Strength and Flexibility of the Quadriceps Muscle in Adolescent Athletes with Osgood-Schlatter Disease.

Abstract

Žá "N ƒX ƒ| •[ ƒc 'I Žè ‚Ì Osgood-Schlatter •a ‚É ‚¨‚¯‚¨‚¯ ‚é 'å 'Ú Žl "ª ‹Ø ‚Ì ‹Ø-'r "c •_ •-1•• àV •®•-2•÷ 'ë OEi •A •-2 Abstract: In order to investigate the prevention of Osgood-Schlatter disease (OSD) in adolescent athletes, the strength and flexibility of the quadriceps muscles were examined in 30 adolescent athletes with unilateral OSD and 20 adolescent soccer players as a control. The following three factors were examined: 1) quadriceps strength in concentric and eccentric contraction, 2) quadriceps flexibility, and 3) the laterality of the involved knee. There was no significant difference in quadriceps muscle strength between athletes with OSD and soccer players, while quadriceps muscle flexibility in athletes with OSD was significantly low in comparison with soccer players. Although there was no significant difference in quadriceps muscle strength between the uninvolved and involved sides in our patients with unilateral OSD, the left knee was more prone to be affected than the right knee in adolescent athletes. In the great majority of adolescent athletes, the left knee had a tendency to be a dominant leg which was defined as the takeoff leg. Since the dominant leg is susceptible to eccentric quadriceps contraction during rapid deceleration while jumping, landing or running when playing sport, we consider that these factors may play a role in the decrease of the quadriceps muscle flexibility in adolescent athletes with OSD. With regard to the prevention of OSD, stretching exercises to relieve the decrease of the quadriceps muscle flexibility and training to reduce the load on the dominant leg are recommended in adolescent athletes. (Jpn J Rehabil Med 2001; 38: 827-831)-v Ž|: Žá "N ƒX ƒ| •[ ƒc 'I Žè ‚É ‚¨‚¯‚¨‚¯ ‚é Osgood-Schlatter •a (OSD) ‚Ì-\-h-@ ‚ð OEŸ "¢ ‚· ‚é ‚½ ‚ß 'å 'Ú Žl "ª ‹Ø ‚Ì ‹Ø-Í ‚AE ‚» ‚Ì •_ "î •« ‚ð 'ª 'è ‚µ ‚½. •Ð '¤ •«OSD‚Ì Žá "N 'j Žq ‚Å ‰Û ŠO ƒX ƒ| •[ ƒcŠˆ"ƒcŠˆ"® ‚ð•s ‚Á ‚Ä ‚¢ ‚½30-á (OSDOEQ) ‚Ì 'å 'Ú Žl "ª ‹Ø ‚Ì ‹Ø-Í ‚AE•_ "î •« ‚ðOEv 'ª ‚µ, OE' •í ‚È Žá "N ƒT ƒb ƒJ •[ 'I Žè 20-¼ (SOEQ) ‚AE"ä Šr OEŸ "¢ ‚µ ‚½. ‚Ü‚½OSDOEQ ‚Å ‚Í oeë Š³ '¤ ‚É ‚ ‚¢ ‚Ä ‚à'² •¸ ‚µ ‚½. OSDOEQ ‚AESOEQ ‚AE ‚ð "ä Šr ‚· ‚é ‚AE, 'å 'Ú Žl "ª ‹Ø ‚Ì ‹Ø-Í ‚É ‚Í-L ˆÓ •· ‚Í ‚È ‚- ,-¼ OEQ ŠÔ ‚Ì •· ‚ÍSOEQ ‚Å ‚Í 'S ‚-‚Ý ‚ç ‚ê ‚È ‚© ‚Á ‚½ 'å 'Ú Žl "ª ‹Ø ‚Ì •_ "î •« 'á ‰º ‚ªOSDOEQ ‚Ì Š³ '¤ ‚Å ‚Í •‚-¦ ‚É ‚Ý ‚ç ‚ê ‚½ ‚± ‚AE‚Å ‚ ‚Á ‚½. ‚Ü ‚½, OSDOEQ ‚Å ‚Í'å 'Ú Žl "ª ‹Ø ‚Ì ‹Ø-Í ‚ÉOE' •EŠ³ '¤ ŠÔ •· ‚ª ‚È ‚© ‚Á ‚½ ‚ª Š³ Žˆ‚Ì83%‚ªŽˆ‚Ì83%‚ª Ž² '« ‚Å ‚ ‚Á ‚½. ˆÈ •ã ‚Ì OE‹ ‰Ê ‚© ‚ç, OSD‚Ì-\-h ‚É ‚Í'å 'Ú Žl "ª ‹Ø ‚Ì •_ "î •« ‚ð'á ‰º ‚³‚¹ ‚È ‚¢ ‚½ ‚ß ‚Ì ƒX ƒg ƒOE ƒbƒ`ƒbƒ`ƒ" ƒO ‚AEŽ² '« ‚Ö ‚Ì •‰ ‰× OEy OE¸‚ÌOE¸‚Ì ‚½ ‚ß • ¶ ‰E ‚Ì ƒo ƒ‰ ƒ" ƒX ‚É "z-¶ ‚µ ‚½ ƒg ƒOE •[ ƒj ƒ" ƒO ‚ª •d-v ‚AE•l ‚¦ ‚é. (ƒŠ ƒnˆãƒnˆã Šw 2001; 38: 827-831)