Background

Increasing cadence in running has been advocated as a means to improve performance and reduce impact forces. Although acoustic pacing can be used for this purpose, it might by itself lead to an increased impact force, which would counteract the decrease in impact force that is being pursued by increasing the cadence with acoustic pacing and thus have a counterproductive effect.

Research question

What are the effects of acoustic pacing and cadence on peak impact force and loading rate during running?

Methods

Unpublished data from a previous study, in which 16 participants ran on an instrumented treadmill with various forms of acoustic pacing, were analyzed to address the research question. Peak impact force and loading rate while running with and without pacing, at three different cadences were extracted from the ground reaction force data and compared statistically between these two main conditions. In addition, we compared step-based and stride-based pacing, and paced and unpaced steps within stride-based pacing conditions.

Results

As expected, increasing the cadence was accompanied by a significant reduction in peak impact force and instantaneous vertical loading rate, whereas acoustic pacing had no significant effect on the impact forces compared to unpaced running with similar cadence, both before and after pacing. There were also no significant differences in this regard between step-based and stride-based pacing.

Significance

Acoustic pacing does not adversely affect impact force when used to increase cadence in running with the aim of reducing the impact force and can thus be used for this purpose without introducing a counterproductive effect.

中文翻译：

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声学步频调制对跑步冲击力的影响

背景

增加跑步的节奏已被提倡作为提高性能和减少冲击力的一种手段。虽然声学起搏可用于此目的，但它本身可能会导致冲击力增加，这将抵消通过增加声学起搏的节奏所追求的冲击力的降低，从而产生适得其反的效果。

研究问题

在跑步过程中，声学步频和节奏对峰值冲击力和负载率有什么影响？

方法

先前研究中未发表的数据，其中 16 名参与者在带有各种形式声学起搏的仪器跑步机上跑步，被分析以解决研究问题。从地面反作用力数据中提取三种不同节奏下在有和没有起搏的情况下跑步时的峰值冲击力和负载率，并在这两种主要条件之间进行统计比较。此外，我们比较了基于步幅和基于步幅的步调，以及基于步幅的步幅条件下的步幅和非步幅。

结果

正如预期的那样，增加节奏伴随着峰值冲击力和瞬时垂直载荷率的显着降低，而与起搏前后的无节奏跑步相比，声学起搏对冲击力没有显着影响。基于步数和基于步幅的起搏在这方面也没有显着差异。

意义

当用于增加跑步节奏以减少冲击力时，声学步调不会对冲击力产生不利影响，因此可以用于此目的而不会产生适得其反的效果。