Send to

Choose Destination
Orthop J Sports Med. 2019 May 28;7(5):2325967119847978. doi: 10.1177/2325967119847978. eCollection 2019 May.

Relationship Between Lower Limb Tightness and Practice Time Among Adolescent Baseball Players With Symptomatic Osgood-Schlatter Disease.

Author information

Department of Orthopaedic Surgery, Graduate School of Medicine, Gunma University, Maebashi, Japan.



Osgood-Schlatter disease (OSD) is characterized by traction apophysitis of the tibial tuberosity. Few studies on symptomatic and asymptomatic OSD have correlated findings with clinical examination.


To investigate the relationship between lower limb tightness and practice time among adolescent baseball players with symptomatic OSD.

Study Design:

Cross-sectional study; Level of evidence, 3.


The study participants were 402 male baseball players (N = 804 knees) with a mean ± SD age of 10.9 ± 1.5 years (range, 7-14 years). Participant age, height, body weight, body mass index, practice time per week, range of motion of the hip and ankle joints, heel-buttock distance (HBD), and straight-legged raise angle were evaluated. Tibial tuberosity development, as assessed with ultrasonography, was classified into 4 stages: cartilaginous, apophyseal, epiphyseal, and bony. Knees that were classified as apophyseal or epiphyseal were investigated. Participants were divided into 3 groups: non-OSD, asymptomatic OSD, and symptomatic OSD.


Of 400 knees in the apophyseal and epiphyseal stages, 23 knees had asymptomatic OSD, and 11 had symptomatic OSD. Players with symptomatic OSD practiced for significantly longer than the non-OSD group (P = .001) and asymptomatic OSD group (P = .001). Players with symptomatic OSD also had a larger HBD (P = .006) and smaller range of motion regarding internal rotation of hip (P = .023) and dorsiflexion of the ankle (P = .013) than the non-OSD group.


Players with symptomatic OSD had longer practice times than the non-OSD and asymptomatic OSD players. Symptomatic OSD was also associated with tightness of the lower limbs as assessed by the HBD and range of motion in the hip and ankle joints.


adolescent baseball players; overuse; tibial tuberosity development; ultrasonography

Conflict of interest statement

The authors declared that there are no conflicts of interest in the authorship and publication of this contribution. AOSSM checks author disclosures against the Open Payments Database (OPD). AOSSM has not conducted an independent investigation on the OPD and disclaims any liability or responsibility relating thereto.

Supplemental Content

Full text links

Icon for PubMed Central
Loading ...
Support Center