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https://www.readbyqxmd.com/read/29745784/short-term-effects-of-rolling-massage-on-energy-cost-of-running-and-power-of-the-lower-limbs
#1
Nicola Giovanelli, Filippo Vaccari, Mirco Floreani, Enrico Rejc, Jasmine Copetti, Marco Garra, Lea Biasutti, Stefano Lazzer
PURPOSE: Self-myofascial release (SMFR) is a type of self-massage that is becoming popular among athletes. However, SMFR effects on running performance have not been investigated yet. The aim of the present study was to evaluate the effects of SMFR on cost of running (Cr). In addition, we evaluated the effects of SMFR on lower limbs muscle power. METHODS: The measurement of Cr and lower limb muscle power during squat jump (SJ) and counter movement jump (CMJ) were performed before (PRE), immediately after (POST) and 3hours after (POST 3h) a SMFR protocol (experimental condition)...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29736342/validity-and-reliability-of-the-wimu-inertial-device-for-the-assessment-of-the-vertical-jump
#2
José Pino-Ortega, Javier García-Rubio, Sergio J Ibáñez
The aim of this study was to test the validity and reliability of the inertial device WIMU (Realtrack Systems SL, Almería, Spain) for the assessment of the vertical jump, counter movement jump (CMJ) and squat jump (SJ). Fifteen soccer players were evaluated in two identical sessions separated by one week. In each session, participants performed three jumps of each type. The flight time was quantified by the inertial device WIMU and by a force platform (Twin Plates; Globus Sport and Health Technologies LLC, Codogné, Italy) at the same time...
2018: PeerJ
https://www.readbyqxmd.com/read/29730331/higher-muscle-power-training-volume-is-not-determinant-for-the-magnitude-of-neuromuscular-improvements-in-elderly-women
#3
Régis Radaelli, Clarissa M Brusco, Pedro Lopez, Anderson Rech, Carlos L Machado, Rafael Grazioli, Diana C Muller, Eduardo L Cadore, Ronei S Pinto
The aim of this study was to compare the effects of 12 weeks of muscle power training using one- and three-sets on neuromuscular adaptations in elderly women. Twenty six healthy elderly women were randomly assigned into two groups: one-set (n = 13) and three-sets (n = 13). Maximal dynamic and isometric strength, rapid force assessed as absolute and normalized rate of force development (RTD) and contractile impulse during unilateral leg knee extension at 0-50 and 0-200 ms, overall quadriceps muscle thickness, muscle power during a countermovement jump (CMJ), and functional performance using time-up-and-go and the timed stair climb tests were evaluated before and after training...
May 3, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29722590/correcting-vitamin-d-insufficiency-improves-some-but-not-all-aspects-of-physical-performance-during-winter-training-in-taekwondo-athletes
#4
Hyun Chul Jung, Myong Won Seo, Sukho Lee, Sung Woo Jung, Jong Kook Song
We investigated the effects of vitamin D3 supplementation on physical performance during winter training in vitamin D insufficient taekwondo (TKD) athletes. Thirty-five collegiate male and female TKD athletes, aged 19-22 years with low serum 25(OH)D concentration (28.8±1.10 nmol/L) were randomly assigned to a vitamin D group (N=20) or a placebo group (N=15). Subjects received either a vitamin D3 capsule (5,000 IU/day) or placebo during four weeks of winter training. Blood samples were collected for analyzing serum 25(OH)D concentration...
May 3, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29697296/the-physical-profile-of-adult-male-basketball-players-differences-between-competitive-levels-and-playing-positions
#5
Davide Ferioli, Ermanno Rampinini, Andrea Bosio, Antonio La Torre, Matteo Azzolini, Aaron J Coutts
This study examined the physical differences in adult male basketball players of different competitive level and playing position using a large cohort. In the middle of the regular season, 129 players from four different Divisions completed a Yo-YoIR1 and, after 3-to-8 days, they performed a 6-min continuous running test (Mognoni's test), a counter-movement jump (CMJ) test and a 5-min High-intensity Intermittent running test (HIT). Magnitude-based inferences revealed that differences in HIT were very likely moderate between Division I and II and likely small between Division II and III...
April 26, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29670536/multi-directional-repeated-sprint-is-a-valid-and-reliable-test-for-assessment-of-junior-handball-players
#6
Amin Daneshfar, Daniel E Gahreman, Majid S Koozehchian, Sadegh Amani Shalamzari, Mozhgan Hassanzadeh Sablouei, Thomas Rosemann, Beat Knechtle, Pantelis T Nikolaidis
The aim of the present study was to examine the validity and reliability of a 10 × (6 × 5 m) multi-directional repeated sprint ability test (RSM) in elite young team handball (TH) players. Participants were members of the Iranian national team ( n = 20, age 16.4 ± 0.7 years, weight 82.5 ± 5.5 kg, height 184.8 ± 4.6 cm, body fat 15.4 ± 4.3%). The validity of RSM was tested against a 10 × (15 + 15 m) repeated sprint ability test (RSA), Yo-Yo Intermittent Recovery test Level 1 (Yo-Yo IR1), squat jump (SJ) and countermovement jump (CMJ)...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29668045/when-does-the-influence-of-maturation-on-anthropometric-and-physical-fitness-characteristics-increase-and-subside
#7
Christopher Towlson, Stephen Cobley, Guy Parkin, Ric Lovell
The relationships between maturation and anthropometric and physical performance characteristics are dynamic and often asynchronous; confounding the capability to accurately evaluate performance during adolescence. This study aimed to (i) examine the influence of chronological age (CA) and somatic maturation (YPHV) upon anthropometric and physical performance parameters, and (ii) identify the transition/change time-points in these relationships using segmental regression. N=969 soccer players (8-18 years of age) completed anthropometric and physical test assessments, including a counter-movement jump (CMJ), agility T-test, 10 and 20m sprints, and multi-stage fitness test (MSFT)...
April 18, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29658525/countermovement-depth-a-variable-which-clarifies-the-relationship-between-the-maximum-power-output-and-height-of-a-vertical-jump
#8
Jan Gajewski, Radosław Michalski, Krzysztof Buśko, Joanna Mazur-Różycka, Zbigniew Staniak
PURPOSE: The aim of this study was to identify the determinants of peak power achieved during vertical jumps in order to clarify relationship between the height of jump and the ability to exert maximum power. METHODS: One hundred young (16.8±1.8 years) sportsmen participated in the study (body height 1.861 ± 0.109 m, body weight 80.3 ± 9.2 kg). Each participant performed three jump tests: countermovement jump (CMJ), akimbo countermovement jump (ACMJ), and spike jump (SPJ)...
2018: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29629620/differential-training-loads-and-individual-fitness-responses-to-pre-season-in-professional-rugby-union-players
#9
Shaun J McLaren, Andrew Smith, Jonathan D Bartlett, Iain R Spears, Matthew Weston
We aimed to compare differentiated training loads (TL) between fitness responders and non-responders to an eight-week pre-season training period in a squad of thirty-five professional rugby union players. Differential TL were calculated by multiplying player's perceptions of breathlessness (sRPE-B) and leg muscle exertion (sRPE-L) with training duration for each completed session. Performance-based fitness measures included the Yo-Yo Intermittent Recovery Test Level 1 (YYIRTL1), 10-, 20-, and 30-m linear sprint times, countermovement jump height (CMJ) and predicted one-repetition maximum back squat (P1RM Squat)...
April 9, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29628898/postactivation-potentiation-of-the-plantar-flexors-does-not-directly-translate-to-jump-performance-in-female-elite-young-soccer-players
#10
Olaf Prieske, Nicola A Maffiuletti, Urs Granacher
High-intensity muscle actions have the potential to temporarily improve muscle contractile properties (i.e., postactivation potentiation, PAP) thereby inducing acute performance enhancements. There is evidence that balance training can improve performance during strength exercises. Taking these findings together, the purpose of this study was to examine the acute effects of a combined balance and strength (B+S) exercise vs. a strength only (S) exercise on twitch contractile properties, maximum voluntary strength, and jump performance in young athletes...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29625360/correlation-between-quadriceps-and-hamstrings-inter-limb-strength-asymmetry-with-change-of-direction-and-sprint-in-u21-elite-soccer-players
#11
Giuseppe Coratella, Marco Beato, Federico Schena
The aim of this study was to investigate the relationship between in quadriceps and hamstrings inter-limb strength asymmetry and change of direction, sprinting and jumping abilities in U21 elite soccer players. Twenty-seven soccer players volunteered for this study. Isokinetic quadriceps and hamstrings peak torque was measured at high and low angular velocities, both in concentric and eccentric modalities. Performance in agility T-test, 20 + 20 m shuttle-test, 10 m and 30 m sprint, squat jump (SJ) and counter-movement jump (CMJ), were measured...
April 3, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29624621/hormonal-and-neuromuscular-responses-during-a-singles-match-in-male-professional-tennis-players
#12
Álvaro López-Samanes, Jesús G Pallarés, Alberto Pérez-López, Ricardo Mora-Rodríguez, Juan F Ortega
We sought to measure the response of cortisol concentrations around a professional tennis match and its association with hydration status and neuromuscular performance. Nine professional male tennis players were tested in a rest day, and 2-week after, during the first match of a professional tournament played in a clay-court. Salivary concentrations of cortisol (SalCC) were measured in a resting day (9:00 am and 8:00 pm), at the match day (9:00 am and 8:00 pm) and immediately before and after the match. Hydration status was assessed before the match (urine specific gravity; USG) while fluid turnover was tracked during the match...
2018: PloS One
https://www.readbyqxmd.com/read/29619797/acute-neuromuscular-responses-to-short-and-long-roundhouse-kick-striking-paces-in-professional-muay-thai-fighters
#13
Giuseppe Cimadoro, Ryan Mahaffey, Nicolas Babault
BACKGROUND: Muay Thai fighters strongly rely on the use of the roundhouse kick due to its effectiveness (i.e. power) and implications on the final score. Therefore, different striking tempos at full power are used during training as a method to enhance kicking power. However, the neuromuscular responses are unknown. Thus, the goal of this study was to investigate neuromuscular responses to a single bout of shorter (every second = H1) and longer (every 3s = H3) kick striking time intervals, measured with the countermovement jump (CMJ)...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29599872/responsiveness-of-the-countermovement-jump-and-handgrip-strength-to-an-incremental-running-test-in-endurance-athletes-influence-of-sex
#14
Felipe García-Pinillos, Pedro Delgado-Floody, Cristian Martínez-Salazar, Pedro Á Latorre-Román
The present study analyzed the acute effects of an incremental running test on countermovement jump (CMJ) and handgrip strength performance in endurance athletes, considering the effect of post-exercise recovery time and sex. Thirty-three recreationally trained long-distance runners, 20 men and 13 women, participated voluntarily in this study. The participants performed the Léger test, moreover, the CMJ and handgrip strength tests were carried out before and after the running test and during different stages of recovery (at the 1st min of recovery (posttest1), 5th min of recovery (posttest2), and 10th min of recovery (posttest3))...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29584530/monitoring-training-load-recovery-and-performance-of-brazilian-professional-volleyball-players-during-a-season
#15
Paula B Debien, Marcelly Mancini, Danilo R Coimbra, Daniel G S de Freitas, Renato Miranda, Maurício G Bara Filho
PURPOSE: The aim of this study is to describe and analyze the distribution of internal training load (ITL), recovery, and physical performance of professional volleyball players throughout one season. METHODS: 15 male professional Brazilian volleyball players participated in this study. The session rating of perceived exertion (session-RPE) and Total Quality Recovery (TQR) score were collected daily for 36 weeks. The session-RPE was collected after each training session and the TQR before the first session of the day...
March 27, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29570578/evaluation-of-seasonal-changes-in-fitness-anthropometrics-and-body-composition-in-collegiate-division-ii-female-soccer-players
#16
Ashley N Peart, Clayton R Nicks, Michael Mangum, Brian M Tyo
The purpose of this study was to investigate anthropometrics, body composition, aerobic and anaerobic fitness of collegiate Division II female soccer players throughout a calendar year. Eighteen (20 ± 0.9y) NCAA division II female soccer players from the same team participated in the study. Anthropometrics and body composition variables were assessed in addition to the Counter Movement Jump (CMJ), Wingate Anaerobic Test (WAT), and peak oxygen uptake (VO2peak). Data were collected over five time points: end of competitive seasons (ECS1 and ECS2), beginning of off-season (BOS), end of off-season (EOS), and pre-season (PS)...
March 22, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29570575/evaluation-of-the-most-reliable-procedure-of-determining-jump-height-during-the-loaded-countermovement-jump-exercise-take-off-velocity-vs-flight-time
#17
Alejandro Pérez-Castilla, Amador García-Ramos
This study aimed to compare the reliability of jump height between the two standard procedures of analysing force-time data (take-off velocity [TOV] and flight time [FT]) during the loaded countermovement (CMJ) exercise performed with a free-weight barbell and in a Smith machine. The jump height of 17 men (age: 22.2 ± 2.2 years, body mass: 75.2 ± 7.1 kg, height: 177.0 ± 6.0 cm) was tested in four sessions (twice for each CMJ type) against external loads of 17, 30, 45, 60, and 75 kg. Jump height reliability was comparable between the TOV (coefficient of variation [CV]: 6...
March 22, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29570574/sequencing-effects-of-plyometric-training-applied-before-or-after-regular-soccer-training-on-measures-of-physical-fitness-in-young-players
#18
Rodrigo Ramirez-Campillo, Cristian Alvarez, Paulo Gentil, Irineu Loturco, Javier Sanchez-Sanchez, Mikel Izquierdo, Jason Moran, Fabio Y Nakamura, Helmi Chaabene, Urs Granacher
To compare the effects of short-term (i.e., 7 week) plyometric training applied before (PJT-B) or after (PJT-A) soccer practice on components of physical fitness in young soccer players, a single-blind randomized controlled trial was conducted. Post-pubertal boys aged 17.0±0.5 years were allocated to three groups: PJT-B (n=12), PJT-A (n=14), and control (CON; n=12). The outcome measures included tests to evaluate 20-m speed, standing long jump [SLJ], squat jump [SJ], countermovement jump [CMJ], and drop jump [DJ], 20-m multistage shuttle running speed [MSSRT], and Illinois change of direction speed [ICODT]...
March 22, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29556489/training-effects-of-the-fifa-11-kids-on-physical-performance-in-youth-football-players-a-randomized-control-trial
#19
Carlos Pomares-Noguera, Francisco Ayala, Francisco Javier Robles-Palazón, Juan F Alomoto-Burneo, Alejandro López-Valenciano, José L L Elvira, Sergio Hernández-Sánchez, Mark De Ste Croix
Objective: To analyze the training effects of the FIFA 11+ kids on several parameters of physical performance in male youth football players. Materials and methods: Twenty-three youth players were randomized within each team into two groups (control vs. intervention). The intervention group performed the FIFA 11+ kids programme 2 times a week for 4 weeks; the control groups completed their normal warm-up routines. Thirteen physical performance measures {range of motion (hip, knee, and ankle joints), dynamic postural control (measured throughout the Y balance test), 20 m sprint time, slalom dribble with a ball, agility, vertical jumping height [counter movement jump (CMJ) and drop jump (DJ)], horizontal jump distance, accuracy when volleying a ball [measured throughout the Wall Volley test]} were assessed...
2018: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29543701/cross-sectional-and-longitudinal-examination-of-exercise-capacity-in-elite-youth-badminton-players
#20
Christian Møller Madsen, Benjamin Badault, Lars Nybo
Badminton-specific speed and endurance performance was evaluated in both cross-sectional and longitudinal studies of elite youth players and compared to the physiological capacities of world top-50 singles players.The cross-sectional study involved ten males in the category U15 (<15 years), ten U17, nine U19 and four senior elite players. They performed 30-m sprint, counter-movement jump (CMJ) and badminton-specific speed (B-SPEED) and endurance (B-ENDURANCE) tests. The longitudinal data were collected for ten U15 players with 1- and 2-year follow-up measures...
March 13, 2018: Journal of Strength and Conditioning Research
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