ISOMETRIC^TM technology continues to help the world’s greatest players achieve global success.

Developed over 30 years ago, the ISOMETRIC^TM design increases the sweet spot by 7%*. Compared to a conventional round frame, a square-shaped ISOMETRIC^TM racquet generates a larger sweet spot by optimizing the intersection of the main and cross strings.

ISOMETRIC^TM delivers greater control without sacrificing power. ISOMETRIC^TM is a Trademark of Yonex CO., LTD.
*Tested by Yonex

MUSCLE POWER Frame

Unity of String & Frame

Muscle Power locates the string on rounded archways that eliminate stress-load and fatigue through contact friction. This construction creates total unity of the string and frame through closer and tighter contact.