Activforce 2 includes a handheld dynamometer and inclinometer that provide accurate force and angle measurement along with an easy-to-use companion application that tracks and records patient progress. The comprehensive Activforce 2 platform provides real-time strength and range of motion measurements and tracks patient progress along the rehabilitation continuum.

The Activforce 2 package includes the following components

  • Activforce 2 dynamometer

  • Rounded pad

  • Arched pad

  • Hand and leg straps

  • Mobilization belt

  • Belt loop plate

  • Custom carrying case

The rounded pad is the default accessory for measuring strength and range of motion on most body parts, while the arched pad is used to test angular body parts such as the elbow. The mobilization belt aids in pull measurements by helping therapists apply traction to the spine or the joints to stabilize movement during certain protocols. Hand and leg straps are provided to securely hold the Activforce 2 dynamometer in place during measurement.

Attaching a Pad to Your Activforce 2 Dynamometer


Turning Your Activforce 2 Dynamometer On/Off

A BLUE flashing light indicates the Activforce 2 dynamometer is available for a Bluetooth connection with a compatible app.
A GREEN flashing light indicates the Activforce 2 dynamometer is connected to an app.
A RED flashing light can indicate two separate states. Periodic red flashes indicate that the battery is low and needs replacement, while a single red flash indicates that the device has been successfully turned off.

Attaching and Using Hand Straps on You Activforce 2 Dynamometer


Replacing the Battery on Your Activforce 2 Dynamometer

Activforce 2 comes with a standard AAA battery, which lasts between 6 and 12 months.
To replace the battery, follow these simple steps:
You need a new AAA battery & a flat-head screwdriver.
Hold Activforce 2 and the screwdriver like this.
The Activforce star logo should NOT be visible.
Insert the tip of the screwdriver in the opening and softly turn until you here a CLICK sound. The lid pops slightly opened.
Gently slide the screwdriver along the edge of Activforce2, keeping the tip inside the crevice, until you get to the spot as shown in the picture. Then stop and slightly turn until you hear a CLICK. The lid is now open and you can carefully remove it.

Activforce 2 Summary Reports

The Activforce 2 platform generates comprehensive summary reports that can automatically be emailed to the account holder for inclusion in patient records.

Activforce 2 Specifications

Physical Dimensions – Activforce 2 Device

  • Weight: 137 gram / 4.8 oz (with battery)

  • Length: 95 mm / 3.7 in

  • Width: 78 mm / 3.1 in

  • Height: 33 mm / 1.3 in

  • Volume: 139 cm³ / 8.5 in³ (approx.)

Physical – Package (case)

  • Weight: 635 gram /22.4 ounces

  • Length: 360 mm / 14.2 in

  • Width: 152 mm /6 in

  • Height: 100 mm /3.94 in

  • Volume: 5,472 cm³ /333.92 in³ (approx.)


Hand Strap

  • Length: 34.29 cm /13.5 inch

  • Width: 3.81 cm /1.5 inch

Leg Strap

  • Length: 80.01 cm/31.5 inch

  • Width: 3.81 cm /1.5 inch


  • Length: 247.9 cm /97.6 inch

  • Width: 3.81 cm /1.5 inch


  • Force Range: 90 kg / 200 lb

  • Force Accuracy: within ± (1.4 lb + 5% of the applied force)

  • Range of Motion Accuracy : The greater of ±3%  or  ±1 degree.

    • ± 1 degrees for angles measured between 0 and 33 degrees (inclusive) 

    • ± 3 degrees of the measured angle for angles greater than 33 degrees

  • System Requirements: 

    • Android 8 and newer 

    • iOS 11.4 and newer

  • Connectivity: Bluetooth® 4.1 (Frequency Range: 2402 – 2480 MHz)​

  • Operating distance: up to 2 m / 7 ft (from the Activforce 2  App host device)


  • Battery type: 1x AAA battery (replaceable), 1.5 V

  • Battery life: 6 months (may vary with usage and/or environmental conditions)


  • Operational Temperature: 0 to 35 °C / 32 to 95 °F

  • Storage Temperature: -25 to 50 °C / -13 to 122 °F

  • Humidity: 15% – 93% RH

  • Pressure: 700 to 1060 hPa (IEC 60601-1-11 clause 4.2.2.)



The Activforce 2 dynamometer is designed for measuring compressive forces up to 90 kg  or 200  lbs. by  applying  pressure  to  the dynamometer’s  exterior  surfaces,  when  placed  between  two  body  parts,  such  as  your  palms,  or  a  body  part  and  object,  such as your palm and a desktop. Pressing on or near the belt will result  in  an  inaccurate  force  measurement and may cause physical injury. Make sure to  follow  the  instructions  and  guidelines,  as  provided in the Activforce 2 mobile companion app and/or the FAQ's.


The Activforce 2 dynamometer is certified  compliant  with  all  required  safety  standards  and  regulations,  including  electro-magnetic  compatibility  and  hazardous  materials,  for  all  territories  it is distributed in.


The Activforce 2 dynamometer is not waterproof and should not be immersed in or   sprayed   with   water   or   other   liquids.   Like many consumer electronic  devices,  it   is  flammable  and  should be kept from exposure to flame or other excessive heat sources. The dynamometer performance can be also affected by extreme temperature or humidity.


The Activforce 2 dynamometer's external surfaces, including rounded pad and arched soft pad silicon surface can be hand wiped at room termperature with a soft cloth saturated with a cleaning agent such as a 70% solution of isopropyl alcohol and water. The cleaning agent should be allowed to evaporate completely before using the dynamometer. Other antibacterial cleaning agents can be used, such as:

  • non-alcohol based hand wipes

  • alcohol based hand gels consisting of 70% ethanol

These agents may leave trace residue which ca be wiped away with a soft, dry, clean tissue. A bleach solution of hypochlorite at 10,000ppm (or 1% solution) can also be used to clean the dynamometer surfaces, re-attachble pads and silicon covers.


Your Activforce 2 dynamometer undergoes a normal reset cycle  each  time  you turn it on and on. In rare troubleshooting situations, a  hard  reset  may  be  required.  To do this,  simply  take  the  battery  out  of  its  compartment and insert it back in, following the battery replacement instructions in this User Manual.

Service and Troubleshooting

Other than the  Battery   Replacement   and   Reset (as   described  in  this  User  Manual),  the Activforce 2 dynamometer is designed  for service by authorized personnel only. For further information, please contact

Disposal (End of Life)


In the European  Union,  this  symbol  indicates  that  this  product  should  not  be  disposed  with  other  household  waste. Batteries should be discarded separately, and the device should be deposited at an appropriate facility to enable recycling. Please separate these items from other types of waste  and  recycle  them  responsibly,  following  your   local   government’s   disposal   guidelines   and/or   electronic  parts  return  system. 


To get started using your Activforce 2 today, download the Activforce 2 app from the Apple App Store or Google Play store. Follow the instructions in the app to register for an account and pair your device using Bluetooth. Visit our tutorial section (Tutorial) for instructional videos and sample protocols and check out our Frequently Asked Questions (FAQ) for more information.


Activbody, Inc.

4435 Eastgate Mall Suite 100

San Diego, CA 92121, USA