Why I Plan My Training in 14-Day Cycles, Not 7-Day Weeks

Where this came from

I did not invent the 14-day framing. I adopted it from the Get Fast podcast, where the coaches lay out a sustainable 5-day structure built around frequency, duration, and intensity in that priority order. The bones of this post — 5 hard per fortnight, bike as volume, run as quality, hard equals intensity times duration — are theirs. What follows is how I apply it as an age-group long-course triathlete with a job and a household, not a re-pitch of the coaching itself.

The 5-per-fortnight rule

The default endurance lore says "one hard session per week." The Get Fast version stretches the unit. 5 hard sessions across 14 days, not 5 per 7. Some weeks I run three hard, the next I run two. Sometimes I stack two hard pieces on the same day and earn a fully easy day next to it. The fortnight is the accounting unit; the week is just a shape inside it.

What this lets me do is insert real rest. A 7-day cycle with two hard days punishes any life event — a travel day, a kid sick, a long work block — by collapsing the week's hard work into one rushed session. A 14-day cycle absorbs that. If Monday and Tuesday disappear, I still have 12 days to land 5 quality pieces. The plan does not break the first time real life touches it.

The other thing it lets me do is sustain the protocol for longer. My Norwegian Method training week sits inside this fortnight frame. The lactate-anchored two-threshold-day template is the maximal version of a week. The 14-day cycle is what allows the next week to be lighter without me feeling like I have failed the plan.

Frequency before duration, duration before intensity

The priority order is the part that has changed how I make decisions when a session is in trouble. Frequency first. Duration second. Intensity last.

What that means in practice: if I have 30 minutes instead of 90, I do a short easy session — I do not skip the day. Frequency holds. If I have time but the legs are empty, I keep the duration easy and drop the intensity. Duration holds, intensity goes first. The thing I will not cut, except for genuine sickness or injury, is the frequency of touching each discipline. Five-day-a-week training only works because the five days actually happen.

The reframe matters because most age-groupers cut in the wrong order. They protect the big intense set, sacrifice the easy session that surrounds it, and call the result "quality work." It is not. The easy session is what makes the intense one adaptable. Cutting frequency to protect intensity is the inversion of the rule.

Bike as volume, run as quality

The discipline-level rule I took from the podcast is that biking should carry the most volume and running should carry the highest intensity. That sounds backwards if you grew up with run-heavy programmes, but it survives an injury budget where cycling does not.

The highest-intensity session in my fortnight is on the run. The flagship piece is 5x8 min at a hard but controlled effort — long enough to be aerobic, short enough to actually be hard. The reason running owns the top of the intensity ladder is that running gives me the most adaptation per minute of work, but only in small, concentrated doses. A weekly 5x8 plus the threshold work inside my Norwegian template is plenty.

That run-driven intensity translates onto the bike. The aerobic and threshold systems do not care which leg muscles drive them; once I have built top-end on the run, the longer bike intervals at threshold ride more smoothly. Bike intervals trend longer — think 3x20 min or 2x30 min at threshold — because the bike is the volume discipline. High duration, ceiling-ed intensity. Run handles the short and sharp; bike handles the long and sustained.

"Hard = intensity x duration"

The reframe that has changed how I count my hard sessions is the formula. Hard is not "above threshold." Hard is intensity multiplied by duration. A one-hour sweetspot bike block, well below threshold power, often costs me more than a 20-minute threshold piece. Total work done is the right unit, not peak watts.

Concrete example from my own training. The Tuesday 5x8 min hard run might take 40 minutes of work and feel brutal in the moment. The Sunday bike — three hours, two of them in sweetspot — never has me gasping. But the Sunday ride is harder by the formula and harder in the recovery cost. I count it as one of the 5 hard sessions in the fortnight even though the intensity number on its own would say "endurance."

The practical use of the formula is in how I distribute. If I have already done one long sweetspot ride and one threshold run in a week, I have spent more "hard" budget than the headline session count would suggest. That is when I ease off, even though my calendar still says I have three hard days in the bank.

When to retest

The plateau signal in the podcast framework is that when results stall, the usual cause is more VO2 work being needed — and that decision should be informed by a retest, not by guesswork. I have been thinking about getting retested for that reason. The numbers I am running easy and threshold sessions off are months old. The legs are telling me something has shifted, but the meter is the only thing that confirms which direction.

The protocol I run for that retest is in the sibling post: my lactate-threshold testing protocol. Same framework as my Norwegian week — finger-prick samples at the end of stepped intervals, rebuild LT1 and LT2 heart rates from the readings, then carry those zones into the next fortnight. If a retest comes back showing the LT2 has crept up, the programme stays as is. If LT1 has drifted but LT2 has not, the answer is more VO2 work inside the existing 5-per-fortnight count.

What this isn't

This is not a coaching plan. The 5-per-fortnight count is mine and is calibrated to my recovery capacity, my work load, and the volume my joints will absorb. Someone with more training age, more recovery margin, or fewer life commitments will hold a higher count. Someone newer to long-course will collapse under it.

Set your own count. Start from the priority order — frequency before duration before intensity — and work backwards from how many quality sessions you actually recover from inside a fortnight. The original framework is the Get Fast podcast linked at the top. What I have written here is how I have adapted it, not a prescription. The honest read on this post is that the bones are theirs; the application is mine.