Power output in vertical jumps: does optimum loading depend on activity profiles?

The previously proposed maximum dynamic output hypothesis (MDO: i.e. the optimum load for maximizing the power output during jumping is one's own body) was tested on individuals of various activity profiles.

Anthropometric and physical performance profiles of elite karate kumite and kata competitors.

KARATE TOURNAMENTS CONSIST OF TWO EQUALLY IMPORTANT KARATE DISCIPLINES: the kumite and kata competitions. Due to being based both on the distinctive selection of movement techniques and their kinematic and kinetic patterns, we hypothesized that the elite kumite and kata competitors could differ regarding their anthropometric and physical performance profiles. Thirty-one senior male karate competitors of the national karate team (kumite n = 19; kata n = 12) participated in this study.

Evaluation of alternating consecutive maximum contractions as an alternative test of neuromuscular function.

The standard strength test (SST) has been based only on sustained maximum forces, as well as on relatively large number trials needed to record the maximum forces (F) and their rate of development (RFD). The aim of this study was to extend our recent research on alternating consecutive maximum contractions (ACMC) performed by antagonist muscles. Instead of varying the frequency, we explored the properties of ACMC performed at the self-selected frequency and compared it with SST.

Optimum loading for maximizing muscle power output: the effect of training history.

Although the effect of external load on the mechanical output of individual muscle has been well documented, the literature still provides conflicting evidence regarding whether the optimum loading (L(opt)) for exerting the maximum muscle power output (MPO) could be different for individuals with different levels of strength and power. The aim of this study was to explore the effect of training history on L(opt) that maximizes MPO during the 6-s maximal cycling sprint test. Forty healthy young males (strength-and speed-trained athletes, and physically active and sedentary non-athletes) were tested on maximum strength, and on peak MPO when loaded 5-12% of body weight (BW).

Evaluation of the field tests of flexibility of the lower extremity: reliability and the concurrent and factorial validity.

The purpose of this study was to evaluate the standard field tests of flexibility of the lower extremity through their (a) intratrial and test-retest reliability, (b) concurrent validity with respect to a high-precision 3D system for kinematic recording, and (c) factorial validity. Physically active men (n = 84) were tested over 2 separate sessions by means of standard simple devices (kinanthropometry, ruler, and protractor) on the following flexibility tests: leg raise in a supine position, hip abduction test, single-legged knee bend (SLKB), sideward leg splits (SdLS), sit and reach (SR), sideways leg splits, and lengthwise leg splits. Additionally, 17 participants were simultaneously tested by means of a laboratory 3D kinematic analysis system.