Abstract
Objectives: The objectives of the study were to measure and compare handgrip strength using two instruments, Jamar® and Grippit® and to assess the validity and evaluate the test-retest reliability of each instrument. Thirty-four participants were recruited from University of Gothenburg, Sweden. Included were apparently healthy women, right handed and aged 20–29 years. Handgrip strength was measured with Jamar® and Grippit® on two occasions 4–11 days apart. Three measurements were made with each hand and instrument on two separate occasions. The test-retest reliability of both instruments showed very high correlations (ICC 0.87–0.95) and SRD% ranged from 12–15%. When comparing the results obtained from both instruments, high correlations (r = 0.78–0.83) were found between all the analysed variables. The test-retest reliability of both Jamar® and Grippit® was very high as was the concurrent validity between the two instruments.