PURPOSE The Achilles tendon (AT) must adapt to meet changes in demands. This study explored AT adaptation by comparing properties within the jump and non-jump legs of jumping athletes. Non-jumping control athletes were included to control limb dominance effects. METHODS AT properties were assessed in the preferred (jump) and non-preferred (lead) jumping legs of male collegiate-level long and/...

A series of surgically treated patellar tendon lesions among athletes is presented. The material was collected during 5 years from three sports injury clinics and from two hospitals. During this period the authors treated about 150 cases of jumper's knee, of which 34 cases were treated by operation. The athletes were mostly volley ball players, jumpers or runners. The operation revealed a necro...

The objective of this study was to analyse selected kinematic parameters (time of flying, in-run velocity, take-off velocity, out-run velocity, height of flying at 17 m, height of flying at 75 m, height of flying at 120 m, aerodynamic index at 17 m, aerodynamic index at 75 m, aerodynamic index at 120 m) of the best world-class ski jumpers participating in the two final individual competitions (...

The purpose of this study was to clarify the kinetic characteristics take-off leg during phase required effectively change direction center mass velocity vector in running single-leg jump (RSLJ) by comparing kinetics jumpers and sprinters. Nine male collegiate 9 sprinters performed RSLJ 2 tasks designed achieve as much forward upward motion possible, respectively, with 4 different run-up speeds...

Abstract Based on the current situation of frequent wind deflection faults 500 kV transmission line jumpers caused by typhoons in coastal areas, this paper proposes a new sectional proof post insulator transformation measure analyzing advantages and disadvantages conventional jumper measures, which effectively improves anti typhoon resistance jumpers. It can save amount steel for tower greatly ...

The effect of skis on the force-time characteristics of the simulated ski jumping takeoff was examined in a wind tunnel. Takeoff forces were recorded with a force plate installed under the tunnel floor. Signals from the front and rear parts of the force plate were collected separately to examine the anteroposterior balance of the jumpers during the takeoff. Two ski jumpers performed simulated t...

The aim of this study was to find out the relationship between selected anthropometric and physiological variables of college level female long jumpers and sprinters. Fifteen female sprinters and fifteen female long jumpers of Post Graduate Government college sector-11 Chandigarh were tested. The range of age for all female sportspersons lies from 20 to 25 years. The selected anthropometric mea...

INTRODUCTION This study evaluated side-to-side difference in tibial bone structure, calf muscle cross-sectional area (CSA) and hopping force in master athletes as a result of training for sports with different magnitudes of inter-leg loading difference. METHODS Tibial bone parameters (at 4%, 14%, 38% and 66% tibial length proximal to distal end), muscle CSA (at 66% tibial length) and hopping ...

BACKGROUND: It remains unclear if plyometric training as a single component could improve landing mechanics that are potentially associated with lower risk of ACL injury in the long term OBJECTIVE: The purpose this study was to investigate influence experience undertaking plyometrics on biomechanics female athletes. METHODS: Non-jumpers little (12 college swimmers) and jumpers five years high j...