修習止觀坐禪法要 1.67

1.67

次當正身，先當挺動其身，并諸支節，作七八反，如似按摩法，勿令手足差異。如是已，則端直，令脊骨勿曲勿聳。

Next, straighten the body: first stretch and move the body along with all the joints seven or eight times, like a method of massage, not letting the hands and feet become misaligned. Having done this, sit upright and straight, letting the spine be neither bent nor arched high.