The HUMAC360 is a small box that offers big results. Measuring 4” x 4” x 4” and weighing just 4 pounds, the HUMAC360 attaches to any patient or exercise equipment in seconds, using a 16’ retractable nylon belt. When the belt is pulled the HUMAC Software reports velocity, distance, and if a weight is recorded, power. These functional parameters are displayed on the screen for proper pacing and distance and in reports for evidence based rehabilitation. It could not be easier.Read the Full Story
Greenfield et al (1990) and Perrin (1986) have demonstrated that internal and external rotation of the shoulder show greater reliability than flexion and extension. The reliability of shoulder extension and flexion testing is best when performed in a neutral position with reliability decreasing with shoulder abduction (Chan and Maffoulli, 1996). Trunk stabilization is important for reliable measures but nay have to be compromised for subjects safety (Frisiello et al, 1994).
Very high reliability as established by Kannus (1994). However, eccentric testing shows greater variability than concentric testing (Kramer, 1990).
Correlation coefficients for concentric actions vary from 0.67-0.94 with little data available for eccentric actions (Cawthorn et al, 1991, Wennerberg, 1991, Karnofel et al, 1989).
Lower reliability probably due to small ROM and torque production (thus variations in small torque values are obviously magnified particularly if the dynamometer does not register decimal places) (Chan and Maffulli, 1996).
Low reliability probably due to large ROM (Chan and Maffulli, 1996) However, Suomi et al (1993) did find correlation coefficients between 0.98 and 0.99 for hip abduction testing.
Low reliability 0.72-0.83 (Griffin, 1987).
In short Chan and Maffuli (1996) have concluded that more advanced isokinetic machines do not produce higher reliability. Variables with greater numerical values e.g. peak torque of the knee show higher reliability than ones with lower values e.g. peak torque of the elbow and concentric results show greater reliability than eccentric ones.