After my broken arm healed and my cast was removed, i found that my muscles had atrophied and it was difficult to use them in the same way i had before my injury. this statement refers to which of the sport training principles? specificity progression overload reversibility

Option D, Reversibility

Explanation:

Reversibility training in any physical training process is a way by means of which the lost sensitivity or functionality of any sense organ is regained through exercise.

Basically in this process of training, an athlete tries to regain the  lost effect of training after they has stopped exercising.

In this case the lost effect of removed cast and broken arm is tried to be  recovered through physical training known as Reversibility

Hence, option D is correct

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when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave