and how to get yours from a single recent race.
2026-05-25 · [trail, ultra, night, safety, gear]
2026-05-24 · tapering, periodization, peak, race day
What Mujika, Bosquet, and Pyne actually found about backing off volume without touching intensity. How much to drop, how many weeks, and the mistakes that cost you minutes on race day.
2026-05-24 · recovery, training, trail, running
The real difference between full rest and active recovery, when each one makes sense, what to do between hard sessions, and why a poorly-done rest day hurts your performance.
2026-05-23 · ultra, trail, utmb, periodization, beginners
Marathon to 50K/55K in the mountains. The real volume you need, how to break it into phases, what to drop and what to add versus a road plan, and how not to break before the start line.
2026-05-23 · vetta, positioning, training software, amateur athlete
Vetta Trainer is built for the serious amateur athlete who wants real metrics without paying a fortune. Auto-engine, multi-language, real predictions for trail at altitude. We tell you what we do well and what we don't yet.
2026-05-23 · philosophy, polarized, threshold, periodization
The three intensity distributions everybody in endurance argues about. Which one fits which athlete, and how to pick without drowning in the theory.
2026-05-24 · 10k, sub-40, running, periodization, weekly plan
The model week the Vetta engine uses for a sub-40 10K athlete. 5-6 sessions, intensity split, what each one does and how to string them across 12 weeks. Not a recipe — a skeleton you can adapt.
2026-05-25 · [marathon, nutrition, physiology, glycogen]
2026-05-24 · nutrition, trail, ultra, hydration, aid stations
How many carbs per hour, which gels actually work, how to handle electrolytes in heat, and how to train your gut. The practical guide that should be in every trail app and isn't.
2026-05-24 · trail, power hiking, ultra, mountain, technique
On steep climbs, walking hard (power hiking) is more efficient than running. When to switch, correct technique, how to train it, and why elites use it on purpose.
2026-05-24 · strength, trail, gym, injury prevention, kilian
Strength is what separates the runners who finish ultras intact from those who don't. Here: which exercises move the needle, how many times a week, how to combine with running, and the 25-minute no-equipment routine that works.
2026-05-24 · ftp, cycling, power, zones, threshold
How to estimate your FTP without buying a power meter. 20-min test, 8-min test, LTHR + Karvonen, GAP in simulators, and the ramp test. Accuracy comparison, downsides, and when to use each one.
2026-05-25 · [recovery, stress, hrv, sleep]
2026-05-24 · stretching, injury prevention, runners, flexibility
Static stretching before running doesn't prevent injuries. Dynamic stretching before and mobility after does help. Here's what the evidence supports and what's inherited ritual.
2026-05-25 · [nutrition, ultra, trail, carbs]
2026-05-24 · altitude, training, physiology, mountain
What altitude training actually does, how it affects performance during and after, how many weeks make sense, and the difference between live-high-train-low, live-high-train-high, and just showing up to race.
