Let's consider this question from the point of view of biomechanics.
It does not matter if the child was on the floor as a result of undesirable behavior and you want to pick him up or finished the exercise on the mat and requires help to get up.
It is important to know how to safely, without injuring the child, support him.
Please do not pull the children's hands.
One of the features of the behavior of children with ASD (and not only) is throwing on the floor.
How to correct this behavior in a specific situation, to lift the child or not-you decide, but if you still have to lift the child-you need to know how to do it without injury.
What is the danger: the child at the moment of protest is usually either very relaxed, or, on the contrary, tense, resists you and at this moment you pull him by the hand, try to sharply raise the entire weight of the body, maximally loading the shoulder joint (also the elbow and wrist), which are usually quite fragile in children with ASD.
Such sharp pulling movements and incorrectly distributed load can dislocate the joint, overgrow the ligaments and tendons, twist the vertebrae around its axis due to a sharp tilt of the head back, thereby causing a hidden injury.
How to replace the arm pull-lift the child under the armpits, or, if you pull by the hand, then hold the back or armpit of the other hand.
This applies not only to lifting from the floor.
When you walk/run to school in the morning, for example, a child has a briefcase on his left hand, you go ahead and pull the child by the right hand. The danger remains the same. The injuries are the same.
This affects the child's posture in the future, and the blood supply, which affects attention, memory, thinking, behavior.
Be careful!