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The purpose of this study was to investigate the relationship between lower limb muscle contractile properties and walking ability. We measured muscle contractile properties and the walking ability using a Tensiomyography (TMG) and a 6-axis IMU sensor accelerometer (GaitUp Physiology® 5) of young 25 adults. The measured data were subjected to stepwise multiple regression analysis with the muscle contractile parameters as the independent variable and the gait variables as the dependent variable. The results showed that the maximal displacement (Dm) which quantified muscle stiffness, and contraction time (Tc) which magnified the muscle contraction of each muscle were significantly correlated with the general, temporal, spatial gait parameters and foot kinematics. Also the muscle contractile parameters were identified as potential factors affecting walking performance. The results of this study suggest that improving muscle strength and muscle condition through proper strength training or rest may help improve walking ability. In addition, TMG could be considered to be effective as a methodology for predicting gait performance.