集中练习。持续无间断的不超过90分钟的短周期练习，然后再休息。

Practice intensely, without interruption for short periods of no longer than 90 minutes and then take a break.

youdao

注意：当你在做这些注意力集中练习时，尽你所能不要紧张，这都是意念的。

Note: Try your best not to tense up while you are doing these concentration exercises, it is ALL mental.

youdao

练习一段音乐4个小时需要集中注意力，但它远不及一个在外过夜的14岁女孩对认知的要求。

Practicing a piece of music for four hours requires focused attention, but it is nowhere near as cognitively demanding as a sleepover with 14-year-old girls.

youdao