Optimum Drop Height for Maximizing Power Output in Drop Jump: The Effect of Maximal Muscle Strength.

The main purpose of this study was to explore the cause-and-effect relation of maximal muscle strength (MSmax) on the optimum drop height (DHopt) that maximizes power output in drop jump. In total, 30 physically active male students participated in this study, whereas the 16 subjects were selected according to their resistance strength training background (i.e.

The relationship between hip, knee and ankle muscle mechanical characteristics and gait transition speed.

The purpose of the present study was to explore the relationship between mechanical characteristics of hip, knee and ankle extensor and flexor muscle groups and gait transition speed. The sample included 29 physically active male adults homogenized regarding their anthropometric dimensions. Isokinetic and isometric leg muscle mechanical characteristics were assessed by an isokinetic dynamometer, while individual walk-to-run (WRT) and run-to-walk transition speeds (RWT) were determined using the standard increment protocol.

The relationship between allometry and preferred transition speed in human locomotion.

The purpose of this study was to explore the relationships between preferred transition speed (PTS) and anthropometric characteristics, body composition and different human body proportions in males. In a sample of 59 male students, we collected anthropometric and body composition data and determined individual PTS using increment protocol. The relationships between PTS and other variables were determined using Pearson correlation, stepwise linear and hierarchical regression.

The effects of cyclooxygenase and nitric oxide synthase inhibition on cardiodynamic parameters and coronary flow in isolated rat hearts.

Background: Despite the widespread clinical use of cyclooxygenase (COX) inhibitors, dilemmas regarding the potential impact of these drugs on the cardiovascular system persist.

Objective: To estimate the effects of different COX inhibitors (meloxicam, acetylsalicylic acid [ASA] and SC-560) on cardiac function and coronary flow in isolated rat hearts, with special focus on the L-arginine/nitric oxide system.

Methods: The hearts of eight-week-old male Wistar albino rats (n=72; 12 rats per group; body mass 180 g to 200 g) were retrogradely perfused according to the Langendorff technique at gradually increased perfusion pressure (40 cmH2O to 120 cmH2O).

Pre-activity modulation of lower extremity muscles within different types and heights of deep jump.

The purpose of this study was to determine modulation of pre- activity related to different types and heights of deep jump. Sixteen male soccer players without experience in deep jumps training (the national competition; 15.0 ± 0.