Korean J Sports Med.  2022 Jun;40(2):128-137. 10.5763/kjsm.2022.40.2.128.

Comparison of Isokinetic Knee Strength Profiles According to History of Knee Surgery in Korean Women’s Professional Basketball Players

• Song M
• Kang H
• Lee I

• KMID: 2530316
• DOI: http://doi.org/10.5763/kjsm.2022.40.2.128

Abstract

Purpose
This study compared isokinetic knee strength profiles by knee surgery history in basketball players.
Methods
A total of 17 professional female basketball players (age, 23.7±3.8 years) participated in this study. All the participants performed maximal isokinetic knee strength test concentrically at a velocity of 60°• sec ⁻¹ and 180°• sec ⁻¹ . Strength variables included peak torque (PT), body mass normalized PT (NPT), bilateral strength difference (BD), hamstrings to quadriceps strength (H/Q) ratio. Independent t-test and one-way analysis of variance were used to compare mean differences in the measured parameters by knee surgery history and limb-based sugroups, respectively.
Results
Nine subjects had a history of knee surgery. At all velocities, there were no significant group differences in PTs, NPTs, BDs, and H/Q ratios of the knee extensor and flexor muscles by knee surgery history. Overall, NPTs of knee extensor and flexor muscles were 2.91−3.01 N• m• kg ⁻¹ and 1.55⁻¹.59 N• m• kg⁻¹ , respectively, and H/Q ratios ranged from 52% to 55%. At 180°• sec ⁻¹ . NPTs of knee extensor and flexor muscles were 1.90⁻¹.92 N• m• kg ⁻¹ and 1.08−1.10 N• m• kg ⁻¹ , respectively, and H/Q ratios ranged from 57% to 58%.
Conclusion
The current findings suggested that isokinetic knee strength profiles measured at 60°• sec ⁻¹ and 180°• sec ⁻¹ velocities were similar regardless of a history of knee surgery in the professional female basketball players.

Keyword

Isokinetic knee strength; Basketball players; Knee injuries; Quadriceps; Peak torque