The purpose of this study was to discuss stroking performance on the kayak. There are 30 subjects participate in this study, and subject was required to take stroking kayak ergometer test. A subject was measured through the control software National Instruments LabVIEW in the computer connected to the new magnet-control kayak. After that, each subject will take a break until their energy was fully recovered before beginning to take testing, in which the stroking frequency is 80 times per minute, and there are 8 stages with every 15 seconds per stage The results of the experiment illustrate in the two-minute test which mocks 500-meter stroking competition, the average stroking impulse of variable resistance was 404.5±119.23 kgf per second. Thus can see the performance in stroking impulse from variable resistance kayak ergometer.