Some studies show that party goers are more comfortable approaching people who stand with an open body, arms uncrossed and hanging at their sides, legs slightly separated, and a slight smile on their faces.

여기서 approaching이 분사구문인데
그뒤에 and가 두개가 나와요
그럼 병렬구조가 두부분으로 나눠지는건가요?
두개의 and가 해석이 어디까지 묶여져서 해석해야하나요