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VX Sport Metric Glossary

 

By Overall Stats

 

Speed and Distance Metrics can be viewed in either metric or imperial units. These can be changed in the Settings menu in VX View.

 

Activity Load 2D/3D (ActivityLoad 2D/3D)

This metric is available as either 2D or 3D. It is a measure of net cumulative motion calculated for the X, Y & Z accelerometers. The value of AL2D and AL3D will typically be between 200 and 500, depending on the length of the session recorded and the intensity. It is available for both indoor and outdoor activities and is proportional to athletic cumulative physical effort. The AL3D metric will suit most field-based sports where significant running or jumping is involved. For the AL2D metric only the X&Y axes are used, and this version is more relevant to athletic activities that do not have significant running.

 

Activity Load 2D/3D Rate (ActivityLoad 2D/3D Rate)

The rate that gives us activity load per unit of time.

 

Athlete Load (Athlete Load)

Calculated by the relationship between Duration Total, Distance Total, High Intensity Distance and Total Sprints. Normative data gathered from elite & College Soccer (Football). An Athlete Load of 80 points would be considered a match load, 70 would be less and 90 would be more.

 

Avg HR (HR Avg Total)

Calculates the Average HR of the session. 

 

Avg HR% (% AvgHR)

Compares an athlete's Average HR of a session to their Average HR Benchmark. Returns a percentage value such that if % AvgHR is greater than 100% then the athlete has worked at a higher intensity than "normal" (and vice versa). 

 

Avg Speed (Speed Avg)

Calculates the Average Speed of the session. Can be changed dependent on Trim periods selected. For example, if a player completed 9km during a 90min soccer game, their Average Speed for that game would be 6 km/hr.

 

Avg Speed% (% AvgSpeed)

Compares an athlete's Average Speed of a session to their Average Speed Benchmark. Returns a percentage value such that if % AvgSpeed is greater than 100% then the athlete has worked at a higher intensity than "normal" (and vice versa). 

 

Beat to Beat Standard Deviation (HR SD)

The standard deviation calculated between inter-beat intervals (RR values).

 

Body Impacts (num)

The number of Impacts within the session. 

 

Distance (Distance Total)

Total Distance of all the data collected. Can be changed dependent on Trim periods selected.

 

Distance Rate (Distance Rate)

The rate that gives us distance travelled per unit of time.

 

Duration (Duration Total)

Total Duration of the data collected. Dependent on Trim periods selected.

 

Energy Consumption (Energy Consumption Total)

Estimates the amount of energy (calories) an athlete consumed in a session. Dependent on trim selection. Heart rate monitors must be worn as HR is used in the calculation. 

 

Equivalent Distance Index (Equivalent Distance Index)

Percentage of player energy produced that is devoted to accelerating/decelerating (as compared to constant speed jogging). Optimized for soccer (football) players. Range is usually between 0 -20%. At 0 or low % figure indicates little dynamic movement compared with walking.

 

Heart Rate Variability RMSSD (HR RMSSD)

The root mean square of successive differences between normal heartbeats, shown in milliseconds (ms). 

 

Hi Intensity Acceleration (Hi Int Acceleration)

The total amount of accelerations that are above the High Intensity Acceleration Benchmark, set as an absolute number (m/s/s).

 

Hi Intensity Acceleration Rate (Hi-Int Acceleration Rate)

The rate that gives us hi-int accelerations completed per unit of time. 

 

Hi Intensity Acceleration % (Hi-Int Acceleration %)

The percentage of High intensity accelerations (See Hi Intensity Accelerations) compared to total accelerations within a session.

 

Hi Intensity Deceleration (Hi Int Deceleration)

The total amount of deceleration's that are above the High Intensity Deceleration Benchmark, set as an absolute number (m/s/s).

 

Hi Intensity Deceleration Rate (Hi-Int Deceleration Rate)

The rate that gives us hi-int decelerations completed per unit of time. 

 

Hi Intensity Deceleration % (Hi-Int Deceleration %)

The percentage of High intensity decelerations (See Hi Intensity Decelerations) compared to total decelerations within a session.

 

Hi Intensity Jumps (Hi-Int Jumps)

Total number of jumps with a max jump height above the High Intensity Jump Benchmark, set as an absolute number in athlete profile.

 

Hi Intensity Jump Rate (Hi-Int Jump Rate)

The rate that gives us hi-int jumps completed per unit of time. 

 

Hi Intensity Jump % (Hi-int Jump %)

The percentage of High intensity jumps (See Hi Intensity Jumps) compared to total jumps within a session.

 

Hi Intensity HR Distance (Distance HR Hi-Inten)

Total distance that is covered when the Heart Rate is above the High Intensity Heart Rate Benchmark, set as an absolute number inside the athlete profile.

 

Hi Intensity HR Duration (Duration HR Hi-Inten)

Total duration that the Heart Rate spends above the High Intensity Heart Rate Benchmark, set as an absolute number in athlete profile.

 

Hi Intensity HR Sprint (Sprints HR Hi-Inten)

Total number of sprints performed above the high intensity heart rate benchmark. Please see High Intensity Heart rate benchmark. 

 

Hi Intensity Speed Density (Hi-Int Speed Density)

Arbitrary metric for use in distinguishing between HSR volume (distance covered) and HSR intensity (m/min) to provide an enhanced degree of specificity for conditioning sessions. Calculated as: (number of hi-int speed efforts/hi-int speed distance)*100. https://sportperfsci.com/wp-content/uploads/2018/08/SPSR38_Tierney-al_180711_final.pdf

 

Hi Intensity Speed Distance (Distance Speed Hi-Inten)

Total distance that is covered above the specified High Intensity speed threshold. Can be changed in Global default settings and/or Individual athlete benchmarks as an absolute number.

 

Hi Intensity Speed Distance % (Hi Intensity Distance %)

The percentage of the High intensity distance (See High Intensity Distance) compared to total distance within a session.

 

Hi Intensity Speed Duration (Duration Speed Hi-Inten)

Total duration that is gathered from above the High Intensity Speed Benchmark, set as an absolute number in athlete profile.

 

Hi Intensity Speed Efforts (Hi-Int Speed Efforts)

Total amount of sprints that are above the High Intensity Speed Benchmark, set as an absolute number. See Sprint count for definition around sprint calculation. 

 

Hi Intensity Sprint (Sprints Hi-Inten)

Total amount of sprints that are above the High Intensity Sprint Benchmark, set as an absolute number. See Sprint count for definition around sprint calculation. 

 

Hi Intensity Sprint Rate (Hi-Int Sprint Rate)

The rate that gives us hi-int sprints completed per unit of time

 

Hi Intensity Sprint % (Hi-Int Sprint %)

The percentage of High intensity sprints (See Hi Intensity Sprints) compared to total sprints within a session.

 

Hi Intensity Sprint Distance (Distance Sprint Hi-Intensity)

Total distance that is covered within a high intensity "sprint" effort, where the max speed reached in the sprint is above a specified High Intensity threshold. Can be changed in Global default settings and/or Individual athlete benchmarks as an absolute number. See Sprint count for definition around sprint calculation.

 

Hi Intensity Sprint Distance Rate (Distance Rate Sprint Hi-Intensity)

Distance rate above the specified High Intensity Sprint threshold.

 

Hi Intensity Sprint Distance % (HI Sprint Distance %)

The percentage of High intensity sprint distance (See Hi Intensity Sprint Distance) compared to total distance within a session.

 

High Intensity Effort Rate (HIE Rate)

The rate that gives us HIE completed per unit of time. I.e., High Intensity Effort/duration.

 

High Intensity Efforts (Hi Intensity Efforts)

The total number of efforts reported across five specific metrics (Hi-int Sprints, Hi-int Accel, Hi-int Decel, Body impacts & Jumps).

 

HR Duration (HR Duration Total)

Total duration of data collected which begins when GPS locks and heart rate is detected.

 

Impact Rate (rate/min)

The rate that gives us impacts completed per unit of time. 

 

Jump Count (num)

The number of jumps recorded within a session. Jumps can be determined by vertical accelerometer peak of equivalent to 11cm, a 500ms gap between consecutive jumps and a minimum jump time of 300ms.

 

Jump Rate (Jump Rate (Jumps/min))

The rate that gives us jumps completed per unit of time. 

 

Max Core Temp (Max Core Temp)

Maximum estimated internal body temperature in a session as calculated by the Kalman filter Model using Heart Rate as the parameter.

 

Max HR (HR Max Total)

Returns the maximum HR that the athlete reached during the session. Can be changed dependent on Trim periods selected.

 

Max HR% (% MaxHR)

Compares the Max HR of the session to the athlete's Maximum Heart Rate Benchmark. Returns a percentage value that represents how close the athlete got to their maximum heart rate.

 

Max Jump Height (Max Jump Height)

The max height in centimetres that was recorded within the session. This can be dependent on trim selection.

 

Max Speed (Speed Max)

Returns the maximum instantaneous speed that the athlete reached during the session. Note: if an athlete records a speed above their max speed benchmark, there is a 5% buffer above this in which the software will allow the new max speed to register.

 

Max Speed% (% MaxSpeed)

Compares the Speed Max that an athlete attained during a session to their Maximum Sprint Speed Benchmark (MSS). Returns a percentage value which shows what percentage of their maximum speed they reached. 

 

Metabolic ED (Metabolic EquivalentDistance)

This figure computes the total distance (always in excess of actual distance) a player would have covered if the extra energy cost due to their acceleration/deceleration's were converted to additional metres.

 

Metabolic Energy Cost (J/Kg/M) (Metabolic EnergyCost (J/Kg/m))

This indicates how much energy a meter of covered distance "cost" the athlete.

 

Metabolic EnergyCost (Metabolic EnergyCost)

Estimates the amount of energy (calories) an athlete consumed in a session. Heart rate strap must be worn as HR is used in the calculation.

 

Metabolic Power Peak (Metabolic PowerPeak)

A simplified formula produces a power calculation as a rate of energy consumption.

 

Min Core Temp (Min Core Temp)

Minimum estimated internal body temperature in a session as calculated by the Kalman filter Model using Heart Rate as the parameter.

 

Speed Duration (Speed Duration Total)

Total duration of data collected beginning when GPS locks.

 

Sprint Count (Sprints Total)

Total amount of Sprints that fall in the sprint equation. Sprints can start at any speed but requires an increase of 2.5km/h within a second. An athlete must reach 10km/h. The sprint ends when an athlete slows to 75% of the maximum speed that they reached in the sprint.

 

Very-High Speed Distance (Distance Speed Very-High)

Total distance that is covered at a specified High Intensity threshold. Can be changed in Global default settings and/or Individual athlete benchmarks as an absolute number.

 

Very-High Speed Distance % (Very-High Speed Distance %)

The percentage of Very-High intensity speed distance (See Very-High Speed Distance) compared to total distance within a session.

 

VO2 Max (VO2 Max)

A value that represents the maximum rate at which an athlete can consume oxygen. Each athlete's relative VO2Max can be entered/edited in the Athlete Details page in their profile. If you are unsure of what an athlete's VO2 Max is, it can be estimated by selecting activity level the athlete would be per week. Please note that VO2 Max values are involved in calculating Energy Consumption, therefore ensure that your athletes VO2 Max values are accurate if you're interested in the Energy Consumption metric.

 

Work Recovery Ratio (Work Recovery Ratio)

Ratio comparing the total duration of time that the athlete's heart rate is rising with that when it is dropping. The amount of time an athlete is working vs recovering.

 

 

By Speed Zones

 

Avg HR (HR Avg Speed Zone)

Average HR covered in each zone. Zones (%) can be individualised in the settings tab under the HR band. Absolute values (bpm) can be manipulated under the athletes’ benchmark settings (MHR). 

 

Avg HR Variability (HR var Avg Speed Zone (%))

Measures the average variation in the time between heart beats then divides that time by the average time between heart beats for that period within speed zones.

 

Avg Metabolic Rate (Mbolic Rate Avg Speed Zone (watts/kg))

Measures the average instantaneous power output of the athlete for a given period in the selected speed zone. Usually observed to sit around 3 to 6 Watts/kg and sustained for a period of time (Usually ranging from several minutes up to an hour).

 

Avg Speed (Speed Avg Speed Zone)

Average speed covered in each zone. Zones (%) can be individualised in the settings tab under the speed band and in the athletes’ benchmark settings (MSS).

 

Distance (Distance Speed Zone)

Distance covered in each speed zone. Zones (%) can be individualised in the settings tab under the speed band and the athletes benchmark settings (MSS).

 

Distance Rate (Distance Rate Speed Zone)

Distance Rate covered in each speed zone.

 

Duration (Duration Speed Zone)

Total duration spent in each speed zone.

 

MAS Distance (MAS Distance)

Total distance that is covered above the MAS benchmark, set as an absolute number.

 

MAS Duration (MAS Duration (min:sec))

Total duration that is covered above the MAS benchmark, set as an absolute number.

 

Max HR (HR Max Speed Zone)

Max HR covered in each zone. Zones (%) can be individualised in the settings tab under the HR band. Absolute values (bpm) can be manipulated under the athletes’ benchmark settings (MHR). 

 

Max Speed (Speed Max Speed Zone)

Max speed covered in each zone. Zones (%) can be individualised in the settings tab under the speed band and in the athletes’ benchmark settings (MSS).

 

Peak Metabolic Rate (Mbolic Rate Peak Speed Zone (watts/kg))

A measurement of the peak instantaneous power output of the athlete in each zone. Instantaneous (peak) values are observed around the 500 Watt/kg. This is realistic – top international cyclist can produce averages >400W output continuously.

 

Sprint Frequency (Sprints Speed Zone)

Total number of sprints completed in each speed zone.

 

 

 

By Heart Rate Zones

 

 Avg HR (HR Avg HR Zone)

Average HR covered in each HR zone. Zones (%) can be set in the settings tab under the HR band.

 

Avg HR Variability (HR var Avg HR Zone)

Measures the average variation in the time between heart beats then divides that time by the average time between heart beats for that period within heart rate zones.

 

Avg Metabolic Rate (M bolic Rate Avg HR Zone (watts/kg))

Measures the average instantaneous power output of the athlete for a given period in the selected Heart Rate zone. Usually observed to sit around 3 to 6 Watts/kg and sustained for a period of time (Usually ranging from several minutes up to an hour).

 

Avg Speed (Speed Avg HR Zone)

Average speed covered in each HR zone. Zones (%) can be set in the settings tab under the HR band.

 

Distance (Distance HR Zone)

Distance covered in each HR zone. Zones (%) can be individualised in the settings tab under the HR band. Absolute values (bpm) can be manipulated under the athletes’ benchmark settings (Max Heart Rate).

Distance Rate (Distance Rate HR Zone)

Distance rate covered in each HR zone.

Duration (Duration HR Zone (min:sec))

Total duration spent in each HR zone.

 

Energy Consumption (EC HR Zone)

Estimates the amount of energy (calories) an athlete consumed within each HR zone. Heart rate strap must be worn as HR is used in the calculation.

 

Max HR (HR Max HR Zone)

Max HR covered in each HR zone. Zones (%) can be set in the settings tab under the HR band.

 

Max Speed (Speed Max HR Zone)

Max speed covered in each HR zone. Zones (%) can be set in the settings tab under the HR band.

 

Peak Metabolic Rate (M bolic Rate Peak HR Zone (watts/kg))

A measurement of the peak instantaneous power output of the athlete in each Heart Rate zone. Instantaneous (peak) values are observed around the 500 Watt/kg. This is realistic – top international cyclist can produce averages >400W output continuously.

 

Sprint Frequency (Sprints HR Zone)

Total number of sprints completed in each HR zone.

 

TRIMP (TRIMP)

Training Impulse derived from Heart Rate and Duration from a session. VX Sport calculates an overall TRIMP score but also a TRIMP score in all zone - recognising that each zone represents a significant increase in training effort.

 

 

By Acceleration Zones

 

Avg Distance (Distance Avg Acceleration Zone)

Average distance covered within each acceleration zone.

 

Avg Duration (Duration Avg Acceleration Zone)

Average duration spent in each acceleration zone.

 

Frequency (Accelerations Acceleration Zone)

Total number of accelerations within each acceleration zone. Zones can be individualised in settings under the acceleration band. Absolute values can be manipulated under the athletes’ benchmark settings (Max Acceleration).

 

Max Acceleration (Acceleration Max Zone)

Maximum acceleration achieved in each acceleration zone. Zones (%) can be set in the settings tab under the acceleration band.

 

Max Acceleration % (Acceleration Max % Zone)

Maximum acceleration % achieved in each acceleration zone. Zones (%) can be set in the settings tab under the acceleration band.

 

Max Distance (Distance Max Acceleration Zone)

Maximum distance covered within each acceleration zone.

 

Max Duration (Duration Max Acceleration Zone)

Maximum duration spent in each acceleration zone.

 

Total Distance (Distance Total Acceleration Zone)

Total distance covered in each acceleration zone.

 

Total Duration (Duration Total Acceleration Zone)

Total duration spent accelerating. Sum of all five zones.

 

 

 

By Deceleration Zones

 

Avg Distance (Distance Avg Deceleration Zone)

Average distance covered within each deceleration zone.

 

Avg Duration (Duration Avg Deceleration Zone)

Average duration spent in each deceleration zone.

 

Frequency (Decelerations Deceleration Zone)

Total number of deceleration's completed in each deceleration zone. Zones can be individualised in settings under the acceleration band. Absolute values can be manipulated under the athletes’ benchmark settings (Max Deceleration). 

 

Max Distance (Distance Max Deceleration Zone)

Maximum distance covered within each deceleration zone.

 

Max Duration (Duration Max Deceleration Zone)

Maximum duration spent in each deceleration zone.

 

Total Distance (Distance Total Deceleration Zone)

Total distance covered in each deceleration zone.

 

Total Duration (Duration Total Acceleration Zone)

Total duration spent accelerating. Sum of all five zones.

 

 

 

By Sprint Zones

 

Avg Distance (Distance Avg Sprint Zone)

Average distance covered within each sprint zone.

 

Avg Duration (Duration Avg Sprint Zone)

Average duration spent in each sprint zone.

 

Frequency (Sprints Sprint Zone)

Total number of sprints within each sprint zone. Zones can be individualised in settings under the sprint band and in the athlete’s benchmark settings.

 

High Metabolic Power Distance (Distance High Met Power)

Distance covered above the high metabolic power distance benchmark. Can be changed in the individual athlete benchmarks as an absolute number.

 

Max Distance (Distance Max Sprint Zone)

Maximum distance covered within each sprint zone.

 

Max Duration (Duration Max Sprint Zone)

Maximum duration spent in each sprint zone.

 

 

Metabolic Power Metrics

The aim of our metabolic power measures is to provide an overall ‘estimate’ of total internal energy expenditure during a performance. All VX Sport metabolic formulae are related to published sports science research papers. For more information, please contact support@vxsport.com

 

High Metabolic Power Distance Rate (Distance Rate High Met Power)

Distance rate covered above the high metabolic power distance benchmark.

 

Total Distance (Distance Total Sprint Zone)

Total distance covered in each sprint zone.

 

Total Duration (Duration Total Sprint Zone)

Total duration spent sprinting. Sum of all five zones.

 

Very-High Metabolic Power Distance (Distance Very-High Met Power)

Distance covered above the very-high metabolic power distance benchmark. Can be changed in the individual athlete benchmarks as an absolute number.

 

Very-High Metabolic Power Distance Rate (Distance Rate Very-High Met Power)

Distance rate covered above the very-high metabolic power distance benchmark.

 

 

By Metabolic Power Zones

 

Distance (Distance Met Power Zone)

Distance covered in each metabolic power zone. Zones (%) can be set in the settings tab under the metabolic power band.

 

Distance Rate (Distance Rate Met Power Zone)

Distance rate covered in each metabolic power zone.

 

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