Every high-intensity entry in the Typed movement library. Each one is a full page: what it does, stage by stage, and what the evidence says.
- Alpine SkiingThe thighs burn on a long run because they are holding position rather than moving — a contraction they get almost no chance to rest from.
- American FootballThe work lasts a few seconds; what separates players is how much of their power is back before the next snap.
- Australian FootballThe running volume belongs to a distance event, but the collisions and the leaping sit on top of it rather than replacing it.
- BadmintonA shuttlecock slows down faster than any other ball in sport, so a rally is a chain of accelerations and stops rather than a steady run.
- BaseballAlmost all of the physical cost of baseball is paid in a handful of seconds spread across three hours.
- BasketballThe running is what tires you during a game; the landings are what accumulate across a season.
- Battle RopesUpper-body conditioning that spikes your heart rate like sprinting, without the impact.
- BMXAfter the first straight, the fastest riders are often the ones pedalling least — speed is carried by pushing and pulling the bike through the bumps rather than by turning the cranks.
- BoundingEvery stride is a single-leg landing that has to be turned into the next take-off, so ground contact is where the training happens.
- Box JumpBox height measures how high the knees can be tucked, not how high the body actually rose.
- BoxingA punch starts at the floor: the back foot turns, the hips rotate, and the arm only delivers what the legs and torso produced.
- Brazilian Jiu-JitsuGrip is usually the first thing to fail, and losing it decides more rounds than getting out of breath does.
- Broad JumpDistance depends on the angle you leave the ground at as much as on how hard you push.
- BurpeeMost of the cost is not the push-up or the jump — it is dropping the whole body to the floor and lifting it back up again, over and over.
- Change-of-Direction CutMost of the braking happens on the step before the one you plant, which is why a cut is decided a stride early.
- Circuit TrainingTrains strength and cardio at once, and does neither quite as well as doing them separately.
- CricketA bowler repeats the same violent, one-sided action dozens of times an hour while everyone else on the field barely moves.
- Depth JumpThere is a simple test for whether your box is the right height: if you cannot jump higher than you can from standing, it is too tall.
- DivingEverything the dive will do is decided at the moment the feet leave the board — after that you can only change how fast you spin.
- FencingAlmost every action is performed by the same leg leading and the same arm extending, for years — few sports are as one-sided as this one.
- Field HockeyEvery stick in the game is a right-handed stick by rule, so the sport bends every player into the same one-sided posture regardless of which hand they favour.
- Figure SkatingIce gives back almost no friction, so a landing that a runner would spread across a whole foot arrives through one thin steel edge.
- Gaelic FootballSolo runs, high catches and legal shoulder charges sit inside a match that never settles into a steady pace.
- GymnasticsA gymnast's hardest strength positions involve no movement at all — the body is held still while the muscles produce close to everything they have.
- HandballEvery jump shot ends with a single-leg landing after a sprint, and a match contains dozens of them.
- HIITShort, hard efforts that keep burning calories after you stop.
- HurlingThe stick doubles the length of the arm, so a swing that looks like a flick of the wrists is actually the whole torso turning at speed.
- Ice HockeyA skating stride pushes sideways rather than backwards, which is why hockey players' groins take a beating that runners' never do.
- JudoA throw works by getting your hips under someone else's centre of gravity, which is why size matters less than it looks like it should.
- Jump RopeHigh impact in the useful sense — one of the better stimuli for bone density.
- Jumping JacksRaising the arms overhead on every repetition is what makes the heart rate climb, far more than the jumping does.
- KarateThe low stances are not decoration — holding them is what makes the legs strong enough to throw a strike that finishes in one movement.
- KickboxingA kick and a punch are powered from the same place — the back foot turning over — which is why the two have to be learned as one movement, not two.
- LacrosseThe stick never stops moving, so the forearms are working even during the parts of the game that look like rest.
- Martial Arts & BoxingSkill practice that happens to be intense — and the learning is much of the benefit.
- Mixed Martial Arts (MMA)Grappling is mostly holding hard against someone who is moving, which fatigues muscle in a way that punching and kicking never do.
- Mountain BikingThe forearms are often working hardest on the descents, when the legs have stopped pedalling altogether.
- Muay ThaiThe kick lands with a nearly straight leg swung from the hip, so the shin arrives as one rigid bar rather than a whipping foot.
- NetballThe footwork rule means you must stop dead the instant you catch, so every possession ends in a hard deceleration.
- PickleballThe small court is what makes it demanding — there is nowhere to retreat to, so the ball comes back before you have finished recovering from the last shot.
- PlyometricsJump training that works through a stretch reflex — and only if ground contact is brief.
- RacquetballThere are four walls and no out of bounds, so a rally ends when someone cannot reach the ball, not when it leaves the court.
- Rock ClimbingA strength sport where working out the route limits you as much as your body does.
- RugbyThe game alternates between full-speed running and standing collisions, and the two demand almost opposite kinds of fitness.
- SkateboardingBetween tricks you are never actually still — small constant corrections at the ankles are what a session is mostly made of.
- Skater JumpJumping sideways means landing sideways, and the muscles that stop your knee caving inwards are the ones being trained.
- Sled Push & DragPushing without any lowering phase — brutally hard, and almost no soreness afterwards.
- SnowboardingBoth feet are locked to one board, so you cannot correct a mistake by moving one leg — the whole body has to do it.
- SoccerMost of the distance is jogging; the moments that decide matches are the twenty-odd sprints inside it.
- SoftballUnderhand feels gentler than overhand, but the forces trying to pull a windmill pitcher's shoulder out of its socket are comparable.
- Speed SkatingThe blade never pushes backwards — it pushes sideways, which is why the inner thigh and outer hip work far harder than they ever do running.
- Sprint IntervalsAll-out efforts lasting seconds, with a recovery cost far bigger than the time suggests.
- SquashThe ball comes back off the front wall whether you are ready or not, which is what removes the rest.
- Sumo WrestlingMost bouts are over in seconds, so almost nothing in a sumo match is endurance — it is one enormous burst decided before either wrestler is out of breath.
- SurfingAlmost the entire session is spent lying face down on a board pulling yourself through water, and that is the part that changes your body.
- Table TennisThe ball crosses the table faster than a person can consciously react, so the skill being trained is anticipation rather than reflex.
- TaekwondoKicking height depends on how fast you can lift the leg, not on how far you can stretch it cold.
- Team & Racquet SportsStop-start hard effort, with a social and thinking layer machines do not have.
- TennisAlmost no time in a match is spent hitting the ball — the sport is mostly a few seconds of sprinting, then a pause, repeated for hours.
- TriathlonThe legs coming off the bike have spent an hour pushing without ever absorbing an impact, and running asks them to do the opposite immediately.
- Ultimate FrisbeeA disc stays in the air far longer than a ball, and that flight time is what turns every throw into a long sprint.
- Vertical JumpThe dip before you jump is not a wind-up — the speed of it is most of what decides how high you go.
- VolleyballEvery jump has to be landed, and the landings add up faster than the jumps do.
- WakeboardingThe rope pulls forwards while gravity pulls down, so the body is being loaded from two directions at once for the whole ride.
- Water PoloThere is no floor to push against, so every throw has to be launched from a platform the legs are building out of moving water.
- Water SkiingThe muscles never shorten or lengthen much — they simply hold, which is why the burn arrives without any obvious movement.
- WrestlingAlmost nothing in a wrestling match moves fast; most of it is two people producing near-maximal force while barely moving at all.
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