The Effect of a Simulated Basketball Game on Players' Sprint and Jump Performance, Temperature and Muscle Damage.

Despite extensive data regarding the demands of playing basketball, the relative importance of factors that cause fatigue and muscle potentiation has been explored only tentatively and remains unclear. The aim of this experimental field study was to assess changes in leg muscle power and relate these changes to body temperature modifications and indices of exercise-induced muscle damage in response to a simulated basketball game. College-level male basketball players (n=10) were divided into two teams to play a simulated basketball game.

Effect of a periodized power training program on the functional performances and contractile properties of the quadriceps in sprinters.

Our purpose was to compare the effect of a periodized preparation consisting of power endurance training and high-intensity power training on the contractile properties of the quadriceps muscle and functional performances in well trained male sprinters (n = 7). After 4 weeks of high-intensity power training, 60-m sprint running time improved by an average of 1.83% (SD = 0.

The effect of sports specialization on musculus quadriceps function after exercise-induced muscle damage.

The primary aim of the present study was to examine the effect of eccentric exercise-induced (100 submaximal eccentric contractions at an angular velocity of 60° s⁻¹, with 20-s rest intervals) muscle damage on peripheral and central fatigue of quadriceps muscle in well-trained long-distance runners, sprint runners, volleyball players, and untrained subjects. We found that (i) indirect symptoms of exercise-induced muscle damage (prolonged decrease in maximal voluntary contraction, isokinetic concentric torque, and electrically induced (20 Hz) torque) were most evident in untrained subjects, while there were no significant differences in changes of muscle soreness and plasma creatine kinase 48 h after eccentric exercise between athletes and untrained subjects; (ii) low-frequency fatigue was greater in untrained subjects and volleyball players than in sprint runners and long-distance runners; (iii) in all subjects, electrically induced (100 Hz) torque decreased significantly by about 20%, while central activation ratio decreased significantly by about 8% in untrained subjects and sprint runners, and by about 3%-5% in long-distance runners and volleyball players. Thus, trained subjects showed greater resistance to exercise-induced muscle damage for most markers, and long-distance runners had no advantage over sprint runners or volleyball players.

Leg immersion in warm water, stretch-shortening exercise, and exercise-induced muscle damage.

Context: Whether muscle warming protects against exercise-induced muscle damage is unknown.

Objective: To determine the effect of leg immersion in warm water before stretch-shortening exercise on the time course of indirect markers of exercise-induced muscle damage.

Design: Crossover trial.

Bi-modal recovery of quadriceps femoris muscle function after sustained maximum voluntary contraction at different muscle length.

The aim of this study was to test the hypothesis that contractility of quadriceps femoris muscle during a 15-min period after a sustained maximum voluntary contraction for 1 min is determined by the interaction of posttetanic potentiation, metabolic fatigue, and nonmetabolic fatigue. Eleven healthy untrained men (age, 22.9+/-1.

Bimodal recovery of quadriceps muscle force within 24 hours after sprint cycling for 30 seconds.

Unlabelled: The aim of the study was to investigate the manifestation of potentiation and fatigue as well as the coexistence of these phenomena at different muscle lengths during a 24-hour period after a sprint cycling for 30 s.

Material And Methods: Twelve healthy untrained men (mean age 23.6+/-1.

The Time-Course of Voluntary and Electrically Evoked Muscle Performance During and After Stretch-Shortening Exercise is Different.

The aim of the study was to establish the dynamics of maximal voluntary contraction force (MVCF), height of drop jump (DJ) and electrically evoked quadriceps muscle force at different stimulation frequencies during and after 100 DJs (stretch-shortening exercise, SSE). Healthy untrained men (n = 11; age = 21.8 ± 1.

Dynamics of indirect symptoms of skeletal muscle damage after stretch-shortening exercise.

Healthy untrained men (age 20.4+/-1.7 years, n=20) volunteered to participate in an experiment in order to establish dynamics of indirect symptoms of skeletal muscle damage (ISMD) (decrease in maximal isometric voluntary contraction torque (MVCT) and torque evoked by electrostimulation at different frequencies and at different quadriceps muscle length, height (H) of drop jump (DJ), muscle soreness and creatine kinase (CK) activity in the blood) after 100 DJs from 0.

Low frequency fatigue of quadriceps muscle after sustained maximum voluntary contractions.

Immediately after sustained maximum voluntary contractions for 60 s, greater quadriceps muscle fatigue and, especially, low frequency fatigue is observed. The results of our study have shown that immediately after the exercise there was a significant (P<0.05) decrease in muscle force induced by low (20 Hz) and high (50 Hz) stimulation frequencies and maximum voluntary contractions (it is not muscle length-dependent) and it did not recover to its initial (pre-exercise) level 15 min after the end of exercise.