A mechanically decoupled two force component bicycle pedal dynamometer

Newmiller, Jeff; Hull, Maury L.; Zajac, Felix E.

doi:10.1016/0021-9290(88)90144-3

Cited by 75 publications

(45 citation statements)

References 6 publications

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“…To acquire these data, a pedal dynamometer similar to that described by Newmiller et al (1988) was used. The dynamometer was modified to allow subjects to wear conventional clip-in cycling shoes, Weight was added to the opposite pedal to balance the inertial characteristics of the pedals.…”

Section: Methodsmentioning

confidence: 99%

Accuracy assessment of methods for determining hip movement in seated cycling

Neptune

Hull

1995

Journal of Biomechanics

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Section: Methodsmentioning

confidence: 99%

Accuracy assessment of methods for determining hip movement in seated cycling

Neptune

Hull

1995

Journal of Biomechanics

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“…The horizontal and vertical pedal forces from the right leg were measured with a pedal dynamometer designed by Newmiller et al (1988). The encoder and pedal force data were collected simultaneously with the video data at 100 Hz.…”

Section: Methodsmentioning

confidence: 99%

The association between negative muscle work and pedaling rate

Neptune

Herzog

1999

Journal of Biomechanics

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“…26 Reaction forces oriented normal and fore-and-aft to the pedal surfaces were measured by instrumented pedals. 27 The feet were firmly attached to foot plates on the pedal surface, which allowed the subjects to create shear and vertical forces. Angular rotation of the crank and pedals was measured by optical encoders.…”

Section: Methodsmentioning

confidence: 99%

Increased Workload Enhances Force Output During Pedaling Exercise in Persons With Poststroke Hemiplegia

Brown

Kautz

1998

Stroke

104

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Background and Purpose-A principle of poststroke rehabilitation is that effort should be avoided since it leads to increased spasticity and produces widespread associated abnormal reactions. Although weakness also contributes to movement dysfunction after a stroke, it has been feared that heightened activity levels during strength training will further exacerbate the abnormal tone imbalance present in spastic hemiplegia. The purpose of this study was to test this hypothesis by quantifying the effects of increased workload on motor performance during different speeds of pedaling exercise in persons with poststroke hemiplegia. Methods-Twelve healthy elderly subjects and 15 subjects with poststroke hemiplegia of greater than 6 months since onset were tested. The experimental protocol consisted of having subjects pedal at 12 randomly ordered workload and cadence combinations (45-J, 90-J, 135-J, and 180-J workloads at 25, 40, and 55 rpm). Pedal reaction forces were measured and used to calculate work done by each leg, including net positive and negative components. An electromyogram was recorded from seven leg muscles. Results-The main finding was that net mechanical work done by the plegic leg increased as workload increased in 75 of 81 instances without increasing the percentage of inappropriate muscle activity. Conclusions-This study provides evidence that persons with hemiplegia increase force output by their plegic limb when pedaling against higher workloads without exacerbation of impaired motor control. Therefore, exertional pedaling exercise is a beneficial intervention for achieving gains in muscular force output without worsening motor control impairments. (Stroke. 1998;29:598-606.)

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A mechanically decoupled two force component bicycle pedal dynamometer

Cited by 75 publications

References 6 publications

Accuracy assessment of methods for determining hip movement in seated cycling

Accuracy assessment of methods for determining hip movement in seated cycling

The association between negative muscle work and pedaling rate

Increased Workload Enhances Force Output During Pedaling Exercise in Persons With Poststroke Hemiplegia

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