Control of maximal and submaximal vertical jumps
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Citations
Electromyostimulation--a systematic review of the influence of training regimens and stimulation parameters on effectiveness in electromyostimulation training of selected strength parameters.
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Performing the vertical jump: movement adaptations for submaximal jumping.
Electromyostimulation—A Systematic Review of the Effects of Different Electromyostimulation Methods on Selected Strength Parameters in Trained and Elite Athletes
References
Motor Control and Learning: A Behavioral Emphasis
The contribution of muscle properties in the control of explosive movements
Temporal patterns of muscle activation for arm movements in three- dimensional space
Related Papers (5)
Frequently Asked Questions (8)
Q2. What is the role of the neural control signals in the control of movement?
Besides excitation and contraction dynamics, the dynamics of neural control signals can be a functional factor in the control of movement.
Q3. What was the subject's instruction during the jumps?
The subject was instructed keep his arms crossed behind his back during execution of the jumps, to jump without making preparatory countermovement and to initiate the jump as soon as possible after a beep signal.
Q4. What purpose was the study used to help the subject reproduce the same initial position each time?
To help the subject reproduce the same initial position each time a device was used which consists of two boards fixed to a pole in a hinge.
Q5. What are the differences in control signals to the muscles between maximal and submaximal jumps?
Differences in control signals to the muscles between maximal and submaximal jumps may consist of a combination of (i) a change in amplitude of control signals to the muscles, (ii) a change in shape of control signals to the muscles, and (iii) a change in relative timing of control signals to the muscles.
Q6. What is the role of the biarticular muscles in the coordination of multijoint movements?
a special role is attributed to biarticular muscles in the coordination of multijoint movements since they link the movements in different joints together (see e.g., 7).
Q7. Why is the amplitude of the control signals in the model used for excitation dynamics so?
This is due to the fact that in the model used for excitation dynamics (5), the equilibrium level of active state (the scaling factor for maximal force) is already 95% of its maximum at stimulation levels of the order of 0.4.
Q8. What was the difference in amplitude of the control signals to the muscles?
Before PCA, mean values were subtracted from the SREMG histories, and since in this part of the analysis the authors are only interested in differences in shape of control signals to the muscles and not in differences in amplitude, maximal and submaximal SREMG histories were normalized to unit variance.