Parameters influencing hand grip strength measured with the manugraphy system

Wichelhaus, Alice; Harms, Christoph; Ziegler, Steffen; Kundt, Günther; Prommersberger, K.-J.; Mittlmeier, Thomas; Mühldorfer-Fodor, Marion

doi:10.1186/s12891-018-1971-4

Cited by 23 publications

(19 citation statements)

References 36 publications

(44 reference statements)

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“…Even though some studies have detected a wide variance of estimation accuracy of grip force, self-reported by the operators [46], the results of the current study confirm the validity of using the Borg Scale, which gives general information on the force exerted [47,48,49].…”

Section: Discussionsupporting

confidence: 80%

Investigation of hand forces applied to a pruning tool – pilot study

Romano¹,

Caruso

Longo

et al. 2019

Ann Agric Environ Med.

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Introduction. Winter pruning is a cultivation practice necessary for maintaining the balance between the vegetative and the productive activity of plants and requires many working days using hand scissors. This operation involves the subjects carrying out a series of gestures that are repeated with considerable frequency, which are all musculo-skeletal disorders risk factors (MSDs) for the hand-wrist area. Objective. The aim of this study was to investigate the forces applied to pruning tools. Materials and method. Using a sensor matrix, peak and average forces were measured which are exerted while cutting branches of 3 different diameters, from 5 wine-grape cultivars. Samples were tested on 8 participants using sensored scissors to record, in 6 hand areas, the forces necessary to cut. Results. Results showed that while cutting, the factors which can impact the force employed (peak and average forces) by the subjects are branch diameter and percentage of branch humidity. Cut duration was inversely related to the size of the subject's hand. The middle finger area of the hand recorded the highest force average and peak levels, while the hand region least affected during the cuts was the farthest from the thumb. Conclusions. The study enabled the highlighting of which factors influence the forces employed by the operator while cutting grape branches, and to identify the hand regions where muscle activation is at its most. These findings can be relevant in preventing MSDs. Further studies need to be conducted with a larger number of subjects.

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Section: Discussionsupporting

confidence: 80%

Investigation of hand forces applied to a pruning tool – pilot study

Romano¹,

Caruso

Longo

et al. 2019

Ann Agric Environ Med.

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“…The present study is the first one employing manugraphy for the assessment of gripping in patients with Dupuytren's contracture prior and after unilateral surgery. Recently, we described significantly different grip forces with respect to sex and handedness ( 31 ). However, the limited number of patients enrolled in the current study did not allow to control for these confounders.…”

Section: Discussionmentioning

confidence: 99%

Dynamic Manugraphy as a Promising Tool to Assess the Outcome of Limited Aponeurectomy in Patients With Dupuytren's Contracture

et al. 2021

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Background: Dupuytren's contractures interfere with physiological gripping. While limited aponeurectomy is an accepted treatment modality to restore finger mobility, methods to objectify functional outcome beyond determination of the range of motion are scarce.Methods: Patients with Dupuytren's contracture being scheduled for unilateral limited aponeurectomy were invited to participate. Clinical data were gathered prospectively by chart review and interview. The DASH-score and flexion contracture for fingers were registered prior to surgery, 3 and 6 months afterwards. At the same time, dynamic manugraphy for simultaneous recording of the grip pattern and forces generated by the affected hand and anatomic areas (i.e., thumb, index finger, middle finger, ring finger, little finger and palm) were performed. All findings obtained during the follow-up period were compared to the situation at baseline. Comparison between paired samples was done using Wilcoxon rank test. All p-values are two-sided and p < 0.05 was considered to be significant.Results: Out of 23 consecutively enrolled patients, 19 (15 men, 4 women) completed follow-up examinations. Manugraphy confirmed the impairment of physiological gripping with concomitant pathological load distribution at base line. Limited aponeurectomy significantly reduced flexion contractures. However, the DASH-score remained at an excellent level in one patient, indicated improvement in 11 and worsening in seven patients. Six patients had lower grip force at t6 compared to the preoperative condition, although the preoperative flexion contracture (≥110°) was considerably improved in all of them. In four of those, the DASH-score improved while it turned worse in two of them. The force of surgically treated fingers remained unchanged in three patients while it was improved and worsened in half of the remaining patients, respectively. Manugraphy revealed physiological gripping by enlargement of contact area and higher force transmission by the fingertips in 10 of 12 patients with constant or even improved DASH-score and in three of seven patients with a worsened DASH-score.Conclusions: Assessing the reduction of flexion contracture and grip force alone is not sufficient to comprehensively reflect the functional outcome of aponeurectomy for Dupuytren's disease. Visualizing physiological grip pattern provides an additional tool to objectify the success of surgical treatment.

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“…strength. These include grip size, 15 dominance, 16 genetic factors and anthropometric variables. 17,18 Martien et al 19 investigated whether knee extension strength is a better predictor of functional performance than handgrip strength.…”

Section: Resultsmentioning

confidence: 99%

Knee extension strength and handgrip strength are important predictors of Timed Up and Go test performance among community-dwelling elderly women: a cross-sectional study

et al. 2021

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BACKGROUND: Handgrip and knee extension strengths have each been used to characterize disability. However, it has been reported that the association between handgrip and knee extension strengths is weak. OBJECTIVE: To evaluate the influence of knee extensor and handgrip muscle strength on Timed Up and Go (TUG) test results among elderly women with worse (≥ 10 seconds) and better (< 10 seconds) performance, after controlling for confounders. DATA AND SETTING: Cross-sectional study on a sample selected according to convenience, carried out in a federal public institution of higher education. METHODS: Assessment of handgrip was carried out using the Jamar dynamometer (Lafayette Instrument Company, Inc., Lafayette, United States). Knee extensor muscle performance was measured using an isokinetic dynamometer (Biodex System 3 Pro; Biodex Medical Systems, Inc., United States), The confounding factors were education, age, comorbidities, body mass index and Geriatric Depression Scale and Human Activity Profile scores. Functional performance was assessed through the TUG test. A backward linear regression model was used. RESULTS: 127 elderly women performed the TUG test in more than 10 seconds and 93 in less than 10 seconds. However, regardless of test performance, handgrip strength and knee extension strength comprised the reduced final model. CONCLUSIONS: Knee extension strength and handgrip strength might be particularly useful indicators for measuring disability. * Statistically significant. Knee extension strength and handgrip strength are important predictors of Timed Up and Go test performance among community-dwelling elderly women: a cross-sectional study | SHORT COMMUNICATION

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Parameters influencing hand grip strength measured with the manugraphy system

Cited by 23 publications

References 36 publications

Investigation of hand forces applied to a pruning tool – pilot study

Investigation of hand forces applied to a pruning tool – pilot study

Dynamic Manugraphy as a Promising Tool to Assess the Outcome of Limited Aponeurectomy in Patients With Dupuytren's Contracture

Knee extension strength and handgrip strength are important predictors of Timed Up and Go test performance among community-dwelling elderly women: a cross-sectional study

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