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Cartwright Fitness

Just Jump Mat Jump Height and Timing System

£0.00 Inc. VAT

Out of stock

The Just Jump Mat Plyometric version is an accurate and easy to use jump mat that is being used extensively in, Education, Team and Performance Sport. The compact mini computer instantly shows

  • Jump height,
  • Hang time for one jump,
  • Ground contact time for one jump
  • Average height & flight time for four jumps.
  • Jump 60 times
  • Plyometric mode (Jump On/Off).

Just Jump Mat Plyometric Version

Just Jump mat system is a coaching tool for determining explosive power for the vertical jump test. It also provides accurate timing for straight-line sprint and multi-directional sprint tests.

The mat also has a ‘4-Jump’ mode – this gives the athlete’s average ground time (reaction time), explosive leg power factor (air time/ground time), and jump height.

just jump

The Just Jump system measures in metric units. Just Jump mat measures:

  • Vertical jump height
  • Hangtime
  • Explosive leg power
  • Reaction time
  • Leg power index
  • Jump 60 times
  • Plyometric mode (Jump On/Off)

The system has three modes. The ‘Jump 1 Time’ mode also works as a timing system to measure sprints and agility sequences.

Just Jump Mat Plyometrix Modes

  • Jump 1 Time – Perform a vertical jump, and upon landing, the “Air Time & Jump Height” is shown on the handheld device.
  • Jump 1 Time – (secondary use) The display monitor has a default value of 1.1 secs in this Jump mode. After which it changes to ‘Timer Mode’. You can use this for shuttle drills, with the mat acting as a start and finish point. As the athlete leaves the mat, the timer starts (after 1.1 secs) and stops when the athlete returns to the mat. You can repeat this as soon as the athlete leaves the mat again, as in a repetitive shuttle. The tester will record each successive time value until the test finishes.
  • Sprint Timer – Programme the distance (up to 999 metres) and place the mat at the finish point. The timer starts using the microphone on the device and reacts to a whistle or shouted command. The timer ceases as the athlete crosses the line’ and steps on the mat. The display records the time of the run to the nearest hundredth of a second.
  • Jump 4 Times – This consists of four vertical jumps performed at the greatest height and speed. The handheld device then calculates:
    • Average ground time
    • Average jump height
    • Explosive leg power factor (ELPF – this is the Air Time divided by the Ground Time
  •  In Plyometric Mode, you may select “Land On Mat” or “Land Off Mat”.
    • LAND ON MAT: If this mode is selected, the athlete will jump onto the mat and land back on the mat. The display will read the contact time (left number) with the mat and also will read the vertical (right number). The athlete must stay on the mat until the operator writes down the displayed results. When the athlete steps off the mat, the display will read “JUST JUMP”, the next athlete can now begin his jump.
    • LAND-OFF MAT: If this mode is selected, the athlete will jump onto the mat and land off
      the mat. The display will read contact time with the mat. The displayed time will be to the
      nearest one-hundredth of a second. The next athlete is ready to jump.
  • 60 Jump Mode – Records 60 jumps, then averages heights, contact times and leg power for first and last 15 jumps, in addition to a fatigue factor rating.

Key Features:

  • Portable and easy to use – requires no external power supply, same as the Takei jump mat.
  • Easy to operate – requires no specialist skills to work.
  • Jump 1 Time Mode – measures jump time and calculate ‘hang-time’. You can also use this as a timing device for multi-directional tests.
  • Sprint Timer – measures a range of distances, up to 999 metres.
  • Jump 4 Times Mode measures ground contact time, jump height and explosive leg power.
  • Plyometric Mode
  • 60 Jump Mode

Box Includes:

  • Just Jump handheld meter.
  • Large Mat
  • Instruction Sheet

Technical Specification:

  • Operating temperature: 0-65 degrees (32-150F)
  • Accuracy: – 1/2 of reading from 5-59
  • Relative Humidity: 95% RH or less at 30 degrees (85F) non-condensing
  • Storage Temperature: -25 to 70 degrees (-13 to 158F)
  • Battery Life: (Alkaline): 80 hours, typical at 30 degrees (73F)
  • Power: 9V Battery (NEDA1604A, 6F22, 006P)
  • Dimensions: 79cm x 76cm x 3cm)

Manufactured in the US by Probotics

Related Posts

Vertical Just Test Normative Data

10 Best Examples of Plyometric Training


Weight10 kg





Logo for probotics inc. featuring a red lightning bolt design with the company name in bold letters. around it are silhouettes of robotic figures in various action poses on a white background.

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