Do you know these words?

• こしを　あげる

  to raise one's rear end ; to raise one's lower back

• あげおろし（を）する

  to raise and lower

• あしを　ひろげる

  to move one's legs apart

• うでを　だす

  to put out one's arm

• こしを　うかす

  to rise one's lower back