The authors point out that it is necessary to control the training frequency and intervals, provide junior gymnasts with rational diet so as to supply their organism with enough energy.

认为，训练中应控制训练次数、间隙时间，同时应采用合理的膳食结构，保证运动员机体的热量供给。

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Also, the fact of having to control two languages with frequency trains the brain and this training may slow down the loss of certain cognitive features that appear with ageing.

而且，通过频繁的大脑训练是可以掌握两种语言的，而这种训练还可以减缓随着年龄的增长而减少的认知力。

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You may need to alter your walk break frequency to adjust for breaks in your training, course conditions, and weather conditions.

在训练过程中，你也许需要多次调整步行安排，随着路程、天气的变化而变。

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It can be caused by a number of factors, including a rapid increase in the frequency of training, sudden increase in the intensity of training, transition from one training method to another, genetic abnormalities of the knee joint and poor base strength of the quadriceps.

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