Run Training

Easy is defined by sustainable, low-cost effort and by how you feel afterwards, not by a fixed pace offset or a duration rule.

Source: General running coaching reference

The main driver is psychological rather than physiological: easy running feels too slow to feel like training.

Source: General running coaching reference

The talk test is useful and cheap, but it is a blunt instrument with a wide band of efforts that pass it.

Source: General running coaching reference

The mechanical cost of running rises with speed, so easy running is how volume is accumulated with tolerable tissue load.

Source: General running coaching reference

Easy running drives the peripheral aerobic adaptations that underpin everything faster, which is why it is not filler.

Source: General running coaching reference

The practical floor is mechanical, not metabolic: adaptation continues at very low intensity, but a broken-down gait is not useful running.

Source: General running coaching reference

Easy is an effort ceiling, not a pace target, so on fatigued legs the pace falls while the effort stays where it belongs.

Source: General running coaching reference

Slightly-too-hard easy running lands in a costly middle ground: enough fatigue to compromise quality sessions, not enough stimulus to be one.

Source: General running coaching reference

A recovery run is the softest version of easy running; anything that adds real fatigue defeats its purpose.

Source: General running coaching reference

New running frequency should arrive as easy volume, because the tissues need time to tolerate more impact days.

Source: General running coaching reference

The long run's distinctive stimulus is duration: sustained aerobic work plus the tissue loading of many extra foot strikes.

Source: General running coaching reference

Common rules of thumb cluster around a quarter to a third, but they are conventions rather than proven optima.

Source: General running coaching reference

Connective tissue adapts more slowly than the cardiovascular system, so long-run duration should creep upward, not leap.

Source: General running coaching reference

Gut tolerance is trainable and situation-specific, and the jostling of running challenges it differently from cycling.

Source: General running coaching reference

The long ride shares the aerobic and durability work, and impact load accumulates across the whole week. Judge the ceiling by whether your other runs and key sessions still go well afterwards.

Source: General triathlon coaching reference

The long run's value comes from duration you can absorb and repeat, and racing it wrecks the following week.

Source: General running coaching reference

A short quality finish is a useful specific stimulus, but it converts an absorbable run into a session with real recovery cost.

Source: General running coaching reference

A partial long run banks most of the benefit, whereas forcing the full session while depleted mostly buys injury risk.

Source: General running coaching reference

Both benefit from long running, but only the longer-course athlete needs the long run to rehearse race-duration demands.

Source: General running coaching reference

A fixed distance quietly punishes slower runners with much more time on feet. Time does not make the mechanical dose identical, but it keeps it far closer.

Source: General running coaching reference

Threshold marks the top of the sustainable range, where lactate stops accumulating faster than the body can clear it.

Source: General running coaching reference

Threshold is a modelling convenience over a continuous transition, and the various lab and field methods disagree by real margins.

Source: General running coaching reference

The signature of threshold is control at a hard effort: strained but steady, and never a race to the finish.

Source: General running coaching reference

A continuous tempo block of roughly 20 minutes is a standard, absorbable dose; the other shapes are either unsustainable weekly or a different session type.

Source: General running coaching reference

Breaking the effort into blocks is mainly a way to bank more quality minutes than you could hold in one unbroken piece.

Source: General running coaching reference

The purpose is time at a specific effort, and overshooting buys a few fast minutes at the price of the session's actual target.

Source: General running coaching reference

Threshold is repeatable but not free, and in a three-sport week the total hard load has to be shared across disciplines.

Source: General running coaching reference

A warm-up lets the aerobic system and tissues come online so the main set starts at the intended effort rather than a shock.

Source: General running coaching reference

A sprint run is short enough to be raced at or near threshold, while a 70.3 run is held meaningfully below it. That changes which threshold sessions genuinely rehearse race demands.

Source: General triathlon coaching reference

An all-out effort of about half an hour to an hour sits close to threshold, which makes it a workable field reference.

Source: General running coaching reference

Reps of a few minutes are long enough to drive oxygen uptake near maximum and hold it there, which is the point of the session.

Source: General running coaching reference

Recoveries are dosed to protect the quality of the remaining reps, which is what determines the session's stimulus.

Source: General running coaching reference

A two to four minute climb is long enough to drive oxygen uptake high, and the hill both softens the impact and stops you overcooking the pace. Very short maximal hill sprints are a different tool entirely.

Source: General running coaching reference

Reps of a few minutes with short jog recoveries is the classic shape. The others are hill sprint work, threshold running, and a short maximal session with full recovery.

Source: General running coaching reference

An isolated short effort is over before oxygen uptake peaks. Repeated short reps with incomplete recovery keep it elevated across the set, so more than one session shape is defensible.

Source: General running coaching reference

Devastation is not the goal; the goal is repeatable quality, and using suffering as the scorecard reliably wrecks the following days.

Source: General running coaching reference

High-intensity running is potent but expensive, so it is used in small, deliberate doses inside a three-sport week.

Source: General running coaching reference

Very hard work is a sharpening tool that is built on top of aerobic volume, so it is concentrated rather than permanent.

Source: General running coaching reference

Cycling is non-impact and supported, so the same cardiovascular work is far gentler on tissue than fast running.

Source: General running coaching reference

Coaches commonly aim for something like 12-20 minutes of quality running in a VO2max session; beyond that the stimulus flattens off while the fatigue cost keeps climbing.

Source: General running coaching reference

Strides are brief accelerations lasting well under a minute, run fast but under control and separated by generous recovery.

Source: General running coaching reference

Strides are run quickly but submaximally; straining to sprint flat out adds risk without adding to the intended stimulus.

Source: General running coaching reference

Full recovery keeps each repetition sharp; strides are deliberately not a fatigue-accumulating session.

Source: General running coaching reference

A few seconds of fast running followed by full recovery produces a neuromuscular stimulus, not the sustained metabolic stress that defines intervals.

Source: General running coaching reference

Because the total fast running is tiny, strides attach to easy days or precede quality work without changing the week's overall hard-easy structure.

Source: General running coaching reference

The point of strides is a small, repeatable dose of fast running that adds almost nothing to the week's fatigue.

Source: General running coaching reference

Hill sprints are maximal but extremely brief, with long recoveries, which is what separates them from hill repetitions.

Source: General running coaching reference

An effort of a few seconds is over before the aerobic or lactate systems are meaningfully stressed; the stimulus is neuromuscular force production. The incline reduces braking forces, but the calf and Achilles still work hard.

Source: General running coaching reference

This is the speed reserve idea: the larger the gap between top speed and race pace, the lower the relative effort of holding race pace.

Source: General running coaching reference

High-force capabilities are use-it-or-lose-it, so a small ongoing dose of fast running preserves them through long endurance blocks.

Source: General running coaching reference

Running injuries are overwhelmingly gradual-onset overuse problems, which is why the training history matters more than the moment the pain appeared.

Source: Sports medicine overview of running injuries

Tissues adapt to load they are prepared for; the mismatch between demand and current capacity is the useful way to think about risk.

Source: Sports medicine overview of running injuries

Surveys consistently report the knee as the single most commonly injured region in runners, with the lower leg and foot close behind.

Source: Epidemiology of running injuries

Medial tibial stress syndrome presents as spread-out pain along the inner shin; the other patterns describe different problems entirely.

Source: Sports medicine overview of running injuries

Tendon pain characteristically warms up during activity and returns later or the next morning, so improvement mid-run is not reassurance.

Source: Sports medicine overview of tendinopathy

Focal bone pain that intensifies with continued running is a recognised warning sign and warrants assessment rather than pushing on.

Source: Sports medicine overview of bone stress injuries

The next-day response is more informative than in-run sensation for muscle and tendon, because many niggles feel better while warm. It does not apply to focal bone pain, which needs assessment regardless of how it feels the next day.

Source: General running coaching reference

Returning at a reduced load and progressing according to how symptoms respond avoids repeating the mismatch that caused the problem.

Source: General running coaching reference

Symptoms tend to lag the causal loading, so the relevant change is often a few weeks back rather than in the last session.

Source: General running coaching reference

Rest addresses irritation but not capacity, which is why a graded return with loading generally follows it.

Source: Sports medicine overview of running injuries

The best-supported running-specific effect of strength training is improved running economy; it is not a route to a higher maximal oxygen uptake.

Source: Research reviews on strength training and running economy

Running never loads both legs at once, so single-leg exercises reflect the actual demand and reveal asymmetries a two-legged lift can hide.

Source: General strength and conditioning reference

Single-leg work needs progressive loading to build capacity; done only as unloaded balance work it develops little.

Source: General strength and conditioning reference

The calf-Achilles complex is among the most heavily loaded structures in running, so its capacity is a frequent focus of run-specific strength work.

Source: Sports medicine reference on lower limb loading in running

Evidence linking hip weakness to specific running injuries is mixed, so hip work is best framed as building capacity rather than as prevention.

Source: Research reviews on hip strength and running injury

Jumping and bounding target elastic energy return and tendon properties; the performance gain reported in endurance runners varies between studies.

Source: Research reviews on plyometric training in endurance runners

Plyometrics add high-rate loading to tendons and bone, so they suit athletes with a base and no active lower-limb symptoms.

Source: General strength and conditioning reference

Trials of stretching for injury prevention have produced mixed and largely unconvincing results, even though stretching can change range of motion.

Source: Research reviews on stretching and injury risk

Running is impact loading, so quality run sessions are best run on legs not freshly fatigued by lifting. Clustering hard work on the same day keeps easy days genuinely easy.

Source: General strength and conditioning reference

Gym work builds capacity, but it does not cancel out a mismatch between running load and current preparedness.

Source: General strength and conditioning reference

Uneven, unpredictable footing forces continual adjustment of stride length and foot placement, which costs speed and makes pace less steady than on tarmac.

Source: General running coaching reference

A track's value is measurement: known distances and a consistent surface let you compare splits session to session. It still loads the body and still needs a warm-up.

Source: General running coaching reference

The runner still propels themselves and uses the same musculature, but the absent air resistance and unchanging, perfectly flat surface make the two settings similar rather than equivalent.

Source: General running coaching reference

The convention traces to a small study whose finding was clearest at faster running speeds. Treat 1% as a reasonable default, not a precise correction.

Source: General running coaching reference

Runners unconsciously alter leg stiffness to keep loading fairly similar across surfaces, and studies have not produced a clear hardness-to-injury link.

Source: General running coaching reference

Grass is a good option for varying the load on easy runs, but soft, uneven ground hides dips and holes, so footing risk goes up.

Source: General running coaching reference

Roads are built to shed water, so running along one side is effectively running on a slight side slope. Alternating sides or direction spreads that asymmetry.

Source: General running coaching reference

Technical ground demands quick, accurate foot placement, which is exactly what tiredness degrades. Save the roughest terrain for sessions run on fresher legs.

Source: General running coaching reference

General fitness transfers, but the specific pacing and footing skills do not fully transfer, so build some race-surface work into the key sessions.

Source: General running coaching reference

Soft sand deforms under each step, so energy is lost into the surface and the lower leg works considerably harder than on firm ground.

Source: General running coaching reference

Specificity comes from arriving at the run with race-like fatigue and then holding race effort; an easy ride removes the very condition you are trying to rehearse.

Source: General triathlon coaching reference

The disorientation and heaviness are short-lived, so a leisurely changeover leaves you rehearsing an ordinary run instead of a transition.

Source: General triathlon coaching reference

A quality bike plus a race-effort run carries a real recovery cost, so it has to occupy a key-session slot rather than sit on top of the existing load.

Source: General triathlon coaching reference

The value is in learning what target effort feels like on deeply fatigued legs; total run mileage is better built in standalone runs.

Source: General triathlon coaching reference

Simulations are useful occasionally, but racing your training repeatedly buys fatigue at the price of the steady work that produces adaptation.

Source: General triathlon coaching reference

High leg turnover off the bike commonly makes actual pace feel faster or slower than it is, so an objective reference is what trains the judgement.

Source: General triathlon coaching reference

Changing one variable keeps the load increase manageable and makes it clear which change produced the response.

Source: General triathlon coaching reference

The brick should mirror the effort you will actually hold, and that effort is higher and shorter-lived in sprint and Olympic racing than over middle distance.

Source: General triathlon coaching reference

Whether your stomach copes with race nutrition once you start running is a race-day unknown unless you rehearse the real plan in the real sequence.

Source: General triathlon coaching reference

A correctly executed brick reproduces race conditions: sustainable bike effort followed by a run you can actually hold, not a heroic effort that ends in a blow-up.

Source: General triathlon coaching reference

Triathlon running happens on pre-fatigued legs, so closing that gap is the progress that matters. The gap must close from below, not because the fresh run has declined.

Source: General triathlon coaching reference

A race split is the output of the whole day, so a slower run may reflect an over-hard bike or a failed nutrition plan rather than run fitness.

Source: General triathlon coaching reference

A benchmark is only a comparison if the conditions around it are held constant; otherwise you are measuring the conditions, not yourself.

Source: General triathlon coaching reference

Aerobic improvement shows as more output for the same internal cost, so the pace-to-heart-rate relationship shifts in your favour.

Source: General triathlon coaching reference

Day-to-day heart rate is noisy for reasons that have nothing to do with fitness, so read direction over weeks rather than one session's number.

Source: General triathlon coaching reference

The comparison ignores both the training allocation and the fatigue you start the run with, so it says little about whether your triathlon run is improving.

Source: General triathlon coaching reference

When fresh run fitness is demonstrably rising, the race-day shortfall usually sits upstream in how the bike leg was ridden and fuelled.

Source: General triathlon coaching reference

Adaptation takes weeks, and benchmarks are demanding sessions, so testing too often adds fatigue while measuring noise.

Source: General triathlon coaching reference

Context is what turns a number into evidence; a headwind or a heavy training week explains a slow benchmark that would otherwise look alarming.

Source: General triathlon coaching reference

Fitness gains often appear first as resistance to fatigue, so the late portion of long efforts holds together better even if peak pace is unchanged.

Source: General triathlon coaching reference