Musculoskeletal examination of junior high school students using a diagnostic ultrasound device: Investigation of Osgood-Schlatter disease and its related factors

Stretching exercises for growing children: evaluation of obesity, flexibility, pain and injury of musculoskeletal organs before and one year later

“…We observed obesity levels using BMI, which is widely used outside Japan, so a simple comparison cannot be made, but please refer to the percentage distribution. shows national data and results of previous studies on the prevalence of childhood obesity, pain, trauma, and flexibility in the bone and joint system as reference data 3 , 4 , 5 , 6 , 21 ) . Obesity rates (BMI over 25) increase with age among elementary school students 24 ) , but in this study, no significant difference was observed after one year.…”

“…Flexibility was lower in elementary school students than in junior high school students, consistent with other surveys in Japan 5 ) . Among children in athletic clubs, the proportion of children with low flexibility was even higher 6 ) . Considering this problem, interventions to improve flexibility from the elementary school age can prevent bone/joint pain and musculoskeletal disorders.…”

“…As a result, the muscles and tendons that attach to the bones become excessively tense, which may reduce flexibility and cause musculoskeletal disorders 2 ) . Since 2014, musculoskeletal examinations have been conducted on 380 elementary and junior high school students to investigate bone and joint pain, musculoskeletal disorders, and flexibility during growth 3 , 4 ) . As a result, 10–20% of elementary school students and 30–40% of junior high school students had bone and joint pain.…”

Analysis of Quadriceps Muscle Tightness as a Risk Factor for Osgood-Schlatter Disease: A Prospective Cohort Study

“…Reports of the incidence of OSD in studies with >100 participants have ranged widely from 2.9% to 12.9% in the previous cross-sectional studies. 1 , 2 , 7 , 8 , 10 , 11 , 12 In 2017, the German Olympic Sports Federation reported that the incidence of OSD varied according to type of sport, being highest in football players and high in basketball players. 3 In our study, the longitudinal observation of 140 Japanese adolescent male soccer players identified 6 cases of OSD (n = 8 knees), with an incidence of 2.9% (8/280) for knees and 4.3% (6/140) for players.…”

“…We suspect that the quadriceps muscle tightness becomes apparent after OSD onset. Several studies have evaluated the maturity of the tibial tuberosity in patients with OSD and found it to be mainly in the epiphyseal stage 7 , 10 , 11 or the apophyseal stage. 9 In our prospective study, ultrasound examination revealed that the tibial tuberosity was less mature in the OSD group than in the non-OSD group.…”