Lactate Threshold
The lactate threshold is the exercise intensity at which blood lactate starts to rise sharply because the body can no longer clear it as fast as it is produced.
LT stands for lactate threshold.
Definition
The lactate threshold is the point during increasing exercise intensity where blood lactate concentration begins to climb steeply, signalling that production has outstripped clearance. Below it, effort feels sustainable for long periods; above it, fatigue accumulates comparatively quickly. It is often reported as a pace, power output, or heart rate, and can be measured in a lab from graded exercise tests or approximated in the field.
Because it marks the intensity an athlete can hold for extended efforts, the lactate threshold is a strong predictor of endurance performance, frequently more useful for pacing than VO2 max. Training at or just below it (threshold training) aims to push the threshold to a higher intensity. The term describes a physiological marker, not a workout, though the two are commonly discussed together.
Where you’ll hear “lactate threshold”
Sports that use this term:
Running
The most accessible endurance sport — no venue, just shoes and the open road or trail.
Cycling
A low-impact endurance sport that doubles as transport, exercise and adventure.
Swimming
A full-body, low-impact endurance sport suitable for almost every age and ability.
How it connects
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Commonly confused with
Close enough to be mixed up — the distinction is worth knowing.
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Lifestyle
- No equipmentActivities and workouts you can do with little or no gear, using mostly your own body.
- At homeMovement you can do in your living room — from bodyweight strength to yoga — with little or no equipment.
- 1 hourA full hour opens up almost any sport, from a proper game to a longer ride, run or gym session.
- 10 minutesTen focused minutes is enough for a quick, worthwhile session — a short run, a compact circuit or a mobility routine.
- 15 minutesShort, focused bursts of movement you can fit into a spare 15 minutes, with no long session required.
People
- RetireesHow sport can fit newly free time in retirement — an opportunity to be active, social and purposeful, at a comfortable and well-guided pace.
- Returning to sportHow to ease back into sport after a break, rebuilding gradually and listening to your body.
- TeenagersHow sport can fit into a teenager’s life for fitness, friendship, confidence and healthy routines, with supervision.
- Busy professionalsHow time-efficient sport can fit a packed schedule to protect fitness, energy and stress relief.
- ParentsHow busy parents can fit sport around family life with flexible, home-friendly and time-efficient options.
Movement patterns
- SquatA knee-dominant pattern: bending the hips, knees and ankles to lower and rise while keeping the torso upright — the foundation of lower-body strength.
- JumpThe plyometric pattern of projecting the body off the ground through explosive triple extension and controlling the landing — the core expression of lower-body power.
- CarryHolding and transporting a load while keeping the trunk braced and stable — an anti-movement pattern that builds grip, core stability and full-body strength.
- GlideGlide is continuous, low-resistance locomotion in which the body holds a streamlined shape so that momentum generated by a preceding propulsive action carries it smoothly across a surface or through a medium.
Sports science
- Aerobic and anaerobic energyThe difference between energy the body produces with oxygen and energy it produces without it — a core idea behind why different efforts feel and last so differently.
- Training adaptationThe process by which the body changes in response to repeated training — the underlying reason exercise makes you fitter, stronger or more skilful over time.
- Force and powerThe difference between how much force the body can produce and how quickly it can produce it — the mechanics behind strength and explosiveness.
- Motor learningThe process by which practice and experience produce lasting improvements in how well a movement skill can be performed.
- Energy systemsHow the body supplies energy for movement — the different pathways that power everything from an explosive jump to a long, steady run.
Exercises
- BurpeeA full-body exercise combining a squat, a plank, and a jump in one flowing movement.
- Push-upA classic upper-body pushing exercise where you lower and press your body up from the floor.
- Tricep dipA pushing exercise where you lower and raise your body using your arms on parallel bars or a bench.
- PlankA core-holding exercise where you keep your body in a straight line supported on forearms and toes.
- Chin-upA pulling exercise similar to a pull-up but with palms facing you, involving the biceps more.
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- Provenance
- Tier A — evergreen educational
- Verified external sources
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- Content updated
- 2026-08-04
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