We examined neuromuscular reactions in the forearm flexor and extensor muscles during low-to-medium grip tasks while wearing a sports wristband, incorporating additional stimuli with varying directions. The frequency component of the flexor muscle was increased by longitudinal stimuli, and extensor muscle activity was decreased regardless of stimulus directionality. These responses were exclusively observed in the low-intensity grip task. Our findings provide insight into stimulus directionality and task intensity dependency of neuromuscular responses based on wearing devices, contributing to reassessment and design of functional wear.