A split summary message aggregates all the splits of a given type in an activity. For a ski day, one summary gives the totals of all the runs and another one of all the lifts.
messageIndexStringIndex of the message among the messages of the same kind in the file, starting at 0. Other messages use it to reference this one.
Moment the message refers to, in UTC. FIT stores it as seconds since the FIT epoch (December 31, 1989, 00:00:00 UTC); decoders usually expose it as a regular date.
splitTypeEnumKind of splits summarized by the message.
transitionascentSplitdescentSplitintervalActiveintervalRestintervalWarmupintervalCooldownintervalRecoveryintervalOtherclimbActiveclimbRestsurfActiverunActiverunRestworkoutRoundrwdRunrwdWalkwindsurfActiverwdStandskiLiftSplitskiRunSplitsportEnumMain sport, such as running, cycling, swimming, hiking or training.
allrunningtransitiongenericcyclingfitnessEquipmentswimmingbasketballsoccertennisamericanFootballtrainingwalkingcrossCountrySkiingalpineSkiingsnowboardingrowingmountaineeringhikingmultisportpaddlingflyingeBikingmotorcyclingboatingdrivinggolfhangGlidinghorsebackRidinghuntingfishinginlineSkatingrockClimbingsailingiceSkatingskyDivingsnowshoeingsnowmobilingstandUpPaddleboardingsurfingwakeboardingwaterSkiingkayakingraftingwindsurfingkitesurfingtacticaljumpmasterboxingfloorClimbingbaseballdivingshootingwinterSportgrindinghiitvideoGamingracketwheelchairPushWalkwheelchairPushRunmeditationparaSportdiscGolfteamSportcricketrugbyhockeylacrossevolleyballwaterTubingwakesurfingwaterSportarcherymixedMartialArtsmotorSportssnorkelingdancejumpRopepoolApneamobilitygeocachingcanoeingsubSportEnumRefinement of the sport, such as trail, treadmill or track for running, road, mountain or indoor for cycling, lapSwimming or openWater for swimming.
matchmapplatformalltracknavigatefieldgenerichiittreadmillstreettrailspinindoorCyclingroadmountaindownhillrecumbentcyclocrosshandCyclingtrackCyclingindoorRowingellipticalstairClimbinglapSwimmingopenWaterflexibilityTrainingstrengthTrainingwarmUpexercisechallengeindoorSkiingcardioTrainingindoorWalkingeBikeFitnessbmxcasualWalkingspeedWalkingbikeToRunTransitionrunToBikeTransitionswimToBikeTransitionatvmotocrossbackcountryresortrcDronewingsuitwhitewaterskateSkiingyogapilatesindoorRunninggravelCyclingeBikeMountaincommutingmixedSurfacetrackMesingleGasDivingmultiGasDivinggaugeDivingapneaDivingapneaHuntingvirtualActivityobstaclebreathingccrDivingsailRaceexpeditionultraindoorClimbingboulderingindoorGrindinghuntingWithDogsamrapemomtabataesporttriathlonduathlonbrickswimRunadventureRacetruckerWorkoutpickleballpadelindoorWheelchairWalkindoorWheelchairRunindoorHandCyclingiceultimatesquashbadmintonracquetballtableTennisoverlandtrollingMotorflyCanopyflyParaglideflyParamotorflyPressurizedflyNavigateflyTimerflyAltimeterflyWxflyVfrflyIfrdynamicApneaenduroruckingrallypoolTriathloneBikeEnduronumSplitsUint16Number of splits of this type.
Duration during which the timer was running, pauses excluded. This is the time usually displayed as the duration.
Total distance covered.
Average speed: total distance divided by timer time.
Maximum speed reached.
Cumulated elevation gain.
Cumulated elevation loss.
Average heart rate, pauses excluded.
Maximum heart rate reached.
Average vertical speed.
Total energy expenditure.
Average cadence: revolutions per minute for cycling, steps per minute for running (depending on the sport).
Average running cadence, in strides per minute.
Average swimming cadence, in strokes per minute.
Average cadence for paddle sports (kayak, SUP, rowing), in strokes per minute.
Average number of wheelchair pushes per minute.
Maximum cadence reached.
Maximum running cadence, in strides per minute.
Maximum swimming cadence, in strokes per minute.
Maximum cadence for paddle sports, in strokes per minute.
Maximum number of wheelchair pushes per minute.
Total number of cycles: pedal revolutions, strides or strokes depending on the sport.
Total number of strides.
Total number of strokes (swimming, paddling, rowing).
Total number of repetitions.
Total number of wheelchair pushes.
Average ambient temperature measured by the device.
Highest ambient temperature measured by the device.
Lowest ambient temperature measured by the device.
Average vertical oscillation: how much the torso moves up and down at each step.
Average vertical ratio: vertical oscillation divided by step length. The lower, the more efficient.
Average ground contact time: how long each foot stays on the ground at each step.
Average ground contact time balance between left and right foot.
Average step length.
Average power output.
Maximum power output.
Normalized power (NP): an estimate of the power that could have been sustained for the same physiological cost if the effort had been perfectly steady.
leftRightBalanceEnumPower contribution of the right leg, when the right bit is set, as a percentage of the total. The left leg makes up the rest.
rightmaskTotal time spent standing on the pedals.
Average platform center offset of the left foot: how far from the center of the pedal the force is applied.
Average platform center offset of the right foot: how far from the center of the pedal the force is applied.
Average start and end angles of the left pedal stroke portion producing positive power.
Average start and end angles of the left pedal stroke portion producing peak power.
Average start and end angles of the right pedal stroke portion producing positive power.
Average start and end angles of the right pedal stroke portion producing peak power.
Average power for each rider position (seated, standing).
Maximum power for each rider position (seated, standing).
Average torque effectiveness of the left leg: share of the pedal stroke producing positive power.
Average torque effectiveness of the right leg: share of the pedal stroke producing positive power.
Average pedal smoothness of the left leg: how evenly power is applied across the stroke.
Average pedal smoothness of the right leg: how evenly power is applied across the stroke.
Average pedal smoothness of both legs combined, for single-sided power meters.
Average flow score: how smoothly the rider kept their momentum.
Grit score: how difficult the trail was, based on its slopes and sharp turns. The higher, the harder.
swimStrokeEnumSwimming stroke: freestyle, backstroke, breaststroke, butterfly, drill, mixed or IM.
freestylebackstrokebreaststrokebutterflydrillmixedimimByRoundrimoNumber of pool lengths actually swum.
avgSwolfUint16Average SWOLF (swim golf) score: strokes plus seconds needed to swim a length. The lower, the more efficient.
Average distance covered at each stroke.
Average number of strokes per pool length.
Average elevation gain per split.
Elevation gain of the split with the most climbing.
Grading scale used for the climbing grades: French, YDS, UIAA, Font, V-scale (Vermin), British, Ewbank, Brazilian, Saxon or Dankyu.
fontfrenchydsuiaabritishAdjectivalbritishTechnicalewbankbraziliansaxonvermindankyuydsPmclimbMaxGradeValueUint32Hardest grade climbed, as a raw value to interpret according to climbGradingScale.
climbMaxGradeYdsEnumHardest grade climbed, on the Yosemite Decimal System (5.9, 5.10a…).
515253545556575859510510a510b510c510d511511a511b511c511d512512a512b512c512d513513a513b513c513d514514a514b514c514d515515a515b515c515d51Minus51Plus52Minus52Plus53Minus53Plus54Minus54Plus55Minus55Plus56Minus56Plus57Minus57Plus58Minus58Plus59Minus59Plus510Minus510Plus511Minus511Plus512Minus512Plus513Minus513Plus514Minus514Plus515Minus515PlusHardest grade climbed, on the UIAA scale.
xiiIiIIiVMinusiViVPlusvMinusvvPlusvIMinusvIvIPlusvIIMinusvIIvIIPlusvIIIMinusvIIIvIIIPlusiXMinusiXiXPlusxMinusxPlusxIMinusxIxIPlusxIIMinusHardest grade climbed, on the French sport climbing scale (5c, 6a+, 7b…).
1234a4b4c5a5b5c6a6aPlus6b6bPlus6c6cPlus7a7aPlus7b7bPlus7c7cPlus8a8aPlus8b8bPlus8c8cPlus9a9aPlus9bHardest grade climbed, on the British adjectival scale (D, VD, S, HS, VS, HVS, E1…).
dsmhDvDmShSmVSvShVSe1e2e3e4e5e6e7e8e9e10e11Hardest grade climbed, on the British technical scale (4a, 5c, 6b…).
1234a4b4c5a5b5c6a6b6c7a7b7cHardest grade climbed, on the Ewbank scale used in Australia, New Zealand and South Africa.
4567891011121314151617181920212223242526272829303132333435363738Hardest grade climbed, on the Brazilian scale.
2345a5b5c6a6b6c7a7b7c8a8b8c9a9b3c9c10a10b10c11a11b11c12a12bHardest grade climbed, on the Saxon scale.
iiIiIIiVvvIvIIAvIIBvIICvIIIAvIIIBvIIICiXAiXBiXCxAxBxCxIAxIBxICxIIAxIIBxIICHardest grade climbed, on the V-scale (Vermin) used for bouldering.
vbv0v1v2v3v4v5v6v7v8v9v10v11v12v13v14v15v16v17Hardest grade climbed, on the Fontainebleau bouldering scale.
123456a6aPlus6b6bPlus6c6cPlus7a7aPlus7b7bPlus7c7cPlus8a8aPlus8b8bPlus8c8cPlus9a4Plus5PlusHardest grade climbed, on the Japanese Dankyu scale.
7Kyuu6Kyuu5Kyuu4Kyuu3Kyuu2Kyuu1Kyuu1Dan2Dan3Dan4Dan5DannumFallsUint16Total number of falls, for indoor climbing.
numClimbsAttemptedUint16Number of climbing routes attempted.
numClimbsCompletedUint16Number of climbing routes completed.
Distance of the longest split.
Calories burned by the metabolism at rest during the period (basal metabolic rate), included in the total.
Total active time over all the splits of the type.
Fractional part of totalAscent, to add to it for a more precise value.
Fractional part of totalDescent, to add to it for a more precise value.
Fractional part of avgAscent.
Fractional part of maxAscent.
Average speed adjusted for the slope: the equivalent speed on flat ground for the same effort.
avgStressUint16Average stress level.
Time spent actually moving, excluding the time stopped even when the timer was running.
startTimeDateTimeMoment the period described by the message started.
Minimum heart rate recorded.
Average ground contact time, as a percentage of the step duration.
Timer time of the longest split.
mesgNumStringGlobal message number identifying the kind of message. Decoders use it to know which profile to apply to the data.