(1)朋友有高血压、脂肪肝,医生叮嘱他多锻炼。怎么锻炼呢?他不喜欢篮球、足球,对单杠、哑铃更是手生得很。他选择了跑步,觉得跑步的技术含量最低,也相对安全。(2)大学的田径场,早晨8点以前与晚6点以后向公众开放。因此,这两个时间段人也最多,有慢走、快走的,有慢跑、快跑的,还有倒着走路的。朋友在 (1) friends have high blood pressure, fatty liver, the doctor told him to exercise more. How to exercise? He does not like basketball, soccer, horizontal bar, dumbbell is very hand-made. He chose to run, feel the lowest technical content of running, but also relatively safe. (2) University track and field, open to the public before 8 am and after 6 pm. Therefore, these two time periods are the most people, there are walking, walking, jogging, running, and walking backwards. Friends