Accuracy and reliability of a method for measuring three-dimensional articular motions of the shoulder complex during swimming

Du, Tanghuizi; Yanai, Toshimasa

doi:10.1080/14763141.2019.1702089

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…Contrary to our initial hypotheses, our swimmers did not present increased clavicular elevation when compared to controls. In our study, shoulder kinematics was evaluated up to 120° of humeral elevation, while the hand entry for freestyle requires an arm elevation of 150° (Du & Yanai, 2016). The lack of clavicular kinematic adaptations until 120° of humeral elevation may not augur any adaptations for higher humeral elevation.…”

Section: Discussionmentioning

confidence: 99%

“…The catch phase occurs from the hand entry in the water, during which the shoulder is elevated to reach forward maximally (Yanai & Hay, 2000). Then the pull phase demands powerful humeral adduction, internal rotation and extension (Du & Yanai, 2016; Pink et al., 1991). Finally, the recovery phase is achieved by a humeral abduction and external rotation to place the hand forward for the following arm entry (Yanai & Hay, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Then the pull phase demands powerful humeral adduction, internal rotation and extension (Du & Yanai, 2016;Pink et al, 1991). Finally, the recovery phase is achieved by a humeral abduction and external rotation to place the hand forward for the following arm entry (Yanai & Hay, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Scapular kinematics during scaption in competitive swimmers

Blache

Gillet

Selin

et al. 2018

European Journal of Sport Science

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This study aimed (1) to describe and compare scapular kinematics between three groups of swimmers of different levels and a group of non-swimmers, and (2) to assess whether swimming practice alters the asymmetries in scapular kinematics between the dominant and non-dominant sides, both during unilateral arm raising and lowering in the scapular plane. Scapular kinematics were assessed bilaterally during arm raising and lowering in the scapular plane using an electromagnetic system in 42 healthy males, which were split into four groups: control (n = 11), adolescent elite swimmers (n = 11), adult elite swimmers (n = 10), and club-level adult swimmers (n = 10). One-Way ANOVA SPM(t) on two repeated measures showed that the three groups of swimmers had more protracted shoulder between 30° and 90° of arm raising and lowering (p < .001). The three groups of swimmers presented no bilateral difference in scapular upward rotation, while the dominant scapula was more upwardly rotated than the non-dominant one between 74° and 104° of arm elevation in the control group (p < .001). The scapula of adult elite swimmers was more internally rotated between 67° and 116° of humeral elevation during arm raising, and between 81° and 54° during arm lowering in comparison to the other swimming and control groups (p ≤ .02), who presented similar scapular positioning in internal rotation. In conclusion, the findings of the study pointed out that swimming practice generated protracted shoulders and removed bilateral differences in scapular upward rotation during scaption, while accumulation of swimming practice at elite level enlarged scapular internal rotation.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Scapular kinematics during scaption in competitive swimmers

Blache

Gillet

Selin

et al. 2018

European Journal of Sport Science

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“…The device can track the sensor's location and orientation in six degrees of freedom within the magnetic field generated by a source at 240 Hz. This device is widely used in the medical and sports fields [13][14][15] . Given that it is easily operated and can be used without visual information, when the participant leans on the backrest of a chair or sofa, sensors hidden on the backside of the body can be tracked efficiently.…”

Section: Body Posture Measurementmentioning

confidence: 99%

Relationship between using tables, chairs, and computers and improper postures when doing VDT work in work from home

Iwakiri

Sotoyama

et al. 2022

INDUSTRIAL HEALTH

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This study focused on everyday furniture and computers used in work from home and aimed to investigate how improper postures increase the risk of musculoskeletal disorders using different combinations of tables, chairs, and computers. Twenty-one healthy participants were asked to perform a visual display terminal task for 30 minutes in a laboratory modeled on the work from home concept. Seven experimental conditions were set up according to the different combinations of desks, chairs, and computers. Three-dimensional body posture was measured using a magnetic tracking device. The results showed that when using a low table, floor chair, and laptop computer, the body posture above the hip was similar to that when using a dining table, chair, and desktop computer. When using a sofa, and tablet computers, or laptop computer, severe neck flexion, which is stressful to the neck, was observed. Moreover, excessive low back flexion was observed when using a floor cushion and laptop computer. We suggest that computer work while sitting on a sofa or floor cushion without a backrest is harmful to the neck and low back.

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