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Isokinetic peak torque ratios and shoulder injury history in adolescent female volleyball athletes.
J Athl Train. 2008 Oct-Dec; 43(6):571-7.JA

Abstract

CONTEXT

Few researchers have examined shoulder strength in adolescent volleyball athletes despite increasing levels of participation in this age group.

OBJECTIVE

To compare medial and lateral isokinetic peak torque of the rotator cuff among skill levels and between athletes with and without a history of shoulder injury.

DESIGN

Cross-sectional design.

SETTING

The Human Performance Lab and Athletic Training Lab.

PATIENTS OR OTHER PARTICIPANTS

Thirty-eight female adolescent club volleyball athletes from 10 to 15 years of age (mean = 13.02 +/- 1.60 years).

MAIN OUTCOME MEASURE(S)

We measured concentric and eccentric peak torque of the medial and lateral rotators of the shoulder and calculated resultant cocking and spiking ratios based on peak torque values.

RESULTS

Athletes at higher skill levels had higher peak torque measurements in concentric and eccentric medial and lateral rotation compared with the athletes at lower skill levels. No differences in peak torque existed between participants with or without an injury history 6 months before the study. Strength ratios did not differ across skill levels, but previously injured participants produced lower eccentric medial rotation to concentric lateral rotation ratios compared with participants without a history of injury (P = .02). At the highest skill level, previously injured participants produced lower eccentric lateral rotation to concentric medial rotation ratios compared with participants without an injury history (P = .04).

CONCLUSIONS

Differences in medial and lateral shoulder rotator strength ratios appear to be related more to injury prevalence than to absolute strength. Shoulder dysfunction related to strength ratio deficits also may exist in adolescent female volleyball athletes. Preventive shoulder strengthening programs focused on improving eccentric strength and correcting imbalances between medial and lateral rotators may be warranted for all female adolescent volleyball athletes.

Authors+Show Affiliations

University of Hawai'i at Mānoa, Honolulu, HI 96822, USA. cstickle@hawaii.eduNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

19030134

Citation

Stickley, Christopher D., et al. "Isokinetic Peak Torque Ratios and Shoulder Injury History in Adolescent Female Volleyball Athletes." Journal of Athletic Training, vol. 43, no. 6, 2008, pp. 571-7.
Stickley CD, Hetzler RK, Freemyer BG, et al. Isokinetic peak torque ratios and shoulder injury history in adolescent female volleyball athletes. J Athl Train. 2008;43(6):571-7.
Stickley, C. D., Hetzler, R. K., Freemyer, B. G., & Kimura, I. F. (2008). Isokinetic peak torque ratios and shoulder injury history in adolescent female volleyball athletes. Journal of Athletic Training, 43(6), 571-7. https://doi.org/10.4085/1062-6050-43.6.571
Stickley CD, et al. Isokinetic Peak Torque Ratios and Shoulder Injury History in Adolescent Female Volleyball Athletes. J Athl Train. 2008;43(6):571-7. PubMed PMID: 19030134.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Isokinetic peak torque ratios and shoulder injury history in adolescent female volleyball athletes. AU - Stickley,Christopher D, AU - Hetzler,Ronald K, AU - Freemyer,Bret G, AU - Kimura,Iris F, PY - 2008/11/26/pubmed PY - 2009/3/4/medline PY - 2008/11/26/entrez KW - glenohumeral joint, medial-lateral shoulder rotation KW - shoulder strength KW - strength ratios SP - 571 EP - 7 JF - Journal of athletic training JO - J Athl Train VL - 43 IS - 6 N2 - CONTEXT: Few researchers have examined shoulder strength in adolescent volleyball athletes despite increasing levels of participation in this age group. OBJECTIVE: To compare medial and lateral isokinetic peak torque of the rotator cuff among skill levels and between athletes with and without a history of shoulder injury. DESIGN: Cross-sectional design. SETTING: The Human Performance Lab and Athletic Training Lab. PATIENTS OR OTHER PARTICIPANTS: Thirty-eight female adolescent club volleyball athletes from 10 to 15 years of age (mean = 13.02 +/- 1.60 years). MAIN OUTCOME MEASURE(S): We measured concentric and eccentric peak torque of the medial and lateral rotators of the shoulder and calculated resultant cocking and spiking ratios based on peak torque values. RESULTS: Athletes at higher skill levels had higher peak torque measurements in concentric and eccentric medial and lateral rotation compared with the athletes at lower skill levels. No differences in peak torque existed between participants with or without an injury history 6 months before the study. Strength ratios did not differ across skill levels, but previously injured participants produced lower eccentric medial rotation to concentric lateral rotation ratios compared with participants without a history of injury (P = .02). At the highest skill level, previously injured participants produced lower eccentric lateral rotation to concentric medial rotation ratios compared with participants without an injury history (P = .04). CONCLUSIONS: Differences in medial and lateral shoulder rotator strength ratios appear to be related more to injury prevalence than to absolute strength. Shoulder dysfunction related to strength ratio deficits also may exist in adolescent female volleyball athletes. Preventive shoulder strengthening programs focused on improving eccentric strength and correcting imbalances between medial and lateral rotators may be warranted for all female adolescent volleyball athletes. SN - 1938-162X UR - https://www.unboundmedicine.com/medline/citation/19030134/Isokinetic_peak_torque_ratios_and_shoulder_injury_history_in_adolescent_female_volleyball_athletes_ L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19030134/ DB - PRIME DP - Unbound Medicine ER -