POWER, K., D. BEHM, F. CAHILL, M. CARROLL, and W. YOUNG. An Acute Bout of Static Stretching: Effects on Force Jumping Performance. Med. Sci. Sports Exerc., Vol. 36, No. 8, pp. 1389–1396, 2004. Introduction/Purpose: The objectives this study were to examine whether a static stretching (SS) routine decreased isometric force, muscle activation, jump power while improving range motion (ROM). Second, the attempted compare duration dependent variable changes with change in ROM. Methods: Twelve...

This review explores the differences between agility in invasion sports (defined as including reactive decision-making) and change-of-direction speed (CODS), highlights implications for training. Correlations tests CODS indicate that they represent independent skills. Agility discriminate higher- from lower-standard athletes better than tests, indicating cognitive element of is important to performance. Training studies have shown development strength qualities can transfer gains CODS, but...

Click to increase image sizeClick decrease sizeKey Words: warm-upmuscular powerstretch-shortening cycle

ABSTRACTThe purpose of this research was to determine whether a loaded countermovement jump (LCMJ) could be enhanced if preceded by set half-squats with 5-RM load. Ten subjects experienced the squat exercise performed 2 sets 5 LCMJ, 1 reps load, and

The purpose of this study was to determine if straight sprint training transferred agility performance tests that involved various change-of-direction complexities and sprinting speed. Thirty-six males were tested on a 30-m 6 with 2-5 changes direction at angles. subjects participated in 2 sessions per week for weeks using 20-40-m sprints (speed) or (3-5 100 degrees) (agility). After the period, retested, speed resulted significant improvements (p < 0.05) but limited gains tests. Generally,...

The purpose of this investigation was to examine power performance in jump squats when using the complex and contrast training methods. Eleven (n = 11) women participated a familiarization session three randomly ordered testing sessions. One involved completing sets exercises (jump squats) before half (traditional method). second (complex A third alternation (contrast No significant difference squat between each methods found. There (p < 0.05) first set session, with method having...

The purpose of this cross-sectional study was to evaluate the effect unstable and unilateral resistance exercises on trunk muscle activation. Eleven subjects (6 men 5 women) between 20 45 years age participated. Six exercises, as well bilateral shoulder chest presses against resistance, were performed stable (bench) (Swiss ball) bases. Electromyographic activity upper lumbar, lumbosacral erector spinae, lower-abdominal muscles monitored. Instability generated greater activation stabilizer...

The purpose of this study was to determine the effects training change-of-direction speed and small-sided games on performance in Planned-AFL agility test reactive agility. Twenty-five elite-standard U-18 Australian Rules football players were randomly allocated either a group or group. Players participated one two 15-min sessions per week with 11 conducted over 7-week period during season. Tests immediately before after included video-based specific football. variables total time, decision...

The purpose of this study was to determine if there is an association between variables that describe movements in Australian Rules football (ARF) game with muscle damage. Fourteen elite junior ARF players were monitored a global positioning system (GPS) during match, and damage estimated by determining creatine kinase (CK) 24 hours postmatch. median split based on CK levels, into high low group, the groups compared independent t-tests. primary finding group experienced greater (high group)...

Young, WB, Miller, IR, and Talpey, SW. Physical qualities predict change-of-direction speed but not defensive agility in Australian Rules football. J Strength Cond Res 29(1): 206–212, 2015—The purpose of this study was to determine the relationships between selected physical qualities, (COD) speed, performance football players. Twenty-four male community-level players were assessed on sprint acceleration (10-m time), maximum strength (3 repetition-maximum half squat), leg power...

Abstract Agility is an important skill for both attackers and defenders in invasion sports such as codes of football. On the sporting field, agility requires reacting to a stimulus, often presented by opponent’s movement, before change direction or speed. There plethora research that examines movement component isolation, which described change-of-direction (COD) ability, this thought underpin performance. This opinion article proposes COD ability should not be researched only primary...

ABSTRACTThis study investigated the effects of execution speed on measures strength, muscular power, and hypertrophy. Eighteen male subjects trained with half-squat exercise using an 8- to 12-RM load for 7-1/2 weeks. Eight tried produce fast concentric contractions while 10 subjec

ABSTRACTThis study compared a countermovement jump (CMJ) and drop jumps performed according to 3 objectives: maximum height (DJ-H), minimum contact time (DJ-t), height/contact ratio (DJ-H/t). Subjects (N = 17 males) all 4 conditions on mat/computer

To describe the physiological responses to tournament tennis in relation prevailing environmental conditions, match notation, and skills that underpin performance.14 male professional players (mean (SD) age, 21.4 (2.6) years; height, 183.0 (6.9) cm; body mass, 79.2 (6.4) kg) were studied while contesting international tournaments. Environmental (core temperature, hydration status, heart rate, blood variables), performance indices (serve kinematics, serve velocity, error rates) recorded.Hard...

The purpose of this study was to examine the extent activation in various trunk muscles during dynamic weight-training and isometric instability exercises. Sixteen subjects performed squats deadlifts with 80% 1 repetition maximum (1RM), as well body weight resistance 2 unstable calisthenic-type exercises (superman sidebridge). Electromyographic (EMG) activity measured from lower abdominals (LA), external obliques (EO), upper lumbar erector spinae (ULES), lumbar-sacral (LSES) muscle groups....