假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句最多有两处。每处错误仅涉及一个单词的增加、删除和修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（＼）划掉。
修改：在错的词下画一横线，并在该词下面写出修改后的词。
注意：1)．每处错误及其修改均仅限一词；
2)．只允许修改10处，多者（从第11处起）不计分。
My dad is an enthusiastic runner. Influencing by him, I was very sporty before the age of 15. Therefore, after I went to high school, I stopped to taking physical exercise because of my busy schoolwork. One morning, I ran for only one minute to catch a bus, but I was quite out breath. This made me realizing that I was overweight. Then I made a decision which I would take up a sport to help myself get in shape again. A friend of me recommended(推荐) a swimming pool not far away from my house. Now I go swimming several times one week and have started to feel the benefit of regularly exercise. Swimming makes me relaxed and energy.
参加体育小组的一共有20人。