Grip Width Research Articles

Coming to grips with weight perception: Effects of grasp configuration on perceived heaviness

We investigated how changes in grasp configuration affect perceived heaviness in a weight discrimination task in which participants compared the weights of a series of test objects with the weight of a reference object. In different experiments, we varied the width of the grasp, the number of digits employed, the angle of the grasp surface, and the size of the contact area between the digits and the object. We show that objects are perceived to be lighter when lifting with (1) a wide grip in comparison with a narrow grip, (2) five digits in comparison with two digits, and (3) a large contact area in comparison with a small contact area. However, the angle of the contact surfaces did not influence perceived weight. We suggest that changes in central motor commands associated with grasp differences may influence perceived weight, at least under some conditions.

The influence of grip width on two-handed grip strengths in females

Nineteen female adults were tested for maximal voluntary contraction strengths of two-handed grip in a snap-type action at 11 different grip widths, ranging from 3.8 TO 16.5cm in increment of 1.2cm. The results indicated that the greatest strength was achieved at the smallest grip width and the weakest at the largest width. Also, strength declined linearly with increasing width at the rate of 18.5N per cm, and the strongest two-handed strength was 1.61 times as strong as standard one-handed power grip strength.Relevance to industryThe results of this study provide new data on grip strength that can be used for designing tasks and equipment, and for evaluating bilateral muscular efforts in manual gripping and squeezing tasks.

Electromyographic activity and applied load during shoulder rehabilitation exercises using elastic resistance.

Muscle activity (measured by electromyography) and applied load were measured during seven shoulder rehabilitation exercises done with an elastic resistance device. Nineteen men with no shoulder abnormalities performed seven exercises: external and internal rotation, forward punch, shoulder shrug, and seated rowing with a narrow, middle, and wide grip. Qualitative video (60 Hz) was synchronized with the electromyography data from eight muscles (2000 Hz). Fine-wire intramuscular electrodes were inserted into the supraspinatus and subscapularis muscles, and surface electrodes were placed over the anterior deltoid, infraspinatus, pectoralis major, latissimus dorsi, serratus anterior, and trapezius muscles. Ten trials per subject were analyzed for average and peak amplitude, and the results were expressed as a percentage of maximum voluntary contractions. The peak loads for all exercises ranged from 21 to 54 N. The muscle activity patterns suggest that these shoulder rehabilitation exercises incorporating elastic resistance, controlled movements, and low initial loading effectively target the rotator cuff and supporting musculature and are appropriate for postinjury and postoperative patients.

Effect of Grip Width on the Myoelectric Activity of the Prime Movers in the Bench Press

Effect of Grip Width on the Myoelectric Activity of the Prime Movers in the Bench Press

AN EMG COMPARISON OF MUSCLE RECRUITMENT ASSOCIATED WITH THE WIDE GRIP PULL-UP AND THE LAT PULL-DOWN EXERCISE 1592

The purpose of this study was to describe and compare the prime mover muscles used in the wide grip pull-up and lat pull-down exercises. Ten subjects performed the two exercises, using a resistance equal to their body weight for 3 sets of 3 repetitions, with 2 minutes rest between sets. The second repetition of each set was analyzed for each exercise. Research variables included phases (concentric, coupling and eccentric), exercises, trials, and muscles. The dependent variables were relative time to peak recruitment, peak recruitment, and phase time. Bipolar surface electrodes were used to record the EMG response of the latissimus dorsi, pectoralis major, anterior deltoid, trapezius, and biceps brachii. The EMG was synchronized with a video camera. The system provided integrated signals that were matched to the video. Findings revealed that the concentric and eccentric phases were slower (19.52% and 19.69%, respectively) for the lat pull-down than for the pull-up. The relative time to reach peak recruitment was shorter for the lat pull-down than for the pull-up (F(1, 192) = 11.12, p=.00). The magnitude of the peak EMG was the same for the pull-up and the lat-pull-down during the concentric phase (F(1, 216) = 0.41,p =.53) and different for the eccentric phase (F(4, 216)= 177.92, p =.00). These findings indicated that the two exercises are more different than alike with respect to the variables studied in this investigation.

Effect of Grip Width on the Myoelectric Activity of the Prime Movers in the Bench Press

ABSTRACTThe purpose of this study was to determine the effect of grip width on myoelectric activity of the pectoralis major, anterior deltoid, triceps brachii, and biceps brachii during a 1-RM bench press. Grip widths of 100,130,165, and 190% (G1, 2, 3, 4, respectively) of biacromial breadth were us

グリップ型握力測定装置の開発

The value of grip force is widely used for the brawn measurement in the physical strength examination because of its easy measurement. However, by use of the grip dynamometer being on the market, force is measured to only one direction, so it is doubtful whether various kinds of brawn can be measured. For example, the grip force to tennis racket seems to be different from the force measured by the grip dynamometer. Therefore, we developed the equipment to measure brawn gripping the cylindrical bject like tennis racket grip. Then we examined characteristics of both conven ional grip dynamometer and the newly developed equipment. As the result, for the ormer, grip width has an influence slightly on grip force, but, for the latter, grip iameter affects strongly as the human sense feels.

The Effect of Grip Width on Bench Press Performance

The purpose of this study was to determine the effects of grip width, chest depth, limb lengths, and bar path on the performance of a maximal bench press. Subjects were 24 experienced male weight trainers. Bench press performance was assessed at six different grip widths (G1–G6). Repeated-measures ANOVA with Tukey post hoc comparisons revealed that bench press strength values at the two moderate grip widths (G3 and G4) were significantly greater than either the narrow or wide grip widths. First-order partial correlations showed no significant relationship between strength values and anthropometric variables when adjusted for differences in body weight. Standard two-dimensional cinematographic procedures were used to film a subsample (n = 6) while bench pressing using G1, G3, and G6. The results of the statistical comparisons of bar path indicated that as grip width increased, the horizontal and vertical distance from the bar to the shoulder decreased.