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Muscle strength

YE Ylva B Ericsson
FM Fiona E McGuigan
KA Kristina E Akesson
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Isokinetic muscle strength in the knee extensors and flexors of the right leg was measured using a computerized dynamometer, Biodex System 3 [29]. Muscle strength was measured as concentric peak torque at the velocity of 60°/s in the range 10°-90° knee flexion. Participants were instructed to make a maximal effort, i.e. to push as hard as they could both in extension and in flexion, and verbal encouragement was given throughout. Participants completed one repetition with concentric extension and flexion to become familiar with the test. After the practice, five repetitions where completed. Peak torque (the highest value of the best repetition) was recorded, and results for knee extensors and knee flexors was reported both as absolute strength in Newton meter (Nm) and adjusted for body weight (%) according to the formula: peak torque (Nm)/weight (kg) x 100. The hamstrings-to-quadriceps strength ratio was calculated according to the formula: knee flexor strength (Nm)/ knee extensor strength (Nm).

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