相比之下，在游泳项目上，白人较长的躯干和位置较低的肚脐是有利条件。
"Swimming is the art of surfing the wave created by the swimmer,"said the professor. "The swimmer who makes the bigger wave is the faster swimmer, and a longer torso makes a bigger wave. Europeans have a three-percent longer torso than West Africans, which gives them a 1.5-percent speed advantage in the pool," he said.
该教授说：“游泳是冲浪艺术。游泳者制造浪花。浪花造的越大，游得就越快。游泳者的躯干越长，就越容易制造大朵浪花。欧洲人的躯干一般比西非人长3%，这就使得他们游泳时有1.5%的速度优势。”