Table 5. Values of EMG RMS (mean ± SD) (µV) obtained from the vastus lateralis and vastus medialis muscles during the maximal isometric voluntary contractions (MVCs) performed before and after the incremental test for the oval Q-rings and the conventional rings (C-rings). Q-ring C-ring Before incremental test After incremental test Before incremental test After incremental test Vastus Lateralis 1st MVC 991 (137) 813 (117) 1091 (124) 768 (98) 2nd MVC 757 (112) 661 (95) 808 (112) 678 (94) 3rd MVC 841 (124) 670 (105) 783 (105) 694 (102) 4th MVC 858 (115) 678 (123) 864 (114) 771 (114) Vastus Medialis 1st MVC 1120 (158) 768 (127) 1191 (135) 940 (123) 2nd MVC 819 (134) 661 (123) 937 (122) 778 (102) 3rd MVC 799 (126) 712 (122) 1032 (142) 767 (112) 4th MVC 872 (129) 774 (120) 1059 (126) 764 (123)