Marc Dauty1,2,3, Pierre Menu1,2,3, Thomas Garraud4, Olivier Mesland1,2, Thibaud Berlivet2, Benoit Metayer3,4, Alban Fouasson-Chailloux5,6,7,8. 1. Physical Medicine and Rehabilitation Department, CHU Nantes, Hôpital Saint Jacques, 85 rue Saint Jacques, 44093, Nantes Cedex 03, France. 2. Sports Medicine Department, CHU Nantes, Hôpital Saint Jacques, 85 rue Saint Jacques, 44093, Nantes Cedex 03, France. 3. Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, 44042, Nantes, France. 4. Rheumatologic Department, CHU Nantes, Place Alexis-Ricordeau, 44093, Nantes Cedex, France. 5. Physical Medicine and Rehabilitation Department, CHU Nantes, Hôpital Saint Jacques, 85 rue Saint Jacques, 44093, Nantes Cedex 03, France. alban.fouassonchailloux@chu-nantes.fr. 6. Sports Medicine Department, CHU Nantes, Hôpital Saint Jacques, 85 rue Saint Jacques, 44093, Nantes Cedex 03, France. alban.fouassonchailloux@chu-nantes.fr. 7. Inserm, UMR 1229, RMeS, Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, 44042, Nantes, France. alban.fouassonchailloux@chu-nantes.fr. 8. MPR Locomotrice et Respiratoire, CHU de Nantes, Hôpital St Jacques, 85 rue Saint Jacques, 44093, Nantes Cedex 1, France. alban.fouassonchailloux@chu-nantes.fr.
Abstract
PURPOSE: Jumper's knee is characterized by an anterior knee pain during tendon palpation and can be classified in overuse pathologies, secondary to repetitive jumps. The prevalence is high in professional basketball players. It is responsible for an alteration of the motor control inducing a strength deficit of the quadriceps. We aimed to describe an isokinetic curve anomaly, a double-humped curve called "Camel's Back curve", consequence of a jumper's knee history. METHODS: 170 Professional basketball players were enrolled (24.8 ± 4.6 years; 91.8 ± 12.0 kg, 194 ± 9.0 cm). All players performed isokinetic tests of the knee extensors on a concentric mode at the angular speed of 60°/s and 180°/s. RESULTS: 43 players had a jumper's knee history and 35 (81%) had a "Camel's Back curve" at 60°/s. The sensitivity and the specificity of this curve were 81.3% and 100%, respectively. The minimum torque of strength was decreased from 12 to 18% compared to the 2 maximal peaks. Yet, the strength measured every 5° of ROM was significantly different between the players with "Camel's Back curve" and those with normal curve. CONCLUSIONS: "Camel's Back curve" had never been described in that context. It may be secondary to a protective inhibitory mechanism which could alter jumping. The presence of a "Camel's Back curve" would enable clinicians to adapt physical preparation, knee rehabilitation, and trainings to improve players performances.
PURPOSE: Jumper's knee is characterized by an anterior knee pain during tendon palpation and can be classified in overuse pathologies, secondary to repetitive jumps. The prevalence is high in professional basketball players. It is responsible for an alteration of the motor control inducing a strength deficit of the quadriceps. We aimed to describe an isokinetic curve anomaly, a double-humped curve called "Camel's Back curve", consequence of a jumper's knee history. METHODS: 170 Professional basketball players were enrolled (24.8 ± 4.6 years; 91.8 ± 12.0 kg, 194 ± 9.0 cm). All players performed isokinetic tests of the knee extensors on a concentric mode at the angular speed of 60°/s and 180°/s. RESULTS: 43 players had a jumper's knee history and 35 (81%) had a "Camel's Back curve" at 60°/s. The sensitivity and the specificity of this curve were 81.3% and 100%, respectively. The minimum torque of strength was decreased from 12 to 18% compared to the 2 maximal peaks. Yet, the strength measured every 5° of ROM was significantly different between the players with "Camel's Back curve" and those with normal curve. CONCLUSIONS: "Camel's Back curve" had never been described in that context. It may be secondary to a protective inhibitory mechanism which could alter jumping. The presence of a "Camel's Back curve" would enable clinicians to adapt physical preparation, knee rehabilitation, and trainings to improve players performances.
Authors: Marie Chantrelle; Pierre Menu; Marie Gernigon; Bastien Louguet; Marc Dauty; Alban Fouasson-Chailloux Journal: Sensors (Basel) Date: 2022-05-09 Impact factor: 3.847
Authors: Toufic R Jildeh; Patrick Buckley; Muhammad J Abbas; Brendan Page; Jacob Young; Nima Mehran; Kelechi R Okoroha Journal: Orthop J Sports Med Date: 2021-09-03
Authors: Jérôme Grondin; Vincent Crenn; Marie Gernigon; Yonis Quinette; Bastien Louguet; Pierre Menu; Alban Fouasson-Chailloux; Marc Dauty Journal: Int J Environ Res Public Health Date: 2022-07-06 Impact factor: 4.614