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Sports Glossary
Learn the language of your game — answer-first definitions across every SwingVantage sport, each with a real example. Free to explore.
All sportsGolfTennisPickleballPadelBaseballSlow-Pitch SoftballFast-Pitch SoftballCricket Analysis Concepts
1191 terms
- In-to-OutIntermediateIn-to-out describes a clubhead travelling rightward across the target line as it meets the ball, for a right-hander. It is the delivery direction underneath draws, hooks and pushes.Golf
- Induced Vertical Break (IVB)ProInduced vertical break is the vertical movement a pitch achieves purely from spin, measured against a hypothetical spinless ball — isolating the Magnus effect from gravity.Baseball
- Infield DepthIntermediateInfield depth is how far the infielders play from home plate. This means "in" (shaded forward to cut off a run) or "back" (standard depth to maximize range on ground balls and line drives).Slow-Pitch Softball
- Innings Limit (Youth)BeginnerAn innings limit is a cap on the total number of innings a young pitcher is permitted or recommended to throw across a season or year, intended to manage cumulative throwing workload beyond any single game's pitch count.Baseball
- Inside Pitch ApproachIntermediateThe inside pitch approach is the technique for hitting a ball on the inner third of the plate. This means pulling the hands in, getting the barrel through early, and driving the ball to the pull side.Fast-Pitch Softball
- Inside vs Outside PitchBeginnerAn inside pitch crosses the inner half of the plate, nearest the hitter; an outside pitch crosses the outer half, away from the hitter. Each requires a different contact point and field direction.Slow-Pitch Softball
- Inside-Out ForehandIntermediateAn inside-out forehand is played by running around a ball that arrives on the backhand side and redirecting it with the forehand to the opponent's backhand corner.Tennis
- Instant EstimateBeginnerAn Instant Estimate is a fast, heuristic-only analysis result available immediately after upload. This means clearly labeled as an estimate derived from rules, before any AI-enhanced processing completes.Analysis Concepts
- Interlocking GripBeginnerThe interlocking grip links the lead hand's index finger with the trail hand's pinky finger, weaving the two hands together. This means a popular choice for players with smaller or weaker hands, including many tour pro players.Golf
- Interpreted ValueIntermediateAn interpreted value is a judgment or label that emerged from AI reasoning applied to raw data. This means such as 'likely timing issue' or 'probable hip stall'. Instead of from a direct measurement or a deterministic rule.Analysis Concepts
- Iron Contact PointIntermediateIron contact point is the specific spot on the clubface where the ball is struck. This determines ball speed, spin consistency. The direction of any gear-effect curve, independent of swing path and face angle.Golf
- ISA League FormatBeginnerISA (Independent Softball Association) is one of several regional or specialty sanctioning bodies for slow-pitch softball, maintaining its own bat-certification standard and rule variations that a team must confirm separately from USSSA or USA Softball requirements.Slow-Pitch Softball
- JudgmentIntermediateJudgment in cricket batting is the ability to quickly decide which deliveries to play and which to leave, choosing the right shot for each ball bowled.Cricket
- Jump (Stolen Base)IntermediateThe jump on a stolen base attempt is how quickly and decisively a runner breaks toward the next base on the pitcher's first movement. This means the single biggest predictor of stolen base success.Baseball
- Kick ServeAdvancedA kick serve combines heavy topspin with side spin to clear the net safely and then bounce high and kick sideways. This makes it the standard high-level second serve. This is because of its margin and awkward bounce.Tennis
- Kick ServeAdvancedA Kick Serve in padel is an underarm serve struck with topspin. As a result, after bouncing in the service box it accelerates and kicks up or to the side. This makes the return more awkward than a flat serve.Padel
- Kick Serve Spin DirectionAdvancedKick serve spin direction refers to the diagonal axis of topspin-sidespin that makes a kick serve jump up and away from the returner after the bounce.Tennis
- Kinematic ChainIntermediateThe kinematic chain is the sequence of body segments. This comes from ground to tip. This means through which force and speed are transferred in a swing, with each segment's energy amplifying the next.Analysis Concepts
- Kinematic SequenceProThe kinematic sequence is the order in which body segments accelerate and decelerate during the downswing: pelvis → torso → lead arm → clubhead. Each segment slingshots the next for maximum speed.Golf
- Kinetic ChainProThe kinetic chain is the linked sequence of body segments. This means feet, knees, hips, torso, shoulders, arms, wrists, club. This means where each segment transfers and amplifies energy to the next.Golf
- Kinetic ChainIntermediateThe kinetic chain in tennis is the sequential transfer of force from the ground up through the legs, hips, torso, shoulder, arm, and racquet, each segment accelerating the next to multiply racquet-head speed.Tennis
- Kinetic Chain BreakdownIntermediateA kinetic chain breakdown happens when the ground-up sequence of leg, hip, torso, and arm rotation is interrupted or skipped. This forces the arm to generate power on its own instead of receiving it from the body.Tennis
- Kitchen (Non-Volley Zone)BeginnerThe kitchen is the 7-foot non-volley zone on each side of the net. You may not hit a volley (a ball out of the air). At the same time, standing in it or touching its line. This means you must let the ball bounce first.Pickleball
- Kitchen Line BattleIntermediateA kitchen line battle is the sustained exchange that happens once both teams have reached the non-volley zone line, combining dinks, speed-ups, and volleys until one side forces an error or opening.Pickleball
- Kitchen Line PositionBeginnerKitchen line position refers to standing as close to the non-volley zone line as legally possible. This maximizes net coverage and offensive angle. At the same time, minimizing the court area opponents can attack.Pickleball
- Knee FlexBeginnerKnee flex at address is the slight bend in the knees that creates an athletic, ready posture. This means enough to feel springy and stable, not. As a result, much that it restricts hip rotation.Golf
- Knock-Down ShotIntermediateA knock-down shot is an approach shot deliberately hit with a lower, more controlled trajectory than normal. This means usually with more club and a shorter, three-quarter swing. This means to fight wind or control distance more precisely.Golf
- Knuckle CurveAdvancedA knuckle curve is a curveball variation gripped with one finger (usually the index) bent and pressed knuckle-first against the ball, instead of laid flat. This produces a tighter spin axis and a later, sharper break.Baseball
- Knuckleball – Fast-PitchAdvancedA fast-pitch knuckleball is thrown with minimal spin. As a result, air turbulence causes the ball to flutter erratically. This makes it nearly impossible to predict. This means for the hitter or the catcher.Fast-Pitch Softball
- LagAdvancedLag is the acute angle between the lead arm and the shaft in the downswing. This means the loaded position that releases into club speed at impact when timed correctly.Golf
- Lag PuttingIntermediateLag putting is the deliberate strategy of prioritizing distance control over making a long putt, aiming to leave a short, stress-free second putt rather than attacking the hole aggressively.Golf
- Landmark TrackingIntermediateLandmark tracking follows the position of each detected body keypoint across consecutive video frames. This creates a time-series trajectory for every joint that enables timing and velocity measurements.Analysis Concepts
- Late Contact (Slow-Pitch)IntermediateLate contact happens when the bat meets the ball behind the ideal contact point. This means closer to or behind the back edge of the plate. This means usually producing weak contact to the opposite field or a foul ball.Slow-Pitch Softball
- Late Contact (Tennis)IntermediateLate contact means the racquet meets the ball behind the ideal contact point. This means usually behind the front hip. This means which robs the shot of pace, direction control, and spin.Tennis
- Late CutAdvancedThe late cut is a delicate batting stroke played to a short, wide ball outside off stump. This uses soft wrists to deflect the ball very fine to third man after it has almost passed the batter.Cricket
- Late LoadIntermediateA late load is starting the weight shift and hand-back motion later than the pitch's flight time allows. This leaves too little time to complete a full, balanced swing before the ball arrives.Slow-Pitch Softball
- Late Split StepIntermediateA late split step lands after the opponent has already struck the ball, meaning the player is still airborne or resettling exactly when they need to be pushing off toward the shot.Tennis
- Late Swing TriggerBeginnerA late swing trigger is a timing mistake in which the hitter starts the swing too far after the ball's release. This most often produces weak contact toward the opposite field or a complete miss on velocity the hitter did not expect.Fast-Pitch Softball
- Lateral ShiftAdvancedA lateral shift is the small move of the hips toward the target at the start of the downswing. It moves the low point forward and sets up the lead-side post, working with hip rotation rather than replacing it.Golf
- Launch AngleIntermediateLaunch angle is the vertical angle, in degrees above horizontal, at which the ball leaves the face. Together with spin it determines how high and far the ball flies.Golf
- Launch Angle (Batting)IntermediateLaunch angle in batting is the vertical angle the ball leaves the bat. Roughly 10–25° produces the hardest, most productive contact.Baseball
- Launch Angle (Slow-Pitch)IntermediateLaunch angle is the vertical angle at which the ball leaves the bat relative to the ground. This means too low produces ground balls, too high produces pop-ups. A moderate range produces line drives and gap shots.Slow-Pitch Softball
- Launch MonitorIntermediateA launch monitor is a device that measures ball and clubhead data at impact. This means ball speed, launch angle, spin rate, and club speed. This means using radar or camera sensors to quantify a shot instead of relying on how it looked.Golf
- LBW (Leg Before Wicket)BeginnerLBW is a mode of dismissal. This means if the ball would have hit the stumps but the batter's pad intercepts it first. This means under specific conditions. This means the umpire can rule them leg before wicket.Cricket
- Lead Arm BendIntermediateLead arm bend is excessive folding of the lead elbow during the backswing. This involves shortening the swing's radius and reducing the width and stored power a fully extended backswing would otherwise create.Golf
- Lead Off BaseBeginnerA lead off base is the distance a baserunner takes from the bag before the pitch. This means maximising lead distance reduces the distance to the next base. At the same time, managing pickoff risk.Baseball
- Lead TimingIntermediateLead timing is when and how far a baserunner leaves the base in anticipation of a pitch being put in play or a steal attempt. This requires coordination with the pitcher's release point.Fast-Pitch Softball
- Lead WristIntermediateThe lead wrist is the wrist of the top hand (left for right-handers). Its position throughout the swing — especially at the top of the backswing and at impact — directly controls clubface angle and low point.Golf
- Left-Side Defense vs SlappersAdvancedLeft-side defense against slappers adjusts the shortstop and third baseman's positioning and first-step reads to cover both a slapped ground ball and a bunt from a left-handed slap hitter.Fast-Pitch Softball
- Leg Drive – PitchingIntermediateLeg drive is the forward force the pivot leg generates against the rubber to launch the pitcher's body toward home plate, forming the base of the kinetic chain the windmill arm circle rides on top of.Fast-Pitch Softball
- Leg Drive on GroundstrokesIntermediateLeg drive is the push off the ground during a groundstroke that initiates the kinetic chain, converting ground reaction force into upward and rotational energy that feeds into the hips, torso, and arm.Tennis
- Leg KickIntermediateA leg kick is a pronounced lift of the front knee during the load, used to build extra rhythm and stored energy before the stride and swing fire. This means a bigger, higher-risk trigger than a toe tap or no-stride approach.Baseball
- Leg-CutterAdvancedThe leg-cutter is a pace bowling variation where the ball is cut off the middle and ring fingers to move towards the leg side off the pitch, acting like a slow leg-break.Cricket
- Leg-SpinIntermediateLeg-spin is a type of spin bowling where a right-arm bowler spins the ball from leg to off (from right to left as seen by the batter). This uses wrist rotation to impart heavy clockwise topspin.Cricket
- Legal DeliveryBeginnerA legal delivery in slow-pitch softball is a pitch that is released underhand with a smooth, continuous motion and arrives within the required arc height. This means typically between 6 and 12 feet. This means over the plate.Slow-Pitch Softball
- Let (Serve Rule)BeginnerA let is called when a serve clips the net cord and still lands in the correct service box. This requires the point to be replayed with no penalty to the server.Tennis
- Let Serve Rule (Pickleball)BeginnerA "let" traditionally means a serve that clips the net and lands in is replayed. This means but current pickleball rules eliminated that provision. As a result, a serve that ticks the net and lands in the correct service court is simply live.Pickleball
- Letting the Ball GoBeginnerLetting the Ball Go means intentionally allowing a fast or deep ball to pass you and rebound off the back glass rather than volleying or striking it in the air. This turns a potential winner into a manageable rebound shot.Padel
- Lie AngleAdvancedLie angle is the angle between the shaft and the ground when the club is soled correctly. A lie angle that is too upright pulls shots left; too flat and they drift right (for a right-hander).Golf
- Lighting ConditionsBeginnerLighting conditions describe how evenly and brightly the subject is illuminated. This means poor lighting is one of the top causes of low-quality video and degraded pose estimation.Analysis Concepts
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