Bulletin Autumn‧Winter 1998

i n j u r e d knee was scored u s i n g the C i n c i n n a ti R a t i n g S y s t em w h i c h grades i t ems s u c h as the severity of p a i n a n d swelling, the degree of g i v i n g w a y , i.e., a s u d d e n loss of stability, a n d the o v e r a ll a b i l i t y to w a l k , r u n , ascend a n d descend steps, j u m p , a n d twist . T he results s h o w e d t h a t a ll v a r i a b l es i n v o l v i n g h a m s t r i n g s t r e n g t h w e r e s i g n i f i c a n t ly c o r r e l a t ed to t h e f u n c t i o n a l a b i l i ty score, whereas n o n e of th e variables i n v o l v i n g q u a d r i c e p s t r e n g t h s h o w e d s i g n i f i c a nt c o r r e l a t i o n w i t h the f u n c t i o n a l ability of the i n j u r ed knee. T h e conclusion is that H : Q rati o can be u s ed as a n a d d i t i o n a l m e a s u r e i n t h e d e c i s i o n - m a k i n g process w h e n m a n a g i ng anterior-cruciate l i g ame nt d e f i c i e n t k n e es i n C h i n e s e r e c r e a t i o n al athletes. B i l a t e r a l I s o k i n e t ic V a r i a b l es o f t h e S h o u l d er Clinicians f r e q u e n t ly w a n t to k n o w th e p r e - i n j u r y s t r e n g th of a n i n j u r e d l i m b . C a n i t b e p r e d i c t e d u s i n g t h e s t r e n g t h o f a n u n i n j u r ed l i mb ? T h is s t u d y tries to f i n d o u t b y e x am i n i ng a similar s i t u a t i o n—u s i ng the s t r e n g th of one s h o u l d e r to d e t e r m i n e that of the other. Since i n mo s t people, one s h o u l d e r is u s e d m o r e o f t en t h a n the other, e.g., left for left-handers a n d so on, the d o m i n a n t s h o u l d e r s h o u ld h a ve better muscle p e r f o r ma n c e t h a n the non-dominant one. T h e s t u d y b e g a n b y d e l i n e a t i ng t h e differences i n muscl e p e r f o r ma n ce b e t w e e n the t w o shoulders o f 30 male subjects d u r i ng s h o u l d e r extension a n d f l e x i o n mo v eme n t s , a n d s u b s e q u e n t ly d e v e l o p ed a m e t h o d to d e t e r m i n e t h e m u s c l e p e r f o r m a n c e o f t h e d o m i n a n t s h o u l d e r , b a s e d u p o n t h e m e a s u r e m e n ts f r o m t h e n o n - d o m i n a n t s h o u l d e r . T h e results suggest a s i g n i f i c a n t correlation b e t w e en the d o m i n a n t a n d n o n - d om i n a n t sides, w i t h a significant difference, i.e. a c o n s t a nt d i f f e r e n c e i n m u s c le p e r f o r m a n c e b e t we en th e t w o shoulders t h o u gh i t varies w i t h the same rate of change. T he r e s u l t s of t h e s t u d y i n d i c a t e t h a t i t is i n a p p r o p r i a te to use the u n i n j u r ed s h o u l d er t o p r e d i c t the p r e - i n j u r ed s t r e n g th of th e i n j u r ed side w i t h o u t a ny adjustment . I n this i n v e s t i g a t i o n , m o d e l s w e r e d e v e l o p e d r e l a t i ng t he e x p e c t ed m a x i m a l i s o k i n e t ic m e a s u r e m e n t o f t h e d o m i n a n t s h o u l d er t o the n o n - d o m i n a n t shoulder measurements. I s o k i n e t ic P r o f i l e o f D o r s i f l e x o r s a n d P l a n t a r F l exo r s o f t he A n k l e —a C o m p a r a t i ve S t u d y o f E l i t e v e r s us U n t r a i n ed Su b j e c ts T h e r e s e a r c h e r s also c o n d u c t e d a comparative s p e c i f i c a l l y the p l a n t a r - f l e x i on a n d d o r s i f l e x i o n , i n 23 t r a i n e d a n d 25 u n t r a i n ed y o u n g men. T h e t r a i n ed subjects c omp r i s ed six cyclists, seven g ymn a s t s , a n d 10 soccer p l a y e r s. P l a n t a r f l e x i o n is t h e a c t i o n o f b e n d i n g the foot so that the angle b e t w e e n t h d o r s al side o f th e f o o t a n d the l e g is Chinese University Bulletin Autumn • Winter 1998 36