Conditioning Coaches Research Articles

Positional Differences in the Most Demanding Scenarios of External Load Variables in Elite Futsal Matches.

The aims of this study were to analyze the peak physical demands in elite futsal by quantifying the most demanding scenarios of match play and to identify the differences between playing positions (defenders, wingers, and pivots) and the seasonal trend for five different rolling average time windows (30, 60, 120, 180, and 300 s). The most demanding scenarios of external load from distance, speed, acceleration, and deceleration variables were obtained from 14 elite futsal players using a local positioning system during 15 official matches in the premier Spanish Futsal League (2018–2019 season). The results showed an extremely large effect of the time window for all dependent variables in all positional groups. Another important finding of this study was that, in regard to the seasonal trend, only defenders reported clear moderate-large positive trends for high-speed running (>18 km⋅h–1) efforts, high-acceleration efforts, and high-deceleration efforts. Finally, moderate-large individual differences in player means for all dependent variables and clear differences between games for most dependent variables were found, suggesting how likely contextual factors may exert an influence on how “demanding” the most demanding scenarios are. The findings of this study provide coaches and strength and conditioning coaches further knowledge of the peak physical demands in elite futsal competition. This valuable information may lead to a more precise position-specific training prescription.

Monitoring Training Loads in Basketball: A Narrative Review and Practical Guide for Coaches and Practitioners

ABSTRACT Monitoring training load provides information about the physical demands of the sport in which athletes are competing. Strength and conditioning coaches need to use this information to periodize and make decisions on training to optimize performance and prevent injuries. The following narrative review presents the current state of knowledge on monitoring external and internal loads in basketball. The reviewed articles were classified according to the sample represented, considering 3 groups: elite, subelite, and young basketball players. In addition, we analyzed the recording procedures and methodology used in technological and ecological terms. Articles were classified, considering what was monitored and the context in which it was monitored. These settings included competition, training, and small-sided games. Performance and sports injury variables were also taken into account in our review.

Implementing Strength Training Strategies for Injury Prevention in Soccer: Scientific Rationale and Methodological Recommendations.

Due to the negative effects that injuries have on performance, club finances, and long-term player health (permanent disability after a severe injury), prevention strategies are an essential part of both sports medicine and performance. Purpose: To summarize the current evidence regarding strength training for injury prevention in soccer and to inform its evidence-based implementation in research and applied settings. Conclusions: The contemporary literature suggests that strength training, proposed as traditional resistance, eccentric, and flywheel training, may be a valid method to reduce injury risk in soccer players. Training strategies involving multiple components (eg,a combination of strength, balance, plyometrics) that include strength exercises are effective at reducing noncontact injuries in female soccer players. In addition, the body of research currently published supports the use of eccentric training in sports, which offers unique physiological responses compared with other resistance exercise modalities. It seems that the Nordic hamstring exercise, in particular, is a viable option for the reduction of hamstring injuries in soccer players. Moreover, flywheel training has specific training peculiarities and advantages that are related to the combination of both concentric and eccentric contraction, which may play an important role in injury prevention. It is the authors' opinion that strength and conditioning coaches should integrate the strength training methods proposed here in their weekly training routine to reduce the likelihood of injuries in their players; however, further research is needed to verify the advantages and disadvantages of these training methods to injury prevention using specific cohorts of soccer players.

Personal, Work-, and Client-Related Burnout Within Strength and Conditioning Coaches and Personal Trainers.

Snarr, RL and Beasley, VL. Personal, work-, and client-related burnout within strength and conditioning coaches and personal trainers. J Strength Cond Res 36(2): e31-e40, 2022-The purpose of this investigation was to examine the prevalence and influencing factors of personal, work-related, and client-related burnout within strength and conditioning coaches (SCCs) and personal trainers (PTs). Two hundred fifty-six SCCs (n = 141) and PTs (n = 115) completed the Copenhagen Burnout Inventory (CBI), a 19-item survey, measuring 3 subscales of personal, work-related, and client-related burnout. Information regarding other burnout-related factors (i.e., job satisfaction, social support, fitness level, and mental toughness) was solicited through single-item or multiple-item questionnaires. Correlational analyses and independent t-tests were conducted to assess associations and between-group differences between burnout and all continuous factors. Seventy-one subjects completed the survey before March 2020; after which, a worldwide pandemic (i.e., COVID-19) occurred possibly affecting employment workloads and work-related stress. Thus, post hoc analyses were conducted to assess differences in burnout scores pre-COVID-19 and post-COVID-19. Using a CBI subscale cutoff score of ≥50, fitness professionals reported 32.8% of personal burnout, 28.5% work-related burnout, and 18.0% client-related burnout. Factored by occupation, SCCs reported 32.6% personal burnout, 27.7% work-related burnout, and 18.4% client-related burnout. Within PTs, 33.0% reported personal burnout, 29.6% reported work-related burnout, and 17.4% reported client-related burnout. Higher levels of burnout, across all scales, were observed in those who were PTs, women, unmarried, living alone, would not choose to be a fitness professional again, and took the survey post-COVID as compared to their respective counterparts. Findings suggest that fitness professionals are not exempt from the stressors associated with personal and occupational burnout. Strength and conditioning coaches and PTs may reduce the risk of burnout by increasing social support, continuing education, and allowing for personal-care time with the intention of buffering these factors.

Current perceptions of strength and conditioning coaches use of sled tow training

The purpose of this study was to assess current perceptions of strength and conditioning coaches’ use of sled towing (ST) as part of their training programs. One-hundred and twenty-five coaches responded to a survey of their ST practices. Themes investigated included the primary purpose and usefulness of using ST, the loads used in short and long distances, rest times between sprints, total volume of ST sprints per session, frequency of ST activity each month, and whether coaches engaged in force-velocity profiling in ST sprints. Eighty percent of coaches either agreed or strongly agreed that ST is a useful intervention tool for improving athletic performance. Speed strength was the physiological adaptation most sought after to improve ( n = 75) followed by power ( n = 72). Bodyweight (BW) loads of 20% were the most common across all distances. The two most common rest times given between each ST repetition were one to two minutes ( n = 37) and two to three minutes ( n = 37). The most common volume responses for individual training sessions were five to eight sprints ( n = 52) and three to five times per month, respectively. These data suggest strength and conditioning coaches view ST as an integral part of programming, primarily use loads of 20% BW for both short and long sprints and seek to optimize a number of different physiological adaptations. The majority of coaches have a favorable view of ST (88%); however, current training parameters used by strength and conditioning coaches may be inadequate to achieve their desired adaptations.

Assessing Group-Based Changes in High-Performance Sport. Part 1: Null Hypothesis Significance Testing and the Utility of p Values

ABSTRACT The role of a strength and conditioning coach (SCC) has evolved over the last 10 years to accommodate the large influx of data now available. As such, today's SCC must extend their skill set to include data analysis, understanding the validity and utility of p values, effect sizes, confidence intervals, and terms such as the smallest worthwhile change, and minimal difference. The aim of part one of this 2-part review is to define and discuss the utility of null hypothesis significance testing, p values, and error rates. In part 2, we introduce effect sizes, measures of variability, and confidence intervals, culminating in recommendations as to which may be the most viable options within the context of performance-based sport, and thus potential methods to report group-based changes.

Nontraumatic Injuries in the NCAA: Collegiate Football Strength Coaches Should Exercise Caution this Off-Season

Nontraumatic Injuries in the NCAA: Collegiate Football Strength Coaches Should Exercise Caution this Off-Season

Practices of Strength and Conditioning Coaches: A Snapshot From Different Sports, Countries, and Expertise Levels.

Weldon, A, Duncan, MJ, Turner, A, LaPlaca, D, Sampaio, J, and Christie, CJ. Practices of strength and conditioning coaches: a snapshot from different sports, countries, and expertise levels. J Strength Cond Res 36(5): 1335-1344, 2022-This study describes the practices of strength and conditioning coaches (SCCs) from different sports, countries, and expertise levels. One hundred fifty-six SCCs (31.9 ± 8.9 years old) completed an online survey, consisting of 40 questions (36 fixed response and 4 open-ended), with 8 sections as follows: (a) background information, (b) muscular strength and power development, (c) speed development, (d) plyometrics, (e) flexibility development, (f) physical testing, (g) technology use, and (h) programming and any additional comments. Responses were received from 48 sports and 17 countries. This study provides exploratory evidence incorporating responses primarily in soccer (45%), track and field (30%), volleyball (23%), golf (17%), and tennis (17%). A bachelor's degree or higher were held by 99% of SCCs, of which 94% were in a sports science-related field, and 71% held a strength and conditioning related certification or accreditation. Periodization strategies and physical testing were used by 96% and 94% of SCCs respectively. The hang clean (82%), power clean (76%), and clean high pull (63%) were the most prescribed Olympic weightlifting exercises. Multiple hops/lunges (84%) were the most prescribed plyometrics exercises. For open-ended questions, 40% of SCCs wanted to integrate more technology into their programs and 30% believed technology will be the main future trend. Strength and conditioning coaches from different sports, countries, and expertise levels can use the information presented in this study to review their current practices and provide a source of new ideas for diversifying or modifying future practices.

Contemporary practices of strength and conditioning coaches in professional cricket

This study describes the contemporary practices of strength and conditioning (S&C) coaches in male professional cricket. Thirty-three S&C coaches working with international and professional club teams across seven countries completed an online survey. The survey consisted of 45 questions (35 fixed responses and 10 open-ended), with eight sections: (a) background information, (b) muscular strength and power development, (c) speed development, (d) plyometrics, (e) flexibility development, (f) physical testing, (g) technology use, and (h) programing. Most S&C coaches were educated to degree level (97%) or higher, with 91% of degrees being in a sports science-related field. Furthermore, 73% held S&C and 40% cricket coaching certifications. Isometric type resistance training exercises (94%) were frequently programed by S&C coaches, with squats and deadlifts (including variations) deemed the most important strength development exercises. Ratings of perceived exertion (58%) was most used for determining set loads. Hang clean (64%) and multiple hops/lunges (85%) were the most prescribed Olympic weightlifting and plyometric exercises. Speed gates (85%) were the most used technology-based equipment. Open-ended questions revealed, 45% of S&C coaches believed time constraints, scheduling and fixtures are the main issues faced in their role. Position-specific demands (61%) was the predominant method used for individualizing players training strategies. The information presented in this study is valuable for those pursuing or currently working as an S&C coach in professional cricket to align, compare, and explain their practices. Furthermore, will provide insight for the wider athlete support team (e.g., sports coaches and physiotherapists) on the practices of S&C coaches.

Athlete Workloads During Collegiate Women's Soccer Practice: Implications for Return to Play

Athlete monitoring via wearable technology is often used in soccer athletes. Although researchers have tracked global outcomes across soccer seasons, little information exists on athlete loads during individual practice drills. Understanding these demands is important for athletic trainers in making decisions about return to play. To provide descriptive information on total distance, total player load (PL), total distance per minute, and PL per minute for practice drill structures and game play by player position among female soccer athletes across a competitive season. Retrospective observational study. National Collegiate Athletic Association Division I university. A total of 32 female collegiate soccer players (age = 20 ± 1 years, height = 168.75 ± 4.28 cm). Athletes wore a single global positioning system and triaxial accelerometer unit during all practices and games in a single soccer season. Individual practice drills were labeled by the team's strength and conditioning coach and binned into physical, technical and tactical skills and large- and small-sided competition drill structures. Descriptive analyses were used to assess the median total distance, total PL, total distance per minute, and PL per minute by drill structure and player position (defender, forward or striker, and midfielder) during practices and games. Large- and small-sided competition drills imposed the greatest percentage of workload across all measures for each position (approximately 20% of total practice), followed by physical drills. When comparing technical and tactical skills drills, we found that technical skills drills required athletes to cover a greater distance (approximately 17% for technical skills and 15% for tactical skills), and tactical skills drills required higher play intensity during practices across all positions (approximately 18% for technical skills and 13% for tactical skills). Defenders had the highest median PL outcomes of all positions during practices. Different practice drill types imposed various levels of demands, which simulated game play, on female soccer athletes. Athletic trainers and other clinicians may use this information in formulating objective return-to-play guidelines for injured collegiate women's soccer players.

The Development and Evaluation of a Training Monitoring System for Amateur Rugby Union

A training monitoring system (TMS) should be both attainable and scientifically grounded; however, the optimal method of monitoring training is not yet fully understood. The purpose of this study was to develop and evaluate an online TMS for amateur rugby union. The experimental approach to the problem consisted of five phases: (1) establishing the current training and training load (TL) monitoring practices of amateur rugby union teams, (2) designing and developing the TMS, (3) recruiting teams and subsequently introducing the TMS, (4) supporting the strength and conditioning (S&C) coaches using the TMS, and (5) evaluating the TMS. The findings of this study support the use of an online TMS as a useful and effective method of facilitating training prescription and design in an effort to reduce injury risk and enhance performance. The main barriers impeding player compliance are the lack of feedback on their data and evidence of its use in training design, coaching, and prescription. The effectiveness of the system is dependent on the extent to which the associated challenges are mitigated to ensure quality and consistent data. However, this study offers a method of monitoring training that can be effective while also establishing pitfalls to avoid for both practitioners and researchers alike.

Contemporary practices of strength and conditioning coaches in professional soccer.

This study describes the contemporary practices of strength and conditioning coaches in professional soccer. Fifty-two strength and conditioning coaches from professional leagues across 18 countries completed an online survey, consisting of 45 questions, with eight sections: (a) background information, (b) muscular strength and power development, (c) speed development, (d) plyometrics, (e) flexibility development, (f) physical testing, (g) technology use, and (h) programing. A frequency analysis was used to assess and report responses to fixed response questions, and thematic-analysis used for open-ended questions to create clear, identifiable and distinct themes. All strength and conditioning coaches were educated to degree level or higher, 65% held strength and conditioning certifications and 54% held soccer coaching certifications. Concentric (100%) and eccentric (98%) modes of resistance were the most commonly prescribed, whereas the squat (including variations) (52%) was deemed the most important exercise for soccer players. Hang clean (33%) and multiple hops/lunges (89%) were the most programed Olympic weightlifting and plyometric exercises. Global Positioning Systems (94%) were the most utilized technology-based equipment. Time, scheduling and fixtures were the biggest issues faced, which made it difficult to periodize training programs and apply appropriate training loads. Furthermore, strength and conditioning coaches would like to further integrate technology to comprehensively monitor and test players, while also believing that technology will continue to be developed and integrated in the future. Strength and conditioning coaches from professional soccer can use the information from this study to review current practices and also provide ideas for diversifying or modifying future practices.

Inertial flywheel knee- and hip-dominant hamstring strength exercises in professional soccer players: Muscle use and velocity-based (mechanical) eccentric overload.

The primary aim of the present study was to analyze mechanical responses during inertial knee- and hip-dominant hamstring strengthening exercises (flywheel leg-curl and hip-extension in conic-pulley), and the secondary aim was to measure and compare regional muscle use using functional magnetic resonance imaging. Mean power, peak power, mean velocity, peak velocity and time in the concentric (CON) and eccentric (ECC) phases were measured. The transverse relaxation time (T2) shift from pre- to post-exercise were calculated for the biceps femoris long (BFl) and short (BFs) heads, semitendinosus (ST) and semimembranosus (SM) muscles at proximal, middle and distal areas of the muscle length. Peak and mean power in flywheel leg-curl were higher during the CON than the ECC phase (p<0.01). ECC peak power was higher than CON phase (p<0.01) in conic-pulley hip-extension exercise, while mean power was higher during the CON than ECC phase (p<0.01). Flywheel leg-curl showed a higher T2 values in ST and BFs and BFl (p<0.05), while the conic-pulley hip-extension had a higher T2 values in the proximal region of the ST and BFl (p<0.05). In conclusion, ECC overload was only observed in peak power during the conic-pulley hip-extension exercise. Flywheel leg-curl involved a greater overall use of the 4 muscle bellies, more specifically in the ST and BFs, with a selective augmented activity (compared with the conic-pulley) in the 3 regions of the BFs, while conic-pulley hip-extension exercise selectively targeted the proximal and medial regions of the BFl. Physiotherapists and strength and conditioning coaches should consider this when optimizing the training and recovery process for hamstring muscles, especially after injury.

Sports Psychiatry: An Update and the Emerging Role of the Sports Psychiatrist on the Sports Medicine Team.

Sports Psychiatry: An Update and the Emerging Role of the Sports Psychiatrist on the Sports Medicine Team.

Differences in GPS variables according to playing formations and playing positions in U19 male soccer players

ABSTRACT The aims of this study were 1) to investigate Global Positioning System (GPS)-based match physical performance according to players’ playing position in three different playing formations (4-4-2, 3-5-2, 4-3-3) and 2) to analyse the differences in match performance between 1st and 2nd half. Twenty-three U19 elite male soccer players (age: 18 ± 1 year, height: 1.80 ± 0.04 m, body mass: 70.65 ± 6.02 kg), categorized as Central Back (CB, n = 5), Full Back (FB, n = 4), Central Midfielders (CM, n = 4), Wingers (W, n = 3), Strikers (S, n = 7), were monitored using 10 Hz GPS during 31 competitive matches. The results showed that FB and W always had the highest very high-speed running distance and number of sprints in all playing formations. Significant decrease in all GPS variables was observed in the 2nd half of the match for all playing positions. Strength coaches should adopt specific training regimes in accordance with players’ playing position.

Examining How Elite S&amp;C Coaches Develop Coaching Practice Using Reflection Stimulated by Video Vignettes

The purpose of this study was to identify narrative types that illuminate how strength and conditioning (S&amp;C) coaches used video vignettes in a guided reflection process to support the development of effective coaching practices. At the beginning of each week, over a 4-week period, 11 elite S&amp;C coaches were sent a short video vignette clip of an S&amp;C coach’s practice. They subsequently engaged in daily reflections in which they were guided to explore how the topic of the vignette aligned (or not) with their coaching practice. After the intervention, each S&amp;C coach was interviewed regarding their process of learning from the vignette and from their reflections. Using a holistic narrative analysis of form and structure, the results exemplified three narrative types: performance, achievement, and helper. The S&amp;C coaches whose reflections fitted the performance narrative type focused on their own practice, with limited consideration of the athletes’ perspective or the vignette. The S&amp;C coaches whose reflections fitted the achievement narrative type strove to accomplish goals with their athletes and were selective in considering the vignette. The S&amp;C coaches whose reflections fit the helper narrative type found that the vignette helped them consider an athlete-centered coaching approach focusing on the athletes’ well-being, as well as athletic abilities. Thus, S&amp;C coach developers should utilize a guided reflection process that focuses on encouraging a coaching approach based on the helper narrative type.

How did three consecutive matches with extra time affect physical performance? A case study of the 2018 football Men's World Cup.

The purpose of this study was to ascertain the effect of playing three consecutive matches with extra time (ET) on the physical performance of selected Croatian players in their subsequent match, the final of the 2018 Men’s World Cup in Russia. The case study consisted of 4 players on the Croatian national team (16 observations) who had played in all three matches up to 120 min. The consecutive full time matches (90 minutes) and extra time (30 minutes) were compared. The analysis was conducted using data collected by an advanced motion analysis system known as STATS and from interviews with the strength and conditioning coach of the Croatian national team. The recorded variables used were: total distance covered [m], distances covered [m] at intensity ranges of 20–25 km/h and above 25 km/h, and number of sprints performed. All the studied parameters systematically increased in each match up to 90 minutes of play, reached their maximum values in the semi-final and then decreased in the final match. Compared to the first extra time period, in the third extra time period the players covered twice as much distance with an intensity of 20–25 km/h and above 25 km/h, and recorded twice as many sprints. This investigation shows that players in central positions on the pitch are able to maintain or even increase high and very high intensity activity in three consecutive matches with extra time. These data complement the developing body of literature relating to the influence of accumulation of match play with extra time periods on high level players.

Positive Relationships Between Golf Performance Variables and Upper Body Power Capabilities.

Sorbie GG, Glen J, and Richardson AK Positive relationships between golf performance variables and upper body power capabilities. J Strength Cond Res 35(12S): S97-S102, 2021-The importance of lower body and trunk strength and power, as well as upper body strength in golf is well documented; however, the relationship between upper body power and golf performance has yet to be determined. Therefore, the purpose of the study was to investigate the relationships between golf performance and upper body power. Thirteen golfers (mean ± SD: age: 30 ± 7 years and handicap: 6.1 ± 4.9) participated in the study. Club head velocity (CHV) and ball velocity were measured during the golf test. To assess upper body power, subjects completed a ballistic bench press and upper body Wingate test. Pearson product-moment correlations were used to assess the relationships between golf performance and upper body power. The results demonstrated that there were strong relationships between ballistic bench press and CHV and ball velocity when using the driver (r > 0.6-0.7), and moderate-to-strong relationships (r > 0.4-0.6) when using the 7-iron. Strong relationships were found between the upper body Wingate test and CHV and ball velocity (r > 0.5-0.8) when using the driver and 7-iron. As a result of the findings, strength and conditioning coaches may use both the ballistic bench press test and the Wingate test as a primary assessment to measure the effectiveness of upper body training interventions with the aim of improving golf performance. Although, when performing the golf swings at higher velocities (i.e., with the driver), the ballistic bench press may be more beneficial.

Concussions in Female Athletes: Practical Applications for the Strength and Conditioning Expert

ABSTRACT With the significant increase in concussion research and focus in the media, it is important for strength and conditioning coaches and medical experts to be clear on sex differences between how female and male concussed athletes may experience a concussion. To that end, this article offers a review of this current research, along with practical applications of the research for coaches and clinicians who work with female athletes. How should we be working with concussed female athletes specifically to assure their optimal recovery and future brain health?

Nontraumatic Exertional Fatalities in Football Players, Part 2: Excess in Conditioning Kills.

Background:The incidence of nontraumatic fatalities in high school (HS) and National Collegiate Athletic Association (NCAA) football players has continued at a constant rate since the 1960s.Purpose:To describe the causes of nontraumatic fatalities in HS and NCAA football players and provide prevention strategies.Study Design:Descriptive epidemiology study.Methods:We reviewed 187 fatalities in HS and NCAA nontraumatic football players catalogued by the National Registry of Catastrophic Sports Injuries during a 20-year period between July 1998 and June 2018.Results:The majority (n = 162; 86.6%) of fatalities occurred during a practice or conditioning session. Most fatalities, when timing was known, (n = 126; 70.6%) occurred outside of the regular playing season, with the highest incidence in the August preseason (n = 64; 34.2%). All documented conditioning sessions were supervised by a coach (n = 92) or strength and conditioning coach (n = 40). The exercise regimen at the time of the fatality involved high-intensity aerobic training in 94.7%. Punishment was identified as the intent in 36 fatalities. The average body mass index of the athletes was 32.6 kg/m2. For athletes who died due to exertional heat stroke, the average body mass index was 36.4 kg/m2, and 97.1% were linemen.Conclusion:Most nontraumatic fatalities in HS and NCAA football players occurred during coach-supervised conditioning sessions. The primary cause of exertion-related fatalities was high-intensity aerobic workouts that might have been intended as punishment and/or excess repetitions. Exertion-related fatalities are potentially preventable by applying standards in workout design, holding coaches accountable, and ensuring compliance with the athlete’s health and current welfare policies.