Braun-Trocchio Robyn, Williams Ashlynn, Harrison Kaitlyn, Warfield Elizabeth, Renteria Jessica
Sport and Exercise Psychology Lab, Kinesiology Department, Texas Christian University, Fort Worth, TX, United States.
Front Sports Act Living. 2022 Jan 7;3:798941. doi: 10.3389/fspor.2021.798941. eCollection 2021.
There has been a rapid increase in the use of wearable technology-based physical activity trackers. Most of these physical activity trackers include tracking and displaying the individual's heart rate (HR). There is little known about how HR monitoring influences the perception of exertion and attention allocation. Shifting attentional focus toward the body (association), such as monitoring HR, instead of environmental stimuli (dissociation) may increase one's perceived level of exertion. The purpose of the study was to examine the effects of HR monitoring on ratings of perceived exertion (RPE) and attention allocation during an exertive stepping task in individuals of varying fitness levels. The YMCA stepping task normative values determined fitness levels. For the experimental condition, participants were randomly assigned to one of two conditions (i.e., HR monitoring or control) and completed a stepping task with a weighted vest at 20% of their bodyweight. HR, RPE, and attention allocation were collected at 30-s intervals. Performing the stepping task resulted in a gradual increase of HR and RPE along with a shift from dissociative to associative attention across all conditions. Monitoring one's HR during the task resulted in more dissociative attention allocation, however, no RPE differences were reported between the two conditions. Unfit individuals reported lower levels of RPE during the first time point compared to fit individuals despite having higher HR throughout the task. The results of this study have relevance for applied practitioners implementing physical activity interventions with individuals who monitor their HR.
基于可穿戴技术的身体活动追踪器的使用迅速增加。这些身体活动追踪器大多包括追踪和显示个人的心率（HR）。关于心率监测如何影响用力感知和注意力分配，人们知之甚少。将注意力焦点转向身体（关联），比如监测心率，而非环境刺激（解离），可能会增加一个人的用力感知水平。本研究的目的是考察在不同健康水平的个体进行高强度踏步任务期间，心率监测对主观用力感觉评分（RPE）和注意力分配的影响。基督教青年会踏步任务的标准值确定了健康水平。在实验条件下，参与者被随机分配到两种条件之一（即心率监测或对照），并穿着相当于其体重20%的加重背心完成踏步任务。每隔30秒收集一次心率、主观用力感觉评分和注意力分配情况。在所有条件下，进行踏步任务都会导致心率和主观用力感觉评分逐渐增加，同时注意力从解离性转向关联性。然而，在任务期间监测心率会导致更多的解离性注意力分配，不过，两种条件下主观用力感觉评分并无差异。尽管在整个任务过程中不健康个体的心率较高，但与健康个体相比，他们在第一个时间点报告的主观用力感觉评分较低。本研究结果对于对监测心率的个体实施身体活动干预的应用从业者具有参考价值。
