Secrets of Judo. Jiichi Watanabe

170 7. Hadaka-jime (bare-hand strangle): 172 8. Ryote-jime (two-hand strangle): 174 Explanation of kansetsu-waza (elbow locks and twists): 176 1. Hiza-gatame (knee-elbow lock): 176 2. Juji-gatame (cross armlock): 178 3. Ude-garami (entangled armlock): 180 Index 783

      Illustrations

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1. Nervous system:	26
2. Reaction time:	28
3. Unconditioned reflex:	29
4. Conditioned reflex:	29
5. Object and image:	32
6. Gravity and weight:	37
7. Center of gravity of a standing object:	37
8. Center of gravity of a suspended object:	37
9. Finding the center of gravity in a triangle:	38
10. Finding the center of gravity in a trapezoid:	38
11. Center of gravity and stability of a standing object:	39
12. Center of gravity and instability of a standing object:	39
13. Relative stability of standing objects:	39
14. Right natural posture (migi-skizen-tai):	41
15. Main natural posture (shizen-hontai):	41
16. Center of gravity in main natural posture:	41
17. Stability of main natural posture:	41
18. Main defending posture (jigo-hontai) and its stability:	41
19. Hiza-guruma (knee wheel):	41
20. Kuzushi (off-balancing):	41
21. Happo-no-kiiziishi (eight directions of off-balancing):	43
22. Dynamic coordination:	48
23. Coordination of forces:	48
24. Uki-otoshi (floating drop):	49
25. Combination of forces increases speed:	49
26. Right-triangle sitting position:	52
27. Right-triangle standing position:	52
28. Right-triangle kneeling position:	53
29. Stepping forward in right-triangle position:	53
30. Improper posture hampers use of abdominal force:	55
31. Defending posture does not permit quick movement:	55
32. Law of reaction:	62
33. Law of reaction:	63
34. Kicking force K produces reaction force F:	63
35. Force of momentum:	66
36. Force of friction:	66
37. Muscular contraction:	67
38. Partial and total muscular force:	67
39. Using force of gravity to assist in a throw:	69
40. Center of gravity at fulcrum:	69
41. Momentum plus muscular force beats muscular force alone:	71
42. Momentum supplements muscular force in a throw:	71
43. Impulse and impulsive force:	72
44. Harai-goshi: less effective means of inducing momentum:	74
45. Harai-goshi: more effective means of inducing momentum:	74
46. Friction varies with weight:	76
47. Friction assists in defense against a throw:	78
48. Transmissibility of force:	81
49. Transmissibility of force:	83
50. Parallelogram of forces:	83
51. Composition of forces in a throw:	83
52. Decomposition of forces:	85
53. Modified kami-shiho-gatame uses larger vertical component:	85