%0 Journal Article %T Muscle endurance measurement using a progressive workload and a constant workload by maximal voluntary contraction %A Shinichi Demura %A Masakatsu Nakada %J Health %P 1255-1259 %@ 1949-5005 %D 2010 %I Scientific Research Publishing %R 10.4236/health.2010.211186 %X Muscle endurance measurement using a progressive workload method may reduce pain sensation in the subject. This study aimed to examine the relationships between force-time parameters during sustained static gripping as measured by maximal voluntary contraction (MVC) using either a progressive workload (PW) or a constant workload (CW). Sixteen subjects performed sustained static gripping with 7 gradually increasing relative demand values of 20% to 80% MVC and sustained static gripping by MVC. The staging of progressive workload was 10 s for 20% MVC, 20 s each for 30, 40, 50, 60, and 70% MVC, and 10 s for 80% MVC. The forces exerted at 120 s in the CW and PW methods were at around the 23-27% MVC level. Peak force, final force, and force during the last 30 s for the PW method evaluated muscle endurance after 1 min and showed high correlations (r = 0.746 ? 0.895). Significant correlations (r = 0.575 ? 0.605) were found between time to 40% MVC in the CW method and peak force, final force, and force in the last 30 s in the PW method group. The peak force in the PW method may be useful for evaluating muscle endurance with a short testing time and without high pain sensation. %K Sustained Static Gripping %K Progressive Workload %K Constant Workload %K Muscle Endurance %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=3087