Dynamic-Express is the first and only computer-based, fully automated system for the quantitative assessment of physical fitness levels based on spectral analysis of R-R interval variability during exercise. This system can be used for the fitness evaluation of professional athletes, as its sophisticated algorithms can objectively evaluate fitness levels and detect overtraining in a precise and highly reproducible manner. 

Dynamic-Express uses a convenient “Zephyr” strap with a Bluetooth transmitter to collect R-R interval variability data for analysis. The evaluation is performed during exercise on a bicycle ergometer or treadmill and takes approximately 25 to 30 minutes to administer. The results of the analysis are presented in a user-friendly interface, are conveniently stored in the client database, and can be printed at any time.

Fitness evaluation by Dynamic-Express is based on the analysis of two parameters:

1. Physical reserve level, which incorporates information regarding chronotropic myocardial reaction, exercise intensity, and length of the short recovery period. The short recovery period is calculated as the time at which R-R intervals reach 72% of the individual’s baseline.

2. Dynamic ability level, which is based on the functionality of all regulating mechanisms involved during the workout and evaluated as the long recovery period. The Dynamic-Express system utilizes a new approach for assessment of the long recovery period by determining the time at which all regulatory mechanisms, including autonomic regulation, return to the individual’s baseline.


Fitness score assessment based on workout on a bicycle-ergometer