MUSCLE POWER FRAME for high-level control

Frame Aluminum
Shaft Steel
Weight / Grip U (105g and below) G4
Stringing Advice
U: 16 - 20 lbs



ISOMETRIC
Enlarged Sweet Spot

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

ISOMETRICTM delivers greater control without sacrificing power. ISOMETRICTM 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.