Buckeridge Erica, LeVangie Marc C, Stetter Bernd, Nigg Sandro R, Nigg Benno M
Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada.
PLoS One. 2015 May 14;10(5):e0127324. doi: 10.1371/journal.pone.0127324. eCollection 2015.
Skating is a fundamental movement in ice hockey; however little research has been conducted within the field of hockey skating biomechanics due to the difficulties of on-ice data collection. In this study a novel on-ice measurement approach was tested for reliability, and subsequently implemented to investigate the forward skating technique, as well as technique differences across skill levels. Nine high caliber (High) and nine low caliber (Low) hockey players performed 30 m forward skating trials. A 3D accelerometer was mounted to the right skate for the purpose of stride detection, with the 2nd and 6th strides defined as acceleration and steady-state, respectively. The activity of five lower extremity muscles was recorded using surface electromyography. Biaxial electro-goniometers were used to quantify hip and knee angles, and in-skate plantar force was measured using instrumented insoles. Reliability was assessed with the coefficient of multiple correlation, which demonstrated moderate (r>0.65) to excellent (r>0.95) scores across selected measured variables. Greater plantar-flexor muscle activity and hip extension were evident during acceleration strides, while steady state strides exhibited greater knee extensor activity and hip abduction range of motion (p<0.05). High caliber exhibited greater hip range of motion and forefoot force application (p<0.05). The successful implementation of this on-ice mobile measurement approach offers potential for athlete monitoring, biofeedback and training advice.
滑冰是冰球运动中的一项基本动作；然而，由于冰上数据收集的困难，在冰球滑冰生物力学领域进行的研究很少。在本研究中，对一种新型的冰上测量方法进行了可靠性测试，随后将其用于研究向前滑冰技术以及不同技能水平之间的技术差异。九名高水准（高）和九名低水准（低）的冰球运动员进行了30米向前滑冰测试。在右冰鞋上安装了一个三维加速度计，用于检测步幅，其中第二步和第六步分别定义为加速步和稳态步。使用表面肌电图记录了五块下肢肌肉的活动。使用双轴电子测角仪来量化髋关节和膝关节角度，并使用仪器化鞋垫测量冰鞋内的足底力。通过多重相关系数评估可靠性，结果表明在选定的测量变量中，可靠性得分从中度（r>0.65）到优秀（r>0.95）。在加速步期间，足底屈肌的肌肉活动和髋关节伸展更为明显，而稳态步则表现出更大的膝关节伸肌活动和髋关节外展运动范围（p<0.05）。高水准运动员表现出更大的髋关节运动范围和前足力应用（p<0.05）。这种冰上移动测量方法的成功实施为运动员监测、生物反馈和训练建议提供了可能性。
