Introduction: The purpose of this study was to examine the changes in neuromuscular, perceptual and hormonal measures following professional rugby league matches during different length between-match microcycles. Methods: Twelve players from same team were assessed for countermovement jump (CMJ) performance (fight time relative power), responses (fatigue, well-being muscle soreness) salivary hormone (testosterone [T] cortisol [C]) levels 5, 7 9 d training All prescribed by club coaches...

Abstract Mental fatigue is a psychobiological state caused by prolonged periods of demanding cognitive activity shown to negatively influence physical performance. Variation exists across the literature regarding manifestations and impact mental fatigue; with little knowledge domain‐specific in elite sport. The difficulties defining may explain why it not consistently assessed coaching or support staff. aim this study was therefore investigate athlete staff understandings Nine focus group...

James, LP, Roberts, LA, Haff, GG, Kelly, VG, and Beckman, EM. Validity reliability of a portable isometric mid-thigh clean pull. J Strength Cond Res 31(5): 1378-1386, 2017-This study investigated the test-retest criterion validity force-time curve variables collected through pull (IMTP) device equipped with single-axial load cell. Fifteen males ≥6 months resistance training experience attended two testing sessions. In each session, participants performed an IMTP in 2 separate conditions...

The purpose of this investigation was to determine whether the magnitude adaptation integrated ballistic training is influenced by initial strength level. Such information needed inform resistance guidelines for both higher- and lower-level athlete populations. To end, two groups distinctly different levels (stronger: one-repetition-maximum (1RM) squat = 2.01 ± 0.15 kg·BM-1 ; weaker: 1.20 0.20 ) completed 10 weeks incorporating weightlifting derivatives, plyometric actions, exercises....

To determine whether the maximal strength, impulse, and power characteristics of competitive mixed-martial-arts (MMA) athletes differ according to competition level.Twenty-nine male semiprofessional amateur MMA competitors were stratified into either higher-level (HL) or lower-level (LL) performers on basis grade success. The 1-repetition-maximum (1RM) squat was used assess lower-body dynamic a spectrum power, force, velocity variables evaluated during an incremental-load jump squat. In...

This study examined agreement between self-perceived sleep and estimated via activity monitors in professional rugby league athletes. 63 athletes, from three separate teams wore actigraphy for 10.3 ± 3.9 days. During the monitoring period, ratings of perceived quality (on a 1–5 1–10 Likert scale), an estimate duration were recorded daily. Agreement was using mean bias, Pearson correlation (r) typical error (TEE). 641 nights recorded, with very large, positive observed subjective (r = 0.85),...

Abstract Background Research into esports suggests that e’athletes experience physiological stressors and demands during competition training. The of are poorly understood need to be investigated further inform future training guidelines, optimise performance outcomes, manage e’athlete wellbeing. This research aimed quantify the metabolic rate gameplay compare this outcome with heart variability within expert e’athletes. Results Thirteen healthy male participants ranked top 10% their...

summary The training and match demands in the competition phase team sport can vary dramatically depending on quality of opposition, number days between games, location. simple model described this article be used to predict difficulty guide prescription future loads during in-season sports.

Abstract James, LP, Connick, M, Haff, GG, Kelly, VG, and Beckman, EM. The countermovement jump mechanics of mixed martial arts competitors. J Strength Cond Res 34(4): 982–987, 2020—Gross (CMJ) performance measures are greater in higher-level (MMA) competitors than lower-level (LL) Differences CMJ kinetics kinematics throughout the action may explain those differences, but this remains to be investigated. After warm-up familiarization, 27 MMA (divided into 2 groups based on competitive...

Mental fatigue is referred to as a psychophysiological or neurobiological state caused by prolonged periods of demanding cognitive activity. Sports and exercise science research have investigated the effects experimentally induced mental on performance, with mixed results. It has been suggested that negative cognition performance in laboratory studies could translate impaired sport performance. However, it remains unclear if impairments are due how may differ from physical fatigue. Fatigue...

Sprint acceleration is critical for success in team sports. This study aimed to (a) establish the test–retest reliability of a novel method assessing 20 m sprint performance and (b) determine magnitude meaningful change times. Thirty highly trained male sport athletes completed testing (2 × [separated by 5 min]) on two separate occasions, separated 7 days. times (0–20, 0–10, 10–20 m) were recorded using infrared timing gates (Brower Timing Systems, West Valley City, UT, USA) connected motion...

THE MIXED MARTIAL ARTIST REQUIRES DEVELOPMENT OF A BROAD SCOPE DIVERGENT PHYSIOLOGICAL ABILITIES TO COMPETE SUCCESSFULLY. MINIMIZE ANY POTENTIAL INTERFERENCE EFFECTS AND OPTIMIZE TRAINING ADAPTATIONS, PERIODIZED PLAN IS NEEDED MANAGE INTEGRATION THIS SPORT'S MANY STRESSORS. ARTICLE PROVIDES GUIDELINES PRACTICAL EXAMPLES FOR STRENGTH CONDITIONING COACH.

Abstract Hayes, MJ, Spits, DR, Watts, DG, and Kelly, VG. Relationship between tennis serve velocity select performance measures. J Strength Cond Res 35(1): 190–197, 2021—The purpose of this study was to determine whether there a relationship speed isometric midthigh pull (IMTP) kinetic variables: countermovement jump (CMJ) height, shoulder internal external rotation strength, anthropometric measures in elite adolescent players. Twenty-one junior players from the Tennis Australia National...

This study examined the sleep intra-individual variability (IIV) of rugby league athletes across senior and junior levels during one week competitive season. Forty-five elite senior, sub-elite each wore actigraphy monitors for seven days season, completed a subjective diary morning upon waking. Linear mixed models were used to assess differences in measures between playing levels. Intra-individual standard deviations measure calculated athlete determine their respective IIV, allowing IIV...