A recent biomechanical study has identified the optimal grip for using high-speed steel (HSS) cutting knives by analyzing hand muscle activity.

The research found scientific validation for the traditional principle of holding the knife “firm yet relaxed.”

Using electromyography (EMG), the research team monitored the hand muscle activation patterns of skilled artisans while they used cutting knives.

Results showed that the optimal grip minimizes unnecessary muscle tension, reduces fatigue, and still provides sufficient control precision.

“Proper gripping isn’t about applying brute force—it’s about distributing effort efficiently,” explained the lead researcher. “We observed that experienced craftsmen naturally adopt more efficient biomechanical postures, leveraging the weight of their arm to generate cutting force rather than relying solely on hand muscles.”

Based on these findings, the researchers have developed a training protocol for HSS knife use to help beginners master proper technique more quickly.

The study also provides scientific guidance for ergonomic knife design—particularly in optimizing handle shape and surface texture.