Muscle activity during the incline shoulder press in relation to the exercise intensity

IF 0.9 Q4 SPORT SCIENCES

Acta Gymnica Pub Date : 2018-12-31 DOI:10.5507/ag.2018.019

Katarzyna Stronska, P. Bojacz, A. Gołaś, A. Maszczyk, A. Zając, P. Stastny

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引用次数: 2

Abstract

Background: The incline machine shoulder press (IMSP) is an alternative resistance exercise to the bench press associated with throwing performance. The muscle activity during IMSP has not yet been described in females and at different exercises intensities. Objectives: The aim of this present study was to investigate changes in the activity of prime movers during the IMSP in relation to the exercise intensity in female athletes. Methods: Eight female athletes experienced in resistance training were screened for peak electromyography amplitude normalized for maximum voluntary isometric contraction during the IMSP with increasing loads of 40%, 60%, 80% and 100% of 1 repetition maximum (1RM). The selected muscles were the anterior deltoid (AD), pectoralis major (PM), triceps brachii long head (TBlong) and triceps brachii lateral head (TBlat). Results: The results of Friedman ANOVA showed increased muscle activity along with exercise intensity in all prime movers (p < .001). The Kruskal-Wallis ANOVA showed inter-muscle differences at exercise intensity of 40% 1RM (p = .004, ηp2 = .52), 60% 1RM (p = .005, ηp2 = .55), 80% 1RM (p = .035, ηp2 = .46) and 100% 1RM (p = .002, ηp2 = .52), where TBlat showed lower activity than other muscle groups at each exercise intensity. The TBlong showed lower activity than the PM and AD at 40% 1RM, and the PM activity was lower than that of AD and TBlong at 100% 1RM. Conclusions: The IMSP is an exercise which activated AD and TBlong more than PM and TBlat during maximal lifting effort. Therefore, the IMSP should be understood as the exercise which might substantially overload the AD and TBlong during maximal lifts. Coaches should use the IMSP if they desire to activate TBlong more than TBlat during upper limb pressing.

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倾斜肩压时肌肉活动与运动强度的关系

背景:倾斜机肩压(IMSP)是与投掷性能相关的卧推的替代阻力练习。IMSP期间的肌肉活动尚未在女性和不同的运动强度下进行描述。目的:本研究的目的是探讨在IMSP期间，原动机的活动变化与运动强度的关系。方法:对8名参加过阻力训练的女运动员进行肌电图峰幅归一化，测定其在1次最大重复(1RM)负荷增加40%、60%、80%和100%时的最大自主等长收缩。选择的肌肉是前三角肌(AD)、胸大肌(PM)、肱三头肌长头(TBlong)和肱三头肌外侧头(TBlat)。结果:Friedman方差分析结果显示，随着运动强度的增加，所有主要运动者的肌肉活动增加(p < 0.001)。Kruskal-Wallis方差分析显示，运动强度的肌肉间差异为40% 1RM (p = 0.004， ηp2 = 0.52)、60% 1RM (p = 0.005， ηp2 = 0.55)、80% 1RM (p = 0.035， ηp2 = 0.46)和100% 1RM (p = 0.002， ηp2 = 0.52)，其中TBlat在每种运动强度下的活动均低于其他肌肉群。1RM为40%时，TBlong活性低于PM和AD, 1RM为100%时，PM活性低于AD和TBlong。结论:在最大举力时，IMSP是一种比PM和TBlat更能激活AD和TBlat的运动。因此，IMSP应该被理解为在最大举重时可能会使AD和TBlong超负荷的运动。如果教练希望在上肢按压时激活TBlong多于TBlat，则应使用IMSP。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Gymnica SPORT SCIENCES-

CiteScore

2.00

自引率

0.00%

发文量

审稿时长

12 weeks

期刊介绍： The journal "Acta Gymnica" (ISSN 2336-4912 (Print); ISSN 2336-4920 (On-line)), published formerly as "Acta Universitatis Palackianae Olomucensis. Gymnica" (ISSN 1212-1185 (Print); ISSN 1213-8312 (On-line)), focuses on presenting results of research studies and theoretical studies from the field of kinanthropology. The scope of the journal covers topics related to biomechanics, exercise physiology, physiotherapy, somatometry, sports psychology, sports training, physical education, public health, etc. The journal also welcomes submissions that present results of interdisciplinary research.