The effect of age on force-time curve parameters of isometric grip strength trials
The Force-Time Curve (F-T Curve) Test includes the slopes of force-generation phase and force-decay phase of force-time curve generated when performing a 10-second isometric grip contraction. Previously, we have found the F-T Curve Test to be valid for measuring rehabilitation outcomes in people with upper extremity musculoskeletal conditions, and chronic pain conditions. However, it is not known how increasing age affects these slopes. The purpose of this study is to determine differences in the F-T Curve Test between healthy older adults (60-80 years) and middle age adults (35-50 years). Thirty older adults (15 men & 15 women) will perform 3 maximal grip efforts each with their dominant and nondominant hands. The slopes will be compared with those of thirty middle age adults (we already have data on 20 middle age adults). The slopes will be compared with ANOVA test with between subjects variables as age (middle vs. old), gender (men vs. women) and hands (dominant vs. nondominant).