"back to the initial position" is correct and usable in written English.
You can use it to indicate that something is reverting to a starting point. For example, "After a month of strategizing, the team decided to go back to the initial position and try a new tactic."
After passive extension back to the initial position of 0°, no looping of the traction wire occurred (Fig. 7).
Pruning sequence, from the left to the right, the pruning mechanism should rotate an angle (theta) and turn back to the initial position several times until the tree branch has been pruned Fig. 16 realProcess16
In the ideal case, assuming the user takes no time to retract the foot, the pedal will still take some time to bounce back to the initial position with zero aspiration.
The disturbance (going away) took longer time than the restoration (coming back) to the initial position as can be clearly seen by comparing the numbers of green and purple-grey colored data which represent the model eye that goes away and comes back towards the resting position respectively in Fig. 6.
The examiner did not reposition the subjects' head back to the initial neutral position, but used the end position of the previous trial as the starting position for the next repetition.
Secondly, seated with legs at a 90-degree angle and feet firmly placed on the platform, children "hug themselves" and rise out of the chair into a standing position (~4 seconds) and then sit back down in the chair back to the initial seating position for 4 seconds before repeating this exercise for 6 repetitions.
At the signal, the participant rises to a full stand (body erect and straight) and then returns back to the initial seated position.
On the "Go" signal, the subject rose to a full stand and then returned back to the initial seated position, then completed as many full stands as possible within 30 seconds.
Subjects performed repetitions with knees on the ground, lowering body to a 90° elbow angle and then back up to the initial position.
Then slowly drop the spine back while your head returns to the initial position.
A relates to the initial position (resp. angle).
