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Considering the great popularity of eccentric-based training, the purpose of this review is to first provide the scientific rationale for its use; second, summarize the eccentric-based training modalities that can be used; and finally, offer practical recommendations on how to implement eccentricbased modalities to enhance sports performance. The molecular and neural mechanisms underlying eccentric actions are partially distinct from those of concentric and isometric actions. During eccentric actions, theories suggest a strain-induced modulation of actin-myosin interactions at the crossbridge level, activation of structural protein titin, and winding of titin on actin. Eccentric acute physiological responses differ from concentric exercise responses, including variations in neuromuscular, metabolic, hormonal, and anabolic signaling. Eccentric training elicits greater improvements in muscle strength, power, and stretch-shortening cycle function compared with concentric-only or traditional resistance training. Therefore, eccentric-based training can lead to unique neuromuscular (e.g., improved coordination of motor units) and morphological (e.g., increased muscle fascicle length and enhanced distal cross-sectional area) adaptations that could play a key role in sport performance. Practitioners may implement eccentric exercises with external loads, fully eccentric-based exercises (e.g., Nordic hamstring curl), accentuated eccentric loading, flywheel resistance exercise, and plyometrics to develop specific physical adaptations in line with their goals. Eccentric work (e.g., for hamstrings) can be obtained during other exercises such as downhill running tasks, decelerations, and sprinting activities. Practitioners need to be aware that no single “silver bullet” training modality exists; consequently, practitioners should use a combination of eccentric-based training approaches with their athletes to obtain the desired adaptations.

Taurine is a well-known free amino acid that has gained prominence in recent years despite its little or no role in protein formation. Few studies on the ergogenic effect of taurine exist with inconsistent results. The answer to the question of whether performance markers demonstrate the benefit of taurine remains unclear. This study aimed to reach a consensus about whether taurine supplementation is effective on aerobic (time to exhaustion [TTE], maximal oxygen uptake [V̇O2max], and rating of perceived exertion) and anaerobic (power outputs, fatigue index, jumping, and blood lactate level) performance outputs. Google Scholar, PubMed databases, clinical trial websites, and gray literature were reviewed until November 2021. Mean differences (MDs) were pooled using random or fixed-effects models according to the heterogeneity degree of the related output. Although 18 studies were detected for the meta-analysis between 2001 and 2021, 16 studies were grouped. Only randomized controlled trials (single or double-blind) were considered. Taurine supplementation had a significant effect on vertical (MD 5 3.60; 95% confidence interval [CI] [2.32 to 4.89], p , 0.00001) and countermovement (MD 5 8.50; 95% CI [4.78 to 12.22], p , 0.00001) jump performance when compared with a placebo group. Taurine supplementation had no significant effect on the V̇O2max level and rate of perceived exertion (respectively, MD 5 20.54 mL/kg/min; 95% CI [26.84 to 5.75], p 5 0.87; MD 5 20.24; 95% CI [20.74 to 0.27], p 5 0.35) when compared with a placebo group. Overall, it looks to be effective for jumping performance and TTE. Taurine supplementation may be useful for people who want to improve these performance outputs.

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Dr. Tim Suchomel gives the annual Dr. Mike Stone Lecture at the 2021 National Conference and discusses muscular strength in detail, including its effect on performance variables, effective training progressions, and strategies for athletes through the whole training spectrum.

From the 2022 NSCA’s Coaches Conference, Head of Combat Sports at the Star, Matt Crawley, discusses the importance of sleep in athletes, examines some high performance case studies involving sleep tracking, and provides sleep health resources for strength and conditioning coaches.

Concurrent training (CT), which combines resistance exercise and energy systems conditioning, is the default approach to preparation in high-intensity intermittent (“stop and go”) team sports. This review provides an overview of CT, emphasizing its complexities and challenges in managing fatigue and optimizing performance. These complexities are specifically compounded by the variability in game demands across the season, where the presence of intensified and nonintensified competition periods necessitates a flexible and adaptive training approach. In this context, there are essential training variables to consider, including intensity, volume, session order, and recovery intervals between sessions. In addition, nontraining variables such as travel, sleep, and nutrition play a role in the fatigue experienced while training and competing. These variables interact to influence acute performance and training adaptations and can be strategically adjusted by strength and conditioning practitioners. The aim of this review is to provide a comprehensive understanding of fatigue management for practitioners in team sports, emphasizing the complexities and challenges of CT and offering simplified practical recommendations for adjusting training variables within any given microcycle.

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