This manuscript describes three-dimensional force data collected during postural shifts performed by individuals simulating rock-climbing skills. Starting from a quadrupedal vertical posture, 6 expert climbers had to release their right-hand holds and maintain the tripedal posture for a few seconds. The vertical and contact forces (lateral and anteroposterior forces) applied on the holds were analyzed in two positions: an “imposed” position (the trunk far from the supporting wall) and an “optimized” position (the trunk close to the wall and lower contact forces at the holds). The tripedal postures performed in the two positions were achieved by the same pattern of vertical and contact forces exerted by the limbs on the holds. In the optimized position, the transfer of the forces was less extensive than in the imposed position, so that the forces were exerted primarily on the ipsilateral hold. Moreover, a link between the contact force values and the couple due to body weight with respect to the feet was shown.
Franck Quaine, Luc Martin, and Jean-Pierre Blanchi
Nicolas Termoz, Luc Martin, and François Prince
The aim of this study was to assess postural response efficiency to a self-initiated perturbation using an original method based on the inverted pendulum model. Eight young subjects were asked to perform bilateral arm raising and lowering at 3 different speeds while standing on a force plate. The time necessary to recover a steady state following the movement was computed by analyzing the time evolution of the coefficient of determination between the center of pressure and center of mass difference variable (COP-COM) and the horizontal acceleration of the COM. Results show a spatial reorganization (hip strategy) of the segments following the perturbation and a strong influence of the linear relationship to the arm velocity. However, the conditions of arm velocity did not have any effect on the time response of the postural control, suggesting that this parameter would be an invariant characteristic of the movement. These results support the existence of an internal representation of the inertial constraints related to the movement execution.
Jordan D. Herbison, Luc J. Martin, and Mustafa Sarkar
Adversity is viewed as both an inevitable and an important experience for elite athletes. The purpose of this study was to explore elite athletes’ perceptions of the experiences and characteristics that helped them overcome a shared sport-specific adversity. Semistructured interviews were conducted with 12 professional athletes (M age = 27.25, SD = 3.28 yr) who had progressed to careers in the National Hockey League (NHL) despite not being selected in the annual amateur entry draft. Participants discussed their long-term objectives of playing in the NHL, previous experiences with adversity, certain psychological characteristics that facilitated their progression (e.g., competitiveness, passion, confidence), and the significance of social support as key factors that helped them overcome the initial and subsequent adversities associated with being unselected during the amateur entry draft. Practical implications and proposed avenues for future research are discussed in the context of the study’s limitations.
Alyson J. Crozier, Luc J. Martin, and Kevin S. Spink
The extent to which humans consider themselves part of a group versus a collection of individuals is termed groupness. Despite a rich history in other domains, research examining the construct in physical activity settings is only beginning to emerge. Indeed, seminal research from other domains and recent efforts in physical activity highlight the importance of groupness perceptions for a range of outcomes. This paper provides an overview of the current groupness conceptualization in physical activity, presents research conducted in exercise and sport contexts, and, most important, provides a roadmap highlighting future research avenues. Proposed lines of enquiry relevant to physical activity include the development of a context-specific conceptualization, advances in methodologies to facilitate measurement and analysis, and the importance of contextualizing groupness research within physical activity settings.
Sarah Lawrason, Jennifer Turnnidge, Luc J. Martin, and Jean Côté
To maximize the effectiveness of coach development, educational programs should target coaches’ interpersonal behaviors, be informed by behavior-change techniques, and incorporate comprehensive evaluation procedures. Thus, informed by the full-range leadership model (see Bass and Riggio in 2006) and the Behaviour Change Wheel (see Michie et al. in 2011), Turnnidge and Côté in 2017 developed the Transformational Coaching Workshop (TCW). The purpose of this study was to evaluate the TCW’s effectiveness through observation before and after coaches’ workshop participation. Participants included 8 male head coaches of youth soccer teams. Systematic observation and coding using the Coach Leadership Assessment System were employed pre- and postworkshop to examine coaches’ leadership behaviors. Coaches made improvements in the types of leadership behaviors used and how they were conveyed. This study demonstrates that systematic observation can be implemented to explore real-world changes in behaviors. Future research should examine the impact of the TCW on athlete outcomes.
Jennifer T. Coletti, Veronica Allan, and Luc J. Martin
A child’s first contact with media and culture typically comes from books they are exposed to in the home and at school. The narratives presented contribute to the early reinforcement of gender roles and norms and can greatly influence the way that young girls perceive and experience sport. The purpose of this study was to explore the narratives within sport-based books geared toward a young female audience to determine the extent to which they promote the engagement of girls in sport. A pragmatic literature search was conducted to obtain books that met our inclusion criteria. Books (n = 28) were analyzed based on the age of their intended audience (aged 3–5, 6–8, and 9–12 years) using thematic narrative analysis. Although the authors promoted the engagement of girls in sport, underlying gender stereotypes were nevertheless salient. Across the books, themes involved the emphasis of “feminine” sports as a context for diversity and learning, the need to understand development as a process, the importance of relationships, and implications pertaining to perceptions of capability as female athletes. Most importantly, the application of a critical feminist lens enabled us to identify an underlying theme—the reinforcement of gender stereotypes—that permeated the storylines and served to undermine the potential adaptive messaging intended by authors. These findings suggest the need for greater attention toward the complexity of female sport and a cultural shift in thinking toward gender equity rather than simply increasing sport access for female participants.
Jennifer R. Tomasone, Natascha N. Wesch, Kathleen A. Martin Ginis, and Luc Noreau
Individuals with spinal cord injury (SCI) tend to report poorer quality of life (QOL) than people without a physical disability. Leisure-time physical activity (LTPA) has been shown to improve the QOL of people with and without disabilities and chronic conditions. The purpose of this systematic review was to examine the LTPA-QOL relationship among people with SCI by focusing on both objective and subjective QOL for both global QOL and domain-specifc (physical, psychological, social) QOL. Results suggest that LTPA is significantly associated with increases in both objective and subjective QOL in global QOL and all three QOL domains, with relatively few studies demonstrating a negative or nonsignificant relationship. Recommendations for future QOL research and interventions are discussed.
Jordan D. Herbison, Terry W. Cowan, Luc J. Martin, Zach Root, and Mark W. Bruner
This study sought to examine coaches’ perceptions of social identity among their athletes and explore the ways that they may attempt to influence its development. Semistructured interviews were conducted with 12 head coaches (Mage = 49.25 years; SD = 6.5 years; Mexperience = 15.75 years; SD = 7.66 years; nfemale = 1) of male (n = 8) and female (n = 4) competitive youth ice hockey teams. Three main themes were identified through our analysis. First, the coaches’ perceptions of athletes’ social identities were described through examples of peer connection and similarity (i.e., in-group ties), athletes’ experience of positive affect (i.e., in-group affect), and athletes demonstrating the meaning and value that they attribute to team membership (i.e., cognitive centrality). Second, the coaches discussed a variety of ways that they sought to develop and reinforce a shared social identity within their teams. These behaviors aligned with principles advanced within the social identity leadership literature—namely, the coaches acted as in-group prototypes, in-group champions, entrepreneurs of identity, and embedders of identity. Finally, the coaches identified parents and cliques as key social agents with the ability to undermine social identity development. The findings are discussed in relation to both their theoretical and practical implications.
Milou Beelen, Louise M. Burke, Martin J. Gibala, and Luc J.C. van Loon
During postexercise recovery, optimal nutritional intake is important to replenish endogenous substrate stores and to facilitate muscle-damage repair and reconditioning. After exhaustive endurance-type exercise, muscle glycogen repletion forms the most important factor determining the time needed to recover. Postexercise carbohydrate (CHO) ingestion has been well established as the most important determinant of muscle glycogen synthesis. Coingestion of protein and/or amino acids does not seem to further increase muscle glycogensynthesis rates when CHO intake exceeds 1.2 g · kg−1 · hr−1. However, from a practical point of view it is not always feasible to ingest such large amounts of CHO. The combined ingestion of a small amount of protein (0.2–0.4 g · (0.2−0.4 g · kg−1 · hr−1) with less CHO (0.8 g · kg−1 · hr−1) stimulates endogenous insulin release and results in similar muscle glycogen-repletion rates as the ingestion of 1.2 g · kg−1 · hr−1 CHO. Furthermore, postexercise protein and/or amino acid administration is warranted to stimulate muscle protein synthesis, inhibit protein breakdown, and allow net muscle protein accretion. The consumption of ~20 g intact protein, or an equivalent of ~9 g essential amino acids, has been reported to maximize muscle protein-synthesis rates during the first hours of postexercise recovery. Ingestion of such small amounts of dietary protein 5 or 6 times daily might support maximal muscle protein-synthesis rates throughout the day. Consuming CHO and protein during the early phases of recovery has been shown to positively affect subsequent exercise performance and could be of specific benefit for athletes involved in multiple training or competition sessions on the same or consecutive days.
Luc J. Martin, Jessi Wilson, M. Blair Evans, and Kevin S. Spink
Although cliques are often referenced in sporting circles, they have received little attention in the group dynamics literature. This is surprising given their potential influence on group-related processes that could ultimately influence team functioning (e.g., Carron & Eys, 2012). The present study examined competitive athletes’ perceptions of cliques using semistructured interviews with 18 (nine female, nine male) intercollegiate athletes (Mage = 20.9, SD = 1.6) from nine sport teams. Athletes described the formation of cliques as an inevitable and variable process that was influenced by a number of antecedents (e.g., age/tenure, proximity, similarity) and ultimately shaped individual and group outcomes such as isolation, performance, and sport adherence. Further, athletes described positive consequences that emerged when existing cliques exhibited more inclusive behaviors and advanced some areas of focus for the management of cliques within sport teams. Results are discussed from both theoretical and practical perspectives.