Anapanasati Buddhist meditation
It is more gentle than that. Consider the first tetrad of anapanasati:

Breathing in long, he discerns, 'I am breathing in long';
or breathing out long, he discerns, 'I am breathing out long.'
Or breathing in short, he discerns, 'I am breathing in short';
or breathing out short, he discerns, 'I am breathing out short.'
He trains himself, 'I will breathe in sensitive to the entire body.'
He trains himself, 'I will breathe out sensitive to the entire body.'
He trains himself, 'I will breathe in calming bodily fabrication.'
He trains himself, 'I will breathe out calming bodily fabrication.'

And the second:

He trains himself, 'I will breathe in sensitive to rapture.'
He trains himself, 'I will breathe out sensitive to rapture.'
He trains himself, 'I will breathe in sensitive to pleasure.'
He trains himself, 'I will breathe out sensitive to pleasure.'
He trains himself, 'I will breathe in sensitive to mental fabrication.'
He trains himself, 'I will breathe out sensitive to mental fabrication.'
He trains himself, 'I will breathe in calming mental fabrication.'
He trains himself, 'I will breathe out calming mental fabrication.'

Emphasis are mine. These are strong hints.
From my understanding, stiffness, rigidity, force should be absent -- only the minimum should be allowed so one doesn't fall on the ground, or sleep; any small amount of extra effort disturbs the mind.