IMPROVING PELVIC MOVEMENTS DURING DIVING IN FOOTBALL GOALKEEPERS -EFFECTS OF HIP-LOCK TRAINING

The purpose of this study was to introduce Hip Rock to football goalkeepers and to investigate the differences in pelvic movement and lower limb joint torque exertion of the opposite leg before and after Hip Rock Training. All subjects in the training group improved the maximum value of hip extension torque in the opposite leg after training. The effect of the interaction was greater in the training group than in the control group in the demonstration of hip extension torque in the opposite leg. The stability of the pelvic musculature could be obtained, and the extension torque of the hip joint could be improved by gaining a sense of power to the ground. These results suggest that hip lock training and its application training can be useful for goalkeepers who are unable to lower their trunks in the direction of play or move their center of gravity smoothly

Wormholes in 2d Horava-Lifshitz quantum gravity

We quantize the two-dimensional projectable Horava-Lifshitz gravity with a bi-local as well as space-like wormhole interaction. The resulting quantum Hamiltonian coincides with the one obtained through summing over all genus in the string field theory for two-dimensional causal dynamical triangulations. This implies that our wormhole interaction can be interpreted as a splitting or joining interaction of one-dimensional strings.Comment: 10 page

EFFECT OF FOOT ROTATION ANGLE ON THE ROTATIONAL RANGE OF MOTION OF TRUNK AND PELVIS

The purposes of this study were to investigate the effect of foot rotation angle on the rotational range of motion (ROM) of trunk and pelvis. Eleven healthy males participated in this study who performed a maximum rotation of the trunk in a standing posture on the conditions of five different foot rotation angles based on “the central angle” that was defined as the average of the maximum internal- and external-rotation of hip joint in a static standing. Kinematic and kinetic analysis was performed with an optical motion capture system and two force plates. The ROM of the pelvis segment decreased significantly on the conditions of -30deg or +30deg compared to the ROM on the condition of the central angle. The load on the foot on the rotating side increased and the free moment decreased as the foot rotation angle increased externally

EFFECT OF FOOT ROTATION ANGLE ON TRUNK ROTATIONAL STRENGTH AND PHYSICAL QUANTITY TO ROTATE THE BODY

The purposes of this study were to investigate the influence of foot rotation angle on trunk rotational strength and physical quantity to rotate the body. Ten healthy males participated in this study who exerted the maximum trunk rotational strength in a standing posture on the conditions of five different foot rotation angles based on “the central angle” that was defined as the average of the maximum internal- and external-rotation of hip joint in a static standing. The force was measured by force gauge sensor. Biomechanical analysis was performed with an optical motion capture system and two force plates. No significant difference was observed in the rotational strength between any conditions, but as the foot rotation angle increased externally, the free moment acting on the right foot decreased and the moment around the center of mass by the ground reaction forces acting on both feet increased

Tensor network approach to 2d Lorentzian quantum Regge calculus

We demonstrate a tensor renormalization group (TRG) calculation for a two-dimensional Lorentzian model of quantum Regge calculus (QRC). This model is expressed in terms of a tensor network by discretizing the continuous edge lengths of simplicial manifolds and identifying them as tensor indices. The expectation value of space-time area, which is obtained through the higher-order TRG method, nicely reproduces the exact value. The Lorentzian model does not have the spike configuration that was an obstacle in the Euclidean QRC, but it still has a length-divergent configuration called a pinched geometry. We find a possibility that the pinched geometry is suppressed by checking the average edge length squared in the limit where the number of simplices is large. This implies that the Lorentzian model may describe smooth geometries. Our results also indicate that TRG is a promising approach to numerical study of simplicial quantum gravity.Comment: 25 pages, 23 figure

A unified treatment of the exceptions to the Agent/ECM Correlation

Based on the contrast between the believe-class and the wager-class verbs, Pesetsky (1992) makes a generalization that agentive verbs do not allow ECM (the Agent/ECM Correlation). However, he notes two classes of exceptions to the generalization. I argue that the two classes of exceptions can be uniformly treated as causatives and that the Agent/ECM Correlation can be seen as an instance of the broader l-syntax finding that – not all internal arguments are created equal – with agentive activity verbs the root selects an internal argument, but not with change-of-state verbs (Basilico 1998, Hale and Keyser 2002, Alexiadou and Schäfer 2011, Cuervo 2014)

Relationship Between Excitability of Spinal Motor Neurons in Remote Muscles and Voluntary Movements

In physical therapy, it is important to understand the influence of the contraction of a particular muscle on other muscles. The mechanism of the facilitation effect of muscle contraction in healthy subjects has been analyzed in previous studies. These studies indicated that muscle contraction with voluntary movement enhances the excitability of spinal motor neurons and motor areas in the cerebral cortex that are not directly associated with the contracting muscle. Furthermore, it has been reported that the facilitation effects on remote muscles not related to movement are affected by the elapsed time since the start of the movement, the strength of muscle contraction, the number of muscle spindles, and the difficulty of the movement. In addition, the facilitation effects of difficult voluntary movements of the unilateral upper limbs on spinal motor neurons in the contralateral upper limb decrease with motor learning. We expect that these findings will be useful not only for physical therapy evaluation but also for patient treatment