Muscle soreness that has a delayed onset is common feature among both athletes and untrained individuals who engage in unusual exercises. This study was designed to provide additional morphological data assess the relevance significance of our previous findings sore muscles contain fibers with disorganized myofibrillar material. biopsies were obtained from 12 males (mean age 25 +/- 7 years), suffered severe their thigh 18--72 h following eccentric bicycle exercise. Their strength performance...

Abstract Aim: Nitric oxide (NO), synthesized from l ‐arginine by NO synthases, plays a role in adaptation to physical exercise modulating blood flow, muscular contraction and glucose uptake the control of cellular respiration. Recent studies show that can be formed vivo also reduction inorganic nitrate (NO 3 − ) nitrite 2 ). The diet constitutes major source nitrate, vegetables are particularly rich this anion. aim study was investigate if dietary had any effect on metabolic circulatory...

The influence of muscle temperature ( T m ) on maximal strength, power output, jumping, and sprinting performance was evaluated in four male subjects. In one the subjects electromyogram (EMG) recorded from M. vastus lateralis, biceps femoris, semitendinosus. ranged 30.0°C to 39°. Maximal dynamic were positively related . changes same order magnitude for all these parameters (4–6%× C ‐1 isometric strength decreased by 2%× with decreasing force‐velocity relationship shifted left at subnormal...

Abstract The relationship between the subjective rating of perceived exertion (RPE) and different physiological variables during work were investigated in 19 healthy subjects under following conditions: 1) after heart rate (HR) has been experimentally changed by use autonomic nervous system blocking agents. 2) types physical 3) before an 8 week period training, respectively. In most situations, HR mirrors strain subjectively experienced. However, this good correlation RPE was altered...

1 A role of the immune system in muscular adaptation to physical exercise has been suggested but data from controlled human studies are scarce. The present study investigated immunological events blood and skeletal muscle by immunohistochemistry flow cytometry after eccentric cycling multiple biopsies. 2 Immunohistochemical detection neutrophil- (CD11b, CD15), macrophage- (CD163), satellite cell- (CD56) IL-1β-specific antigens increased similarly together with biopsies, or biopsies only. 3...

Seven male subjects performed repeated bouts of high‐intensity exercise, on a cycle ergometer, before and after 6 d creatine supplementation (20 g Cr H 2 O day ‐1 ). The exercise protocol consisted five 6‐s periods at fixed intensity, interspersed with 30‐s recovery (Part I), followed (40 s later) by one 10 period II) where the ability to maintain power output was evaluated. Muscle biopsies were taken from m. vastus lateralis rest, immediately (i) fifth in Part I (ii) II. In addition, series...

Muscular adaptation to physical exercise has previously been described as a repair process following tissue damage. Recently, evidence published question this hypothesis. The purpose of study was investigate inflammatory processes in human skeletal muscle and epimysium after acute with large eccentric components. Three groups subjects (n= 19) performed 45 min treadmill running at either 4 deg 5) or 8 9) downhill uphill one group served control 9). One biopsy taken from each subject 48 h post...

Seven male subjects performed 15×40m sprints, on three occasions, with rest periods of either 120 s (R120), 60 (R60) or 30 (R30) between each sprint. Sprint times were recorded four photo cells placed at 0, 15, and 40 m. The performance data indicated that whereas running speed over the last 10 m sprint decreased in all protocols (after 11 sprints R120, 7 R60 3 R30), during initial acceleration period from 0-15 was only affected shortest increasing (mean±SEM) 2.58±.03 (sprint 1) to 2.78±.04s...

Two intermittent high‐intensity exercise protocols were performed before and after the administration of either creatine or a placebo, performance characteristics selected physiological responses studied. Each protocol consisted 10 6‐s bouts cycling at 2 intensities (130 rev/min [EX 130 ]: ∼820 W 140 )]: ∼ 880 W) so that in EX same amount was period, whereas an intensity chosen to induce fatigue over bouts. Sixteen healthy male subjects randomly assigned experimental groups. A double‐blind...

Abstract The aim of the present study was to examine movement patterns, ball skills, and impressions Swedish elite football players during competitive games on artificial turf natural grass. Time – motion analyses (36 observations) technical (16 team were performed 72 male 21 female completed a questionnaire. No differences observed between grass in terms total distance covered (mean 10.19 km, s = 0.19 vs. 10.33 0.23), high-intensity running (1.86 0.10 1.87 0.14), number sprints (21, 1 22,...