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Abstract
Background: A novel form of functional training utilizes flexible fiberglass poles for resistance. Similar to elastic bands, as the poles flex, resistance increases. To date, no studies have examined activation patterns associated with such implements. Objective: This study examined muscle activation and torso rotation using different pole resistance intensities during a “push-pull” rotational core exercise. Methods: Twenty-one subjects (16 women, 5 men; age=20.4±1.3y) completed 6 trials of 10 repetitions each of a standing push and pull movement with 3 different pole tensions (very light, light, moderate). Muscle activation (electromyography) for the anterior and posterior deltoid, abdominal oblique, and paraspinal muscles were recorded. Concentric contractions during the push phase (PUSH) and the pull load (PULL) phases were recoded, and percent maximal voluntary contraction (%MVC) was computed. Markers on the acromion process and a vertically mounted camera were used to record torso rotation during each push and pull. ANOVA for each muscle and PUSH and PULL was used for comparisons across pole intensity. Results: Significant main effects for torso rotation were seen, with rotation with the very light pole (Push= 61.9 ± 9.20, Pull= 64.8 ± 14.00) significantly greater than moderate (Push= 52.0 ± 12.80, Pull= 54.9 ± 10.10). EMG data were highly variable, with no differences in muscle activation detected across pole resistance loads. Conclusion: Variability of the EMG data prevent clear resolution of activation patterns. However, torso rotation is limited with heavier pole resistance since increased pole flex also increases resistance.
Highlights
Functional performance of a range of daily activity and athletic skills requires that core musculature provide a stable base during movements such as running, jumping, and sudden changes in position
EMG data were highly variable, with no differences in muscle activation detected across pole resistance loads
Torso rotation is limited with heavier pole resistance since increased pole flex increases resistance
Summary
Functional performance of a range of daily activity and athletic skills requires that core musculature provide a stable base during movements such as running, jumping, and sudden changes in position. Alternative forms of resistance training have been developed using elastic bands or flexible materials, which overcome these limitations [3 - 5]. Uchida et al [11] published data showing tension for Thera-BandTM elastic bands at strain values between 25% and 250% of resting length. By quantifying the resistance of these bands, these data provided useful information to practitioners that allow them to appropriately prescribe loads for training. A novel form of functional training utilizes flexible fiberglass poles for resistance. No studies have examined activation patterns associated with such implements
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