Elbow Load with Various Forearm Positions During One-Handed Pushup Exercise

Chou, Pei Hsi; Lin, Chii-Jeng; Chou, You-Li; Lou, Shu Zon; Su, Fong Chin; Huang, Gwo-Feng

doi:10.1055/s-2002-33745

Cited by 13 publications

(9 citation statements)

References 12 publications

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“…Many studies have established biomechanical kinematic and kinetic models of the upper extremity [2][3][4][5][6]. Furthermore, the effects of different types of push-ups on the degree of muscle activation have also been reported.…”

Section: Introductionmentioning

confidence: 99%

Untitled

Hsu¹

2011

J. Med. Biol. Eng.

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Push-up exercises are commonly performed to strengthen the upper extremity muscles. However, the relationship between the push-up speed and upper extremity fatigue is not well understood. Accordingly, the present study investigated the effect of the push-up speed on the maximum possible number of push-up repetitions until fatigue and the upper-extremity muscle activity, respectively, in order to identify suitable push-up strategies for upper-extremity muscular strengthening. Fifteen healthy males participated in the study. Each subject performed push-ups at three different speeds (i.e., fast: 7 push-ups/10 s; regular: 5 push-ups/10 s; and slow: 4 push-ups/10 s) until fatigued. The muscle activity signals were measured during the push-up tests via surface electromyography. The strengthening effect of the push-up exercises was evaluated by measuring the myodynamic decline rate at the shoulder, elbow and wrist joints using an isokinetic dynamometer. The results showed that the maximum possible number of push-up repetitions at the fast push-up speed was around 1.34 and 1.33 times higher than that at the regular push-up speed or slow push-up speed, respectively. However, the endurance time (i.e., the time to fatigue) at the slow push-up speed was around 1.20 and 1.24 times longer than that at the fast push-up speed or regular push-up speed, respectively. Finally, at the slow push-up speed, the total muscle activations in the triceps brachii, biceps brachii, anterior deltoid, pectoralis major, and posterior deltoid, respectively, were 1.47, 2.43, 1.42, 1.48, and 1.91 times higher than those at the fast push-up speed. Therefore, the experimental results suggest that push-ups should be performed at a faster speed when the aim is to achieve a certain number of repetitions, but should be performed at a slower speed when the aim is to strengthen the upper extremity muscles.

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Section: Introductionmentioning

confidence: 99%

Untitled

Hsu¹

2011

J. Med. Biol. Eng.

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“…He stated that in the flexed position, the elbow acts as a fulcrum, and force transmitted through it in this position can result in trochlear fracture. Biomechanical studies also suggest that the direction of forces acting over the ulno-trochlear articulation vary with the degree of flexion of the elbow and forearm position 13,14 .Eckstein showed that, at 30 0 flexion ventral contact area in elbow is significantly greater than the dorsal contact area 15 .Hence it can be postulated that axial loading in flexed position would transmit the forces along the ventral surface of trochlea through the coronoid.…”

Section: Casementioning

confidence: 99%

Isolated Fracture of the Trochlea: Report of Two Cases With Review of the Literature on the Mechanism of Injury

Dhurve¹,

Patil²,

Chandanwale³

et al. 2013

jemds

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“…Various biomechanical models of the upper extremity have been proposed for investigating kinematic parameters under simulated fall conditions or in upper-extremity training exercises [12][13][14][15][16]. These models have proven useful in investigating potential injury mechanisms in the event of a fall onto an outstretched hand.…”

Section: Introductionmentioning

confidence: 99%

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et al. 2012

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This study explores the effect of exercise-induced fatigue on upper extremity stability. The kinematic changes of the upper extremity during bench-press exercise are quantified by measuring the flexion angle and range of motion of the elbow joint, the amplitude of the pitch angle, the amplitude of the yaw angle, and the perturbation frequencies of the pitch and yaw angles, respectively. Fifteen healthy males performed bench presses until fatigue set in. The joint kinematics in the initial stage and the fatigue stage of the bench-press exercise are calculated and analyzed using a laboratory-developed three-dimensional motion analysis system. The flexion angle and range of motion of the elbow joint are significantly higher in the initial stage of the bench-press exercise than in the fatigue stage. The amplitude of the pitch angle in the fatigue stage (mean 11.98°, standard deviation (SD) 3.52°) is significantly higher than that in the initial stage (mean 2.85°, SD 1.13°). The amplitude of the yaw angle in the fatigue stage (mean 8.87°, SD 2.05°) is significantly higher than that in the initial stage (mean 3.27°, SD 1.70°). Finally, the perturbation frequencies of the pitch and yaw angles, respectively, are both significantly higher in the fatigue stage than in the initial stage. The results provide useful insight into the relationship between fatigue-induced perturbation frequency and the instability of the upper extremity during bench-press exercise. An unstable upper extremity posture may increase the risk of injury during the fatigue stage of repetitive exercise.

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Elbow Load with Various Forearm Positions During One-Handed Pushup Exercise

Cited by 13 publications

References 12 publications

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Isolated Fracture of the Trochlea: Report of Two Cases With Review of the Literature on the Mechanism of Injury

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