Modern tennis rackets, balls, and surfaces Until the 1970s, tennis rackets were made out of wood—most commonly ash and beech. ... which prevents use of the plantar flexor muscles as shock absorbers.
BOLT - Tennis Racquet Innovation The Bolt tennis racquet is uniquely engineered for innovation you can feel. ... The fundamental principles of racquet design have not changed since the days of the ... ZipStrips act as shock absorbers, responding to ball impact before forces are&nbs
