title: Understanding the effect of speed of exertion on isokinetic strength using a multiaxial dynamometer.
abstract: In this study a multiaxial isokinetic dynamometer was used to measure strength during various upper-body isokinetic exertions. Ten male participants performed 7 different upper-body isokinetic exertions. In addition, to evaluate the effect of speed on strength, each participant performed sitting pull exertions at the speed of 0.026, 0.130, and 0.260 m/s. Average isokinetic strength increased from 236.6 +/- 39.1 to 291.8 +/- 65.8 N with the initial increase in speed from 0.026 to 0.130 m/s. The average isokinetic strength decreased to 276.7 +/- 87.2 N with a further increase in speed to 0.260 m/s. The curve between isokinetic strength and speed followed a bell-shaped curve (fitted with the Gaussian function, R(2) = .9). The results of this study could be useful in deciding on the work pace of various manual material handling tasks requiring maximal and/or near maximal exertions.
authors.affiliation: Department of Construction Management and Industrial Engineering, Louisiana State University, Baton Rouge, USA.
authors.forename: Ashish D
authors.initials: AD
authors.lastname: Nimbarte
authors.forename: Fereydoun
authors.initials: F
authors.lastname: Aghazadeh
authors.forename: Sai Chaitanya R
authors.initials: SC
authors.lastname: Bogolu
authors.forename: Sudhakar L
authors.initials: SL
authors.lastname: Rajulu
mesh_terms: D000328:Adult; D016552:Ergometry; D005080:Exercise Test / Q000379:methods*; D006801:Humans; D008297:Male; D009119:Muscle Contraction / Q000502:physiology; D018763:Muscle Fatigue / Q000502:physiology*; D053580:Muscle Strength / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D013647:Task Performance and Analysis