The Future of Resistance Band Training

The Future of Muscle Function Testing

The kiio Sensor accurately measures, stores, and wirelessly communicates force over time during any exercise. On-board sensors, a CPU, and special electronics calculate actual force, power, exercise pacing, and more.

The kiio Sensor is integrated with kiio FLEX software to offer a comprehensive solution for assessing, training, monitoring, and improving the overall performance of patients and athletes. With 50 samples per second and over 99% accuracy, results are continuously and instantly delivered wirelessly throughout an exercise, making quantitative metrics available in real time for each and every repetition. Objective data is automatically recorded and displayed against target effort and timing, assisting with proper effort and frequency for each exercise. Audio and visual alerts indicate when limits are exceeded, helping to ensure proper performance and safety.

The kiio Sensor is approximately the size and weight of an average smartphone, and includes a rechargeable battery with greater than 6 hours of life per charge. In addition to allowing real-time transmittal of data to kiio FLEX software, the kiio Sensor can also store hundreds of hours of data, ready to be downloaded at a later time. The kiio Sensor thus enables objective data collection virtually anywhere, anytime.

The kiio Sensor is a highly adaptable in-line device. The patented quick interchange system allows the kiio Sensor to interconnect with almost any equipment. A short list of some products the kiio Sensor can connect with includes:

kiio Wall Gym

Wall Mounted Versatile Exercise Station

kiio Study – Reliability, Responsiveness, and Criterion Validity of the kiio Sensor, a New Tool for Assessment of Muscle Function


Musculoskeletal injuries are a leading cause of disability in the general population and U.S. military, resulting in enormous direct and indirect costs.



Forty-four (24 male, 20 female) civilian adults (age, mean [SD] = 21.2 [1.5] years) with no history of upper extremity injury in the last year and no current complaints of pain, weakness, or functional limitation participated. Males averaged 179 cm tall (range 168–199 cm), with mean weight of 84.1 kg (range 64.4–161.0 kg).


Individuals participated in two separate sessions one week apart, at the same time of day to maximize consistency of recent activity levels.


Current methods of muscle assessment are limited in their ability to objectively quantify impairments of localized muscle function, rendering them impractical for widespread augmentation of comprehensive functional testing. The kiio Sensor demonstrates excellent reliability, responsiveness, and validity compared with a gold standard ID in a group of healthy participants.

Read the full study

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