A possible anatomical and biomechanical explanation of the 10% rule used in the clinical assessment of prehensile hand movements and handed dominance

Yielder, Paul; Gutnik, B.; Kobrin, V I; Hudson, G.

doi:10.1016/j.jelekin.2009.02.005

Cited by 5 publications

(3 citation statements)

References 36 publications

(45 reference statements)

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“…Sahrmann (2002) suggested that greater muscle development and therefore muscle stiffness on the right side would limit lateral bending to the left. Certainly, right grip strength was greater for all groups, which would be expected for a right handed population ( Yielder et al, 2009 ) and grip strength was correlated with muscle mass ( Kallman et al, 1990 ). Nicolay and Walker (2005) speculated that the use of the dominant hand in daily activities may train muscle fibres towards the properties of fast-twitch fibres and more efficient control of intersegmental dynamics may also alter muscle development ( Bagesteiro and Sainburg, 2002 ).…”

Section: Discussionmentioning

confidence: 77%

Posture, Flexibility and Grip Strength in Horse Riders

Hobbs

Baxter

Broom³

et al. 2014

Journal of Human Kinetics

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Since the ability to train the horse to be ambidextrous is considered highly desirable, rider asymmetry is recognized as a negative trait. Acquired postural and functional asymmetry can originate from numerous anatomical regions, so it is difficult to suggest if any is developed due to riding. The aim of this study was therefore to assess symmetry of posture, strength and flexibility in a large population of riders and to determine whether typical traits exist due to riding. 127 right handed riders from the UK and USA were categorized according to years riding (in 20 year increments) and their competition level (using affiliated test levels). Leg length, grip strength and spinal posture were measured and recorded by a physiotherapist. Standing and sitting posture and trunk flexibility were measured with 3-D motion capture technology. Right-left differences were explored in relation to years riding and rider competitive experience. Significant anatomical asymmetry was found for the difference in standing acromion process height for a competition level (−0.07±1.50 cm Intro/Prelim; 0.02±1.31 cm Novice; 0.43±1.27 cm Elementary+; p=0.048) and for sitting iliac crest height for years riding (−0.23±1.36 cm Intro/Prelim; 0.01±1.50 cm Novice; 0.86±0.41 cm Elementary+; p=0.021). For functional asymmetry, a significant interaction was found for lateral bending ROM for years riding x competition level (p=0.047). The demands on dressage riders competing at higher levels may predispose these riders to a higher risk of developing asymmetry and potentially chronic back pain rather than improving their symmetry.

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Section: Discussionmentioning

confidence: 77%

Posture, Flexibility and Grip Strength in Horse Riders

Hobbs

Baxter

Broom³

et al. 2014

Journal of Human Kinetics

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“…The results of our study are consistent with these previous studies. Despite numerous studies to quantify the differences between the strength of the dominant and non-dominant hand (Jarjour et al, 1997;Zverev and Kamadyaapa, 2001;Yielder et al, 2009), this "10% rule" has been controversial (Petersen et al, 1989). Therefore, our study also analyzed the non-linear association between HGS ratio and cognitive score to explore more accurate U-shaped correlations.…”

Section: Discussionmentioning

confidence: 99%

Association between handgrip strength asymmetry and cognitive function across ethnicity in rural China: a cross-sectional study

Feng,

Ma,

Gao

et al. 2023

Front. Aging Neurosci.

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BackgroundRecently, the association between handgrip strength (HGS) asymmetry and cognition has been revealed, but evidences are still scarce. Particularly, the association between asymmetric HGS and cognitive performance in various cognitive domains is unclear and whether this association is stable across ethnic groups is unknown.MethodThe population was from a longitudinal study in rural areas of Fuxin, Liaoning, China. The Chinese version of Montreal Cognitive Assessment-Basic (MOCA-BC) was used to evaluate the cognitive function. The HGS ratio was calculated as maximal non-dominant HGS divided by maximal dominant HGS. HGS ratio <0.9 or >1.1 was classified as asymmetric dominant/non-dominant HGS, respectively. Generalized linear models were used to analyze the relationship between asymmetric HGS and cognitive function adjusted for HGS, handedness, wave, age, sex, education, ethnicity, smoking, drinking, physical labor level, BMI, hypertension, diabetes and dyslipidemia.ResultA total of 2,969 participants ≥50 years were included in this study. Adjusted for HGS and other confunding variables, there was an inverted U-shaped association between HGS ratio and MoCA-BC scores (Pnon–linear = 0.004). The association between HGS ratio and MoCA-BC scores was inconsistent among ethnic groups (Pinteraction = 0.048). In Han, only asymmetric non-dominant HGS was associated with lower cognitive scores [β = −0.67, 95% confidence interval (CI): −1.26 ∼−0.08, P = 0.027]; in Mongolians, asymmetric dominant HGS(β = −0.60, 95% CI: −1.35 ∼ 0.15, P = 0.115) and asymmetric non-dominant HGS (β = −0.56, 95% CI: −1.42 ∼ 0.31, P = 0.206) were all associated with lower cognitive scores, although no statistical significance was found. Asymmetric non-dominant HGS and lower HGS, but not asymmetric dominant HGS were all independently associated with impairment of Delayed Recall (OR = 1.35, 95% CI: 1.05 ∼ 1.74; OR per 5 kg decrease = 1.10, 95% CI: 1.01 ∼ 1.21) and Fluency (OR = 1.43, 95% CI: 1.15 ∼ 1.78; OR per 5 kg decrease = 1.10, 95% CI: 1.02 ∼ 1.19). Both asymmetric dominant HGS (OR = 1.34, 95% CI: 1.07 ∼ 1.67) and lower HGS (OR per 5 kg decrease = 1.21, 95% CI: 1.10 ∼ 1.32) were associated with impairment of visuoperception.ConclusionHGS and HGS asymmetry were all independently related to lower global cognitive performance. The association between HGS asymmetry and cognitive function varies among ethnic groups.

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“…The measurement protocol used the PRIMUS RS 701 tool (BTE Technologies, Hanover, MD, USA) [ 22 , 23 ], based on previous studies [ 24 , 25 ], where it is recommended to perform at least three different speeds between 30°–240°/s, and an increase of repetitions [ 26 ] as the evaluation speed increases. The isokinetic movements of each test (constant speeds) were performed continuously and without rest between flexion/extension or inversion/eversion movements.…”

Section: Methodsmentioning

confidence: 99%

Biomechanical Factors Predisposing to Knee Injuries in Junior Female Basketball Players

Mallada,

Beltrán,

Nuño

et al. 2024

Sports

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This cross-sectional observational study aims to determine isokinetic normality data at different speeds, and isometric data of ankle and knee joints, in healthy basketball players aged 15–16 years old. The participants were recruited through non-probabilistic convenience sampling. Sociodemographic, anthropometric, and biomechanical variables were collected. The study involved 42 participants. Right-leg dominance was higher in women (85.7%) than in men (78.6%). Men had a higher weight, height, and body mass index compared to women. Statistically significant differences were observed between sex and height (p < 0.001). Significant differences were found between sexes in knee flexor and extensor strength at different isokinetic speeds (30°, 120°, and 180°/s), except for the maximum peak strength knee flexion at 180°/s in the right leg. In the ankle, the variables inversion, eversion, and work strength values at different isokinetic speeds and full RoM, by sex, were not significantly different, except for the right (p = 0.004) and the left (p = 0.035) ankle full RoM. The study found lower knee extensor strength in women, indicating the need to improve knee flexor/extensor strength in women to match that of men, as seen in other joints. The results can guide the development of preventive and therapeutic interventions for lower limb injuries in basketball players.

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A possible anatomical and biomechanical explanation of the 10% rule used in the clinical assessment of prehensile hand movements and handed dominance

Cited by 5 publications

References 36 publications

Posture, Flexibility and Grip Strength in Horse Riders

Posture, Flexibility and Grip Strength in Horse Riders

Association between handgrip strength asymmetry and cognitive function across ethnicity in rural China: a cross-sectional study

Biomechanical Factors Predisposing to Knee Injuries in Junior Female Basketball Players

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