Technical Tennis
キーフレーズ
Racquet Stiffness Racquet Power Racquet Speed Racquet Weight 旧 e Racquet Wh0t racquet PERFECT RACQUET Racquet Vibrations Racquet Head kind of racquet CUSTOMIZINGA RACQUET Types of Racquet Racquet Features Racquet Tech Publishing Racquet Tech PubIishing ofAII Racquet Properties e な Maximum Exit Power Point f 加 world's Dynamic Stringbed Stiffness 四加厮 e e 卸 f principles f 加席 Rebound Speed f tennis physics Match Point Box 凵 ー RACQUETS Effort Power n imp BaIance Point t わ e SP れ合 n ロ日ロリ n こ E Traiectory Match Point Box difference tennis ball direction string plane ball speed racquet head hitthe ball longer time Chapter Fo 町 vibration ln general revolutions heavier racquet ball bounces long axis impact point stringbed stiffness racquet face gram racquet string tension stationary racquet racquet speed shorter time professionals roughness steeper angle horizontal speed right angles vertical axis likely t0 tennis balls ball speed swinging t ofthis num incoming ball terms unpredictable bounces winner Tall players speed of ロ mph answer AII modern collision land short 飢 of power Lowe r JöM0d pu コ 0q9 区 Tighter stringsnooser strings SPINANDTHE ducing energy attempt slippery surface gauge effect LOW pressure caveat cross strings Magnus force r05 Ball toss recreational players interpreta GENERATION OF SPIN stringbed support目次
Contents The Six 、、、 Weights" of a Racquet . Racquet Weight Light vs Heavy Racquets 旧 e Racquet 、 Weight BaIance Point and Pickupweight Swingweight Twistweight . Spinweight Hiftingweight ( 、、 Effective Mass") STIFFNESS (FLEX) . Racquet Stiffness . Measuring Racquet Stiffness . Match Point Box l.4:Vibration Comparison between Racquets .. 46 Racquet Vibrations, Sweetspot, and Feel .. 48 Vibration Dampening .. 50 Shock & the Center of Percusson .. 引 Match Point Box l.5:The Difference between Shock and Vibration CUSTOMIZINGA RACQUET ... 56 Match Point Box l.6: Customizing Weight, Balance, & Swingweight .. 57 Further Reading .. 58 STRINGS .. 22 STRINGSAND THE MODERN GAME .. 59 .24 .25 STRINGBED STIFFNESS Static & Dynamic Stringbed Stiffness .62 Effect of String Materialand Gauge on Stringbed Stiffness Effect of StringTension on Stringbed Stiffness . Effect of String Pattern on Stringbed Stiffness . Effect of Headsize and Stringbed Suspension System on Stringbed Stiffness FOREWORD . PREFACE ー RACQUETS INTRODUCTION Choosing a Racquet—the Basics Mistakes When Buying a Racquet Three Types of Racquet . Racquets and Player Psych010gy Racquet Features Combine with Strokes Selecting a Racquetls Art & Science ... 9 Care of Racquets RACQUET PROPERTIES . POWER The Components of 、、 Power": Exit Speed, Rebound Speed, Racquet Speed Match Point Box 凵 : Effect of Grip Firmness The Maximum Exit Power Point Changes with Racquet Speed Comparing Racquet Power . Racquet Power Defined as Rebound Power Match Point Box l.2: Maximum Effort Power . Rebound Powerls the Sum ofAII Racquet Properties . Power and Energy Loss Match Point Box l.3: Maximum Theoretical BaII Speed . 25 The Bad News: Rebound PowerValues Aren't Readily AvaiIabIe .. 26 CONTROL . Rebound Control WEIGHT Weight and Apparent 、 Weight 8 0 「 ) 4 ー 8 っムつ」 . V っコっ LO -4 4 ー 5 ) 4- 4 ・ 4 ・ .. 55 .. 66 . .68 .. 27 . 27 . .28 .. 28
Contents BALL BOUNCE OFF THE STRINGS Angle oflmpact TiIting the Racquet Head TENSIONAND The Bounce Path 0 仟 the Strings ・・ 74 PERFORMANCE ん「 t わ e 「 Reading . 75 Tension and PO 、 wer . S 円 N & Tension Loss and G0ing 、、 Dead" 77 78 Tension Loss and Feel TRAJECTORY Tension Loss and Control . 79 Tension Loss and Sound 79 SPIN BASICS . 79 Tension LOSS and Prestreteching Generation Of Spin .80 Tension and Spin lnfiuence of lncident Angle and Spin .80 Tension and Player Perceptiveness . on Rebound Spin Match Point Box 4 上 Effects of Spin DWELLTIMEAND on Bounce Offthe Strings PERFORMANCE Types and Uses of Spin Dwell Time 田 DifferentWays to Hit the Ball Dwell Distance . Spin Before and After Bounce . Dwell Error . Effect of Grip on Spin Dwell Time and Force . Can Racquets and Strings General Rules of Dwell Time lncrease Spin? Further Reading Match Point Box 4.2 : Can Players Feel Spin BALLS & lncreasing Spin with BOUNCE StrokeTechnique . SimpleTopspin Experiment . BALL BASICS Match Point Box 4.3:Topspin and BaII History the Federer Forehand . Rules about Balls Effect of Racquet Tilt on Match Point Box 3 」 : Ball Testing aTopspin Forehand . to Compare New and 〇旧 Balls . .. 89 Pressurized and Pressureless BaIIs .. 90 SPINANDTHE SERVE . Ball Toss BALL BOUNCE OFF Tips on Serving THE COURT Arching the Back to Serve Friction . Slice Serve . Bounce Factors . Serve Actions . Bounce Factor # に Forearm SIOWS DOMv ・ n . Angle of lncidence . Match Point Box 4.4:The Bounce Factor # 2 : Sampras Serve . lncident Speed and Spin Force on Handle Bounce Factor # 3 : .. 96 TRAJECTORY . Hardness of Court Vertical Launch Angle Bounce Factor # 4 : .. 98 Hitting the Ball Deep . Court Smoothness or Roughness . .. 99 Further Reading Horizontal Bounce Speed Effects of Friction on Ball Spin 」 02 Match Point Box 2 」 : Rise in String Tension During a Shot Stringbed Stiffness Summary 」 08 」 09 . 72 73 . 」 20 . 」 23 」 26 . 」 27 . 」 28 2 っム 4 ・ L.n に ) ′ 6 6 8 CO - CO -8 一 -8 8 . 」 30 . 」 32 . 」 33 8 8 」 34 」 37 . 」 39 . 」 39 . 」 40 」 42 」 44 . 」 44 」 45 0 9 9 】 .. 94 . 」 46 」 47 . 」 48 . 」 48 」 50 . 」 52 .. 95
奥付
Copyright ◎ 2005 by Rod Cross and C 「 aw 「 0 「 d Lindsey Racquet Tech Publishing ()n imp 「 int ofthe USRSA) 330 Main St. Vista, Ca 鼾 0 「 nia 92084 WWW. racquettech.com All rights reserved. No pa け ofthis publication may be reproduced, stored in 0 retrieval system, 0 「 transmitted, in any form 0 「 by any means, elec- tronic, mechanical, photocopying, recording 0 「 otherwise, withOUt the express written consent Ofthe publisher. Library of Congress Control Number: 2005905393 Cover design and illustrations by Kristine Thom lnside chapter title photos by Ron Waite, Ph0tosportacular Printed in the United States Of America ISBN-1 3 : 9 / 8-0-9 / 22 / -593-4 ISBN-10 : 0-9 / 22 / 59-3-2