How to get more information from your AxIT force trace
The peak force on a force trace during an isometric strength test is one of the most used metrics as it is considered a good reflection of maximum strength.
Rate of Force Development (RFD) is a crucial measure of explosive strength and reflects how quickly an individual can generate force. It quantifies the rapidity with which force is produced during a specific timeframe, typically in the early phase of a movement or contraction. RFD is vital for activities that require quick and powerful actions, such as jumping, sprinting, throwing, and various athletic movements but has also been shown to be one of the first muscle qualities lost due to age or may lag in the rehab process.
Muscle fatigue during an isometric strength test is typically evident on a force trace as a decline in force production over time. In the initial phase of the isometric contraction, the force trace usually shows a sharp rise, representing the peak force generated by the muscles during the voluntary effort. However, as the contraction continues, you may notice the force trace gradually declining or plateauing. This decline in force production is a characteristic sign of muscle fatigue.
The presence of irregularities or fluctuations in a force trace during force analysis may suggest an issue with motor control. Motor control is critical in coordinating and executing movements smoothly and efficiently such as dynamic movements like lunges, squats, and jumping. It involves the nervous system's ability to direct and regulate muscle contraction, ensuring precise and coordinated movements. When irregularities appear in the force trace, the motor control process may not be functioning optimally.