TY - JOUR

T1 - Reference data for hop tests used in pediatric ACL injury rehabilitation

T2 - A cross-sectional study of healthy children

AU - Warming, Susan

AU - Alkjaer, Tine

AU - Herzog, Robert Bennike

AU - Lundgaard-Nielsen, Mathilde

AU - Zebis, Mette Kreutzfeldt

N1 - This article is protected by copyright. All rights reserved.

PY - 2021

Y1 - 2021

N2 - In rehabilitation, four single leg hop tests are frequently used for evaluation of ACL injured children. However, reference values on single leg hop performance and the corresponding limb symmetry indexes (LSIs) of healthy children younger than 15 years of age are lacking. Thus, the purpose was to describe hop performance and LSIs in healthy Danish children, and to quantify the proportion of participants passing LSI values of ≥85% as well as ≥90%. Healthy children aged 9-15 years were invited to participate in the study. Hop performance (single hop, 6-m timed hop, triple hop and cross-over hop) was assessed for each leg for each hop test and expressed as absolute, normalized (to body height) and LSI values. Descriptive statistics were applied to calculate mean ± SD for all outcomes within age and gender groups. Further, the 95% reference interval was calculated for each age and gender group. A total of 531 healthy children (52% girls) were included in the study, representing seven age groups (9 to 15 years). The LSI group means across all participants for the four hop tests ranged between 84-95%. Between 70 and 83% of the children had an LSI of ≥85%, while 50 to 65% of the children had an LSI of ≥90%. The present reference material can be used in clinical practice when evaluating hop performance in pediatric ACL patients.

AB - In rehabilitation, four single leg hop tests are frequently used for evaluation of ACL injured children. However, reference values on single leg hop performance and the corresponding limb symmetry indexes (LSIs) of healthy children younger than 15 years of age are lacking. Thus, the purpose was to describe hop performance and LSIs in healthy Danish children, and to quantify the proportion of participants passing LSI values of ≥85% as well as ≥90%. Healthy children aged 9-15 years were invited to participate in the study. Hop performance (single hop, 6-m timed hop, triple hop and cross-over hop) was assessed for each leg for each hop test and expressed as absolute, normalized (to body height) and LSI values. Descriptive statistics were applied to calculate mean ± SD for all outcomes within age and gender groups. Further, the 95% reference interval was calculated for each age and gender group. A total of 531 healthy children (52% girls) were included in the study, representing seven age groups (9 to 15 years). The LSI group means across all participants for the four hop tests ranged between 84-95%. Between 70 and 83% of the children had an LSI of ≥85%, while 50 to 65% of the children had an LSI of ≥90%. The present reference material can be used in clinical practice when evaluating hop performance in pediatric ACL patients.

U2 - 10.1111/sms.13986

DO - 10.1111/sms.13986

M3 - Journal article

C2 - 33963610

VL - 31

SP - 1832

EP - 1839

JO - Scandinavian Journal of Medicine & Science in Sports

JF - Scandinavian Journal of Medicine & Science in Sports

SN - 0905-7188

IS - 9

ER -