While a progressive increase in the degree of instability during resistance training may be recommended during rehabilitation [14], literature that provides progression models based on muscle activity and postural manipulations is scarce. As far as we are concerned, there is only one study [15] that provided a core progression based on muscle activity and performed one exercise with an unipedal stance, although this modification not enhance muscle activity compared with the same exercise performed with an unstable device. Nevertheless, authors only used an unstable device that may be insufficient to enhance balance disruptions and muscle activity in experienced participants [16].
There are several studies investigating muscle activity when performing exercise on unstable surfaces [10], although authors did not report a progression model of different exercises that target the core musculature, especially involving changing the surface (i.e., uniaxial unstable surface, multiaxial unstable surface and a stable surface) and also involving postural manipulations (i.e., seated/standing and one leg stance/bipedal stance) with/without the addition of elastic resistance. All these variations may suppose different instability degrees and thus different muscle recruitment levels. Therefore, our purpose was to investigate the core muscle activity in a series of balance exercises with different stability levels and additional elastic resistance to establish a progression based on the amount of muscle activity. We hypothesized that progressive postural manipulations may involve higher amount of core muscle activity in order to maintain postural control and perform the exercise with the correct technique.
ในขณะที่เพิ่มความก้าวหน้าในระดับของความไม่แน่นอนในระหว่างการฝึกอาจจะแนะนำในระหว่างการฟื้นฟู [14], วรรณกรรมที่ก้าวหน้าแบบจำลองตามกิจกรรมของกล้ามเนื้อ และ manipulations ภาพเนื้อ postural จะขาดแคลน เท่าที่เรามีความกังวล ได้ศึกษาเพียงหนึ่ง [15] ที่มีความก้าวหน้าหลักตามกิจกรรมของกล้ามเนื้อ และทำแบบฝึกหัดหนึ่ง ด้วยท่าทาง unipedal แม้ว่าการแก้ไขนี้ไม่เพิ่มกล้ามเนื้อกิจกรรมเปรียบเทียบกับการออกกำลังกายเหมือนที่ทำกับอุปกรณ์ไม่เสถียร อย่างไรก็ตาม ผู้เขียนใช้เฉพาะอุปกรณ์ไม่เสถียรซึ่งอาจไม่เพียงพอเพื่อเพิ่มสมดุลหยุดชะงักและกิจกรรมของกล้ามเนื้อในผู้เข้าร่วมมีประสบการณ์ [16]There are several studies investigating muscle activity when performing exercise on unstable surfaces [10], although authors did not report a progression model of different exercises that target the core musculature, especially involving changing the surface (i.e., uniaxial unstable surface, multiaxial unstable surface and a stable surface) and also involving postural manipulations (i.e., seated/standing and one leg stance/bipedal stance) with/without the addition of elastic resistance. All these variations may suppose different instability degrees and thus different muscle recruitment levels. Therefore, our purpose was to investigate the core muscle activity in a series of balance exercises with different stability levels and additional elastic resistance to establish a progression based on the amount of muscle activity. We hypothesized that progressive postural manipulations may involve higher amount of core muscle activity in order to maintain postural control and perform the exercise with the correct technique.
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