Fueling and training, explained.

How to choose the best calorie tracker for endurance athletes: training-aware targets, integrations, carb guidance, logging speed and price model.

Apple Watch nutrition tracking explained: how food data gets into Apple Health, how the watch estimates active and resting calories, and their limits.

Calories burned cycling, running and swimming, with worked estimates from power meters, pace and METs, plus the assumptions behind every number.

Carb loading for a marathon, 70.3 or Ironman: 10 to 12 g/kg a day for 36 to 48 hours, how to cut fiber, who benefits, and an example 2-day loading plan.

How many carbs per hour cycling? Evidence-based ranges by ride length, from 30 to 60 g/h up to 90 g/h, and what the research says about 120 g/h.

Should you eat back exercise calories? For endurance athletes, mostly yes. How much of the number to trust, when to eat it, and how deficits fit in.

Garmin nutrition tracking explained: how food logging works in Garmin Connect+, why Garmin calorie burn is an estimate, and how to set daily targets.

How accurate are Garmin, WHOOP and Apple Watch calories? What validation studies show about wearable calorie error and how to use the numbers.

How much glycogen can you store? Muscle and liver amounts, how fast endurance training uses it, how fast it comes back, and why it is hard to measure.

How to lose weight while training for endurance: a modest deficit, the right point in the season, enough protein, and fuel for the hard sessions.

Looking for a MyFitnessPal alternative for athletes? Compare apps that set calorie and carb targets from your training, plus integrations and pricing.

Why a power meter gives a better cycling calorie estimate than heart rate: kJ of work, gross efficiency, why kJ is near kcal, and what skews heart rate.

Protein for endurance athletes: 1.2 to 2.0 g/kg a day, what IAAO studies add, per-meal doses, timing, and an example day for cyclists and runners.

Rest day vs training day nutrition for endurance athletes: carbs in g/kg for each day type, why protein stays steady, and example days for a 70 kg rider.

The signs of under-fueling in endurance athletes, from missed periods and low testosterone to stalled training, and when to see a doctor about REDs.

What to eat before a long ride or long run: 1 to 4 g/kg of carbs 1 to 4 hours before, low fat and fiber, how much to drink, and example pre-session meals.

WHOOP nutrition tracking explained: what WHOOP logs, how to bring food data in from other apps, and why WHOOP calorie burn numbers are estimates.