This is an excerpt from NSCA's Essentials of Sport Science by NSCA -National Strength & Conditioning Association, Duncan N. French & Lorena Torres-Ronda.

Sprinting is a key component for many individual and team sports. Therefore, to enhance sprint performance, various training methods are widely used by coaches and practitioners, including maximum sprint speed and resisted sprint training. Resisted sprinting with sled towing is a method that has recently received considerable attention from the sport science community. However, to date, no consensus exists regarding its acute and chronic effects in team sport athletes. This narrative review aimed to (a) review and analyze the mechanics of sprinting under unresisted and resisted conditions with a specific focus on team sport disciplines; (b) provide a thorough and applied discussion on the importance of considering acute and chronic effects of sled loading on technique, electromyographic activity, and force production, as well as on the role of muscle architecture and neural factors in sled training; (c) analyze the effects of increasing sled loads during acceleration and maximum velocity phases on contact and flight phases, while concomitantly examining kinetic, kinematic, and neuromuscular aspects, because all these factors affect each other and cannot be properly understood in isolation.

Developing safe and effective exercise training programs requires the application of abundant training variables and the implementation of appropriate progression for each variable. Importantly, the outcomes of each training program are the product of these variables and their progression, so practitioners are keen to select methodologies and overload strategies that effectively support their target training outcomes. One such training variable is mechanical loading, which describes the forces of gravity, resistance, and muscle contraction and how these forces affect musculoskeletal adaptations. Numerous research articles and texts have been published regarding mechanical loading and its effects on exercise adaptations; however, these findings can be arduous to organize, which requires additional time investment by professionals. Developing a succinct system is critical because practitioners face clients and patients with a wide range of physical skills and challenges, and having an easily referenced loading guide may assist them in designing appropriate strength and conditioning or rehabilitation programs. Thus, the purpose of this review is to define and describe the mechanical loading continuum and its individual components to better assist the practitioner in identifying appropriate exercise modes and progression strategies.

An emerging body of research has explored the potential ergogenic effects of noninvasive interset recovery strategies involving the application of cold substances to the extremities distal to exercising muscles (e.g., palms of the hands or the soles of the feet). It was suggested that such strategies may acutely enhance resistance training (RT) performance by augmenting excitation and motor unit recruitment of the working muscles through enhanced stimulation of the central nervous system, resulting in greater force production and the ability to perform more repetitions to fatigue. Moreover, peripheral stimuli such as distal cooling may acutely reduce the sensation of distress during RT, allowing individuals to tolerate more exercise and achieve higher training volumes. Although there is some evidence that interset distal cooling confers an ergogenic benefit during RT, certain methodological considerations, a paucity of longitudinal research, and contrasting findings call into question its effectiveness. Thus, the purpose of this review is to assess the current evidence regarding the effects of interset palm and sole cooling on RT performance outcomes.

Canoe slalom requires technical ability, well-developed energetics, a high level of maximum force production, and range of movement to perform a variety of complex paddle stokes, while maneuvering through a challenging whitewater course. The strength and conditioning (S&C) coach should provide strategic direction across a network or department including S&C coaches working toward identified outcomes and measures. S&C coaches should collaborate with a multidisciplinary support team (i.e., sport coaches, physiotherapists, physiologists, etc.) to develop a technical framework. The technical framework may allow for development of training strategies that provide a clear breakdown of the outcomes, adaptations, exercises, and testing methods. The current article articulates this process related to a canoe slalom national performance program. You must pass this quiz (by answering at least 7 out of 10 questions correctly) to earn 0.2 CEU in Category D. Upon passing, your CEUs will be recorded automatically. You are given only ONE attempt per purchase to pass the quiz.

This excerpt from NSCA’s Essential of Tactical Strength and Conditioning explores the neural and muscular adaptations to training over time.

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