Fetching details from the dictionary...
to shrug (shoulders); to duck (head); to draw back (body)
寒さむさに竦めすくめた体からだ。
A body hunched from the cold.
肩かたを竦めるすくめる仕草しぐさ。
A gesture of shrugging shoulders.
驚きおどろきに首くびを竦めすくめてしまった。
I ended up ducking my head in surprise.