假如你叫李华，你校初三年级同学正在开展一场讨论，主题是“初三学生要不要参加体育锻炼”。请根据下面所提供的*，用英语总结出讨论情况。
提示：
70%的学生
30%的学生
应该每天进行体育锻炼，但不要时间过长
锻炼浪费时间、使人疲劳
锻炼能增强体质，保持健康
锻炼以后很兴奋，较长时间不能投入学习
锻炼能使大脑休息，使学习效果更好
锻炼中可能会*
要求：语句通顺，句意连贯；词数为80词左右；发言稿的开头已写好，但不计入总词数。
dear classmates:
i’m li hua after the discussion we found that 70% of the students think they should take all kinds of exercise *ry day but not spend too much time. they think exercise builds body and can keep them healthy. sports also let them have a good rest so that their study will be * effective.
on the other hand 30% students beli* taking exercise is tiring and it’s a waste of time. they say that after having sports they are too excited for a long time to focus on their lessons. and it’s possible to be hurt while doing sports.
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