The notebook

Training notes from the coach.

The thinking behind the plans, the science I lean on, and the patterns I watch for. No fluff, no listicles, just the way I actually coach.

A lone runner on an open road under a hazy amber sky, distant hills blurred by wildfire smoke.
Heat & summer · 11 min read

Running in bad air quality: a coach's AQI playbook.

When the AQI spikes, most runners either bail on the week or run anyway and feel wrecked. Here is the coach's threshold chart for when to run, when to shorten the session, and when to move it indoors.

Coach Johnny Crain
Coach Johnny Crain
July 18, 2026
A marathon finish-line arch under a low sun, finisher banners overhead.Marathon

Marathon taper: the three-week protocol most runners get wrong.

Most tapers fail because runners cut the wrong thing. The 3-week protocol: what to drop, what to keep, and when your last hard workout should land.

Johnny Crain10 min
A runner in orange sprinting down a red outdoor track during an interval session.Pacing

How to run faster: a coach's eight-week protocol

Want to run faster? The eight-week protocol a 2:12 marathoner uses with athletes, with the strides, threshold work, and form fixes that actually move pace.

Johnny Crain10 min
A wide field of everyday marathon runners moving down a broad city avenue at sunrise, seen from behind.Marathon

Average marathon time: what the numbers actually mean for your race

The global average marathon time is around 4:30. What that number actually means, why it doesn't set your goal, and how to pick a real target.

Johnny Crain9 min
A runner pausing at the side of a sunlit gravel path, one hand resting lightly above the kneecap.Recovery

Runner's knee: the real cause and the protocol that heals it.

It is not a knee problem, it is a hip and load problem. Why rest alone fails, and the four-phase protocol that actually heals it.

Johnny Crain10 min
A runner walking on a treadmill beside tall windows in a dim modern gym.Pacing

Treadmill pace chart: MPH and KPH conversions for every running speed.

Convert MPH and KPH to real running paces, plus the 1% incline rule and how to actually train indoors.

Johnny Crain10 min
Runners crossing the start line of the Cherry Creek Sneak 5K in Denver on a rainy race day.5K & 10K

How many miles is a 5K? And how to actually train for one.

3.1 miles is the easy answer. The harder one is how to pace and build for it without blowing up at the line.

Johnny Crain10 min
A solo runner mid-stride at sunrise on an empty country road, breath visible in cold air.Marathon

How to run a marathon: the complete coach's guide.

From your first long run to the start corral, the full arc of building toward 26.2 without breaking down along the way.

Johnny Crain11 min
An elite marathon pack mid-race, the leaders tightly grouped.Marathon

The science-backed marathon training guide: engineering your fastest 26.2.

The physiology that actually moves the needle, and how to structure a block around it instead of guessing.

Johnny Crain9 min
The Boston Marathon finish line on Boylston Street on race day.Marathon

How to qualify for Boston: a masterclass in personalized training.

A BQ is a precision project, not a volume contest. Here is how a coach builds the plan that gets you there.

Johnny Crain8 min
An exhausted runner checking watch splits with their head bowed.Recovery

How to avoid running burnout using recovery data.

The early signs of overreaching show up in your data before they show up in your legs. Here is what to watch.

Johnny Crain8 min
A runner on a forested trail at an easy, conversational pace.Easy runs

Is your easy run pace too fast? The science of slowing down to speed up.

Most runners run easy days too hard and hard days too easy. The fix is simpler, and slower, than you think.

Johnny Crain8 min
A runner mid-deadlift in a home gym, focused on form.Strength

Strength training for runners: what actually carries over.

Not every lift makes you faster. Here are the movements that build durable, resilient running, and the ones to skip.

Johnny Crain9 min
A solo runner on shimmering desert asphalt under a brutal summer sun.Heat & summer

The physiology of summer running: why heat is the poor man's altitude.

Train smart through the heat and you bank adaptations that pay off all fall. Push too hard and you cook your season.

Johnny Crain10 min
A GPS running watch resting on a notebook with handwritten pace zones.Pacing

What is VDOT in running? And how a coach actually uses it.

VDOT turns a race result into training paces. The number is easy; knowing when to trust it is the coaching.

Johnny Crain12 min

Want this dialed in by an actual coach?

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