The Effect of Lift Teams on Kinematics and Muscle Activity of the Upper Extremity and Trunk in Bricklayers

Anton, Dan; Mizner, Ryan L.; Hess, Jennifer A.

doi:10.2519/jospt.2013.4249

Cited by 13 publications

(14 citation statements)

References 66 publications

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“…Secondary purposes of this study were to determine: 1) if force through the UE is symmetrical during bilateral weight bearing and 2) if PM muscle activation is directly related to UE weight bearing force. [20][21][22]. A palm press was performed with "shoulders flexed 90 degrees bilaterally with the heel of the hands together and elbows flexed 20 degrees as arms were horizontally adducted" [20].…”

Section: Methodsmentioning

confidence: 99%

Feedback Training Improves Accuracy of Estimating Upper Extremity Weight Bearing During Functional Tasks: Implications After Open Heart Surgery

LaPier¹,

Cleary²

2019

IJPR

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Background: Patients often need to use their arms to assist with functional activities, but after open heart surgery pushing with the arms is limited to minimize force across the healing sternum. Objectives:The main purposes of this study were to determine: 1) how accurately patients can estimate arm weight bearing with 10 lb or less of force and 2) if feedback training is effective for improving ability to estimate arm force and reduce pectoralis major muscle contraction during functional activities.Materials and Methods: An instrumented walker was used to measure arm force during functional mobility tasks including walker ambulation and sit-stand transfers. Pectoralis major muscle electromyography (EMG) activity was measured simultaneously in study participants (n = 21). After baseline testing, study participants underwent a brief session of visual and auditory concurrent feedback training. Data analyses included t-tests, ANOVA, and Pearson correlations (P<0.05).Results: Results showed that self-selected arm force was greater than 10 lb for all tasks (11.7-19.0 lb) but after feedback training, it was significantly lower (8.3-9.8 lb). During most trials (67%), study participants used more than 12 lb of arm force. Pectoralis major muscle EMG values were less than 10% of maximal voluntary contractions and were reduced (2.7-3.3%) after feedback training. Conclusions:Results indicate that patients may not be able to accurately estimate upper extremity force used during weight bearing activities, and that visual and auditory feedback improves accuracy. Activation of the pectoralis major muscle during arm weight bearing is minimal, suggesting minor force occurs across the sternum. An instrumented walker and feedback training appear to be very clinically useful for patients recovering from open heart surgery.

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Section: Methodsmentioning

confidence: 99%

Feedback Training Improves Accuracy of Estimating Upper Extremity Weight Bearing During Functional Tasks: Implications After Open Heart Surgery

LaPier¹,

Cleary²

2019

IJPR

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“…Team handling occurs when two or more people are involved in a manual handling task. Team handling is common in many occupations, such as the military [1], the medical field for patient transfers [2][3][4][5][6][7], the construction industry [8,9], and by movers [10]. The team movement strategy emerges from the interaction of the task, the environment, and the individuals.…”

Section: Introductionmentioning

confidence: 99%

“…Some of them have involved kinematic analysis during patient transfers [2,11] using the Lumbar Motion Monitor [12]. Other studies, conducted in the laboratory, have investigated low back loading [8,9,13,14]. Traditionally, this type of study requires the measurement of the handler's kinematics and of external force contacts: either ground reaction forces (GRF) using force platforms or hand forces (HF) using instrumented handles.…”

Section: Introductionmentioning

confidence: 99%

“…The use of force sensors limits the realism of experimental tasks by obliging handlers to use handles or constraining their foot displacements [13]. Subjects must either remain on a platform throughout the handling task [9,14] or follow a predefined footstep pattern on several platforms [8]. These experimental aspects limit the ecological validity of the analyses performed [13].…”

Section: Introductionmentioning

confidence: 99%

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Back loading estimation during team handling: Is the use of only motion data sufficient?

Muller

Corbeil

2020

PLoS ONE

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Analyzing back loading during team manual handling tasks requires the measurement of external contacts and is thus limited to standardized tasks. This paper evaluates the possibility of estimating L5/S1 joint moments based solely on motion data. Ten subjects constituted five two-person teams and handling tasks were analyzed with four different box configurations. Three prediction methods for estimating L5/S1 joint moments were evaluated by comparing them to a gold standard using force platforms: one used only motion data, another used motion data and the traction/compression force applied to the box and one used motion data and the ground reaction forces of one team member. The three prediction methods were based on a contact model with an optimization-based method. Using only motion data did not allow an accurate estimate due to the traction/compression force applied by each team member, which affected L5/S1 joint moments. Back loading can be estimated using motion data and the measurement of the traction/compression force with relatively small errors, comparable to the uncertainty levels reported in other studies. The traction/compression force can be obtained directly with a force measurement unit built into the object to be moved or indirectly by using force platforms on which one of the two handlers stands during the handling task. The use of the proposed prediction methods allows team manual handling tasks to be analyzed in various realistic contexts, with team members who have different anthropometric measurements and with different box characteristics.

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“…Muscles in the upper body are recruited when performing workrelated manual labor [2,26], sport activities [6,21,23,33], and locomotor movements such as wheelchair propulsion [15]. During upper-body tasks the lower body also plays a critical role [11,13,19,20,28].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Lower Body on Seated Arm Cranking Performance

et al. 2018

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During upper-body tasks, use of the lower body is important for minimizing physiological strain and maximizing performance. The lower body has an integral role during upper-body tasks, however, it is less clear if it is also important during upper-body tasks. We determined the extent to which the lower body influenced seated arm cranking performance. Eleven males performed incremental (40+20 W·3 min) and short-duration maximal effort (5 s, 120 rpm) arm cranking trials with and without lower-body restriction. The lower body was restricted by securing the legs to the seat and suspending them off the floor. Upper-body peak oxygen consumption (V̇O) and maximal power were determined. At the end of the incremental protocol, lower-body restriction reduced V̇O by 14±12% (<0.01) compared to normal arm cranking. At greater submaximal stages (60-100% isotime) heart rate, ventilation, RER, and arm-specific exertion increased to a greater extent (all <0.05) with lower-body restriction. During short duration maximal arm cranking, lower-body restriction decreased maximal power by 23±9% (<0.01). Results indicated that lower-body restriction limited aerobic capacity, increased physiological strain during high-intensity submaximal exercise, and compromised maximal power generating capacity. These results imply that use of the lower body is critical when performing seated arm cranking. Our findings have implications for exercise testing, training and rehabilitation.

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The Effect of Lift Teams on Kinematics and Muscle Activity of the Upper Extremity and Trunk in Bricklayers

Cited by 13 publications

References 66 publications

Feedback Training Improves Accuracy of Estimating Upper Extremity Weight Bearing During Functional Tasks: Implications After Open Heart Surgery

Feedback Training Improves Accuracy of Estimating Upper Extremity Weight Bearing During Functional Tasks: Implications After Open Heart Surgery

Back loading estimation during team handling: Is the use of only motion data sufficient?

Influence of the Lower Body on Seated Arm Cranking Performance

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