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Reactive Strength 
Index

Reactive strength index (RSI) 
is derived from ground 
contact time and jump height. 
It is a composite score used 
to measure the level of 
“reactive strength”. It was 
developed at the Australian 
Institute of Sport and more 
information can be easily 
found on the web. 

Summary of Contents for gFlight

Page 1: ...User Manual Rev 180306 ...

Page 2: ...he display component This component has an on off switch the display screen for jump metrics and a sensor The component on the right of the two shown in the picture simply acts as a sensor As you will see in the upcoming pages the sensors are quite small and proper alignment is key for best use gFlight ...

Page 3: ...Powering On The display side Figure 1 is turned on by pressing the red button The other side Figure 2 is turned on by pressing the red button They should click and be locked on Figure 1 Figure 2 ...

Page 4: ...to jump testing When the sensors are properly lined up simply breaking the beam tapping your hand feet or taking a small hop will register and the metrics will appear on the gFlight display Set the units 24 36 inches apart Test as outlined above ...

Page 5: ...Foot Placement Line up your pinky toes with the sensors You may want to take a small hop before you take your first jump This will test to make sure the sensors are lined up properly ...

Page 6: ...nding Landings need to be consistent If you land outside of the sensors the jump will not register We have found that a couple of practice jumps or adding a visual landing marker can help limit the error ...

Page 7: ...Metrics The G Flight will provide you with four metrics IN inches CM centimeters GCT ground contact time MS RSI Product of Height v GCT Each will be elaborated on in the following pages ...

Page 8: ...Jump Height in Time in air is measured in milliseconds This metric is used to help calculate jump height which is then displayed as INCHES ...

Page 9: ...Jump Height cm Jump height is measured in centimeters Jump height is derived from the time in air metric ms It is most accurate when landings are takeoffs are consistent ...

Page 10: ...Ground Contact Time Ground contact time GCT The length of time one s feet are on the ground preceding the jump Typically only useful for continuous movements i e depth jumps hops or bounds ...

Page 11: ...th index RSI is derived from ground contact time and jump height It is a composite score used to measure the level of reactive strength It was developed at the Australian Institute of Sport and more information can be easily found on the web ...

Page 12: ...roperly sensors facing each other to get the best range 24 to 36 depending on ambient light The gFlight metrics will be best if landings are takeoffs are controlled The gFlight does not save data The gFlight needs 6AA batteries 3 in each side to function The gFlight s sensors need to be free of obstructions ...

Page 13: ...on it slam it drop a weight on it dunk it in water take it apart blow it up launch it into space we do not cover that We will take back any unit that fails to function so long as there are no visible signs of any of the above Just email us at sales exsurgo us and we will go through the process Accidents happen and we understand that but the gFlight is in a highly volatile environment and will be s...

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