sumoPrimerwithorc matawari

Matawari is training to add the excursion of the hip joint.
Matawari is performed at the first stage of the training menu.

You sit in the ground while opening a foot parallel.
The person who cannot do it will sit down beforehand.
You bend a chest.
It prevents you from rounding a back.

You incline the body with right and left in the front.
Will be aware of touching a stomach in the ground than a chin.
The beginner must not overdo it.
Let's begin with the enacted place.
Or the beginner will have somebody push the back.

(please teach my English mistake)