Athletes who train hard inaerobic(6)sports, such as cycling, running or swimming, tend to have a bigger heart that pumps more blood throughout the body.
从事强烈有氧运动如骑车、跑步或者游泳的运动员的心脏容易大于常人的，因为他们需要更快的血液循环。
2
They also contain vitamin K, which helps to heal bruises and other minor sports injuries by ensuring blood is able to clot normally.
它们也包含维他命k，有助于治疗瘀伤和其它极小的运动伤害通过确保血能够通常的凝结成块。
3
As a good form of sports, swimming could strengthen people's muscles and reduce their blood pressure.