Based on these insights, from an ecological dynamics perspective, Araújo and Davids (8) reconceptualized skill acquisition as “the emergence of an adaptive, functional relationship between an organism and its environment.” Skillful movement behaviors, therefore, when viewed through an ecological lens, could be conceived of as the emergence (with practice and experience) of coordinated movement solutions by an athlete, which are essentially dynamical products of continuous performer-environment interactions. This ecological view moves skill acquisition away from acquiring content knowledge about the environment towards skill in adapting to the dynamics of the environment (and its problems) and begins to position the expression of skill closely to that of effective problem-solving through one's movement.

Though many associate the work of Nikolai Bernstein with ideas of coordination in movement systems (i.e., Bernstein's degrees of freedom problem), it is clear Bernstein felt that a more appropriate scale of analysis for movement should extend beyond the motor system, looking deeper into relations and interactions between systems—connecting movement problems with the solutions coordinated to solve them. According to Bernstein (24), “dexterity is the ability to find a motor solution for any external situation, that is, to adequately solve any emerging motor problem.” He added, “dexterity is not confined within the movements or actions themselves but is revealed in how these movements behave in their interaction with the environment, with its unexpectedness and surprises”. The key to skill adaptation is the emergence of movement solutions, softly assembled (15) to functionally fit the unique and unfolding problem.

The aforementioned work (2, 13, 22, 24) helps shape the systems narrative around the tight coupling between perception and action and the athlete and their environment (i.e., signifying the fit between problem and solution). Viewed in this way, animals and the surrounding environment are inseparable and incapable of existing without one another (13), as they have a mutual and reciprocal relationship with each other; this idea underlines the relations between athletes and their movement problem-solving processes within competitive performance. Athletes cannot organize a solution without first being presented with a problem. This notion implies that scientists should not analyze or attempt to understand movement solutions in isolation without paying equal respect to the contextual problem the behavior is organized to satisfy.

If the essence of movement behavior in sport is in the problem-solving activities which are dynamically and continuously emerging from the athlete-environment relationship, then the questions arise: How does an athlete coordinate the proper relations of their movement system with the environment? Furthermore, what individual subsystems, and associated processes, may underpin this movement problem-solving process?

The above contention captures the importance of individuals—in our case, athletes—being both perceivers and behavers, where perception and action processes can be thought of as tightly coupled because perception is required to adequately regulate behavioral actions and acting allows for the pick-up of additional information about the problems in the world, which will further serve to guide subsequent actions in a tightly coupled fashion (13, 25). Within this, the concept of behavioral dynamics (26), which integrates an information-based approach to perception with a dynamical systems approach to the organization of action (27), may enable further understanding as to how detected information in person-environment relations channels the movements which emerge in the pursuit of goal-directed actions. At a certain level, the problem of the organization of behavior is synonymous with perception and action processes feeding into one another as movement becomes coupled to information (27).

The current state of affairs between the unfolding problem-solution dynamics can be assessed through perception of information (see Figure 1) which is a dynamic process involving the entire human movement system of the athlete (16, 28). With increased exposure to practice and performance, athletes may become more sensitive to (i.e., perceptually attuned to) which informational variables to attend to and when to attend to them. Practice and experience should educate their attention to these variables, allowing athletes to more functionally regulate their movement actions across various situations (8, 29). Through this process of attunement, the athlete can create constant, purposeful contact with a complex, ever-changing environment, through the perception of information and a range of decisions that they actively undertake, regulating their interactions to solve emergent problems.

It should also be acknowledged that emerging movement solutions in sport are always goal-directed. Meaning, movement solutions are organized for the functional purpose of achieving a specific outcome in the competitive performance environment. Therefore, performance behaviors need to be interpreted with reference to that functional purpose (26, 30). Accounts of movement behavior in sport must capture the nature of the athlete's intended goal(s), seeking to characterize how movement solutions are coordinated in relation to the problems and challenges of the environment. This could point to a further understanding of how cognitive processes may be situated in the emergence of movement behavior (6, 31). Though there have been questions raised over a lack of explanation about how cognition may function in ecological theories (3, 5), perception could be considered a fundamental type of cognition (13). Additionally, cognition may also be considered the coordination of intended interactions with the performance environment (32). Finally, Reed (33) called cognition “a set of capacities by which observers gain knowledge of their environment”. Cognition, provided by perception, could support an athlete's knowledge of the environment, allowing them to be aware of events, objects, and others that exist (attention), have existed (memories), may come to exist (anticipation), and ought to exist (planning, prediction). According to Reed (33), actions, perception, and cognition are “knowledge-yielding processes”. Perception is a cognitive function of the most essential kind because it yields knowledge of affordances available in a performance environment.

Therefore, an athlete's cognitions may scaffold the information they perceive while also influencing how they ultimately coordinate their actions (20, 34). In an ecological approach, cognition is proposed to operate in an embodied and embedded fashion (6). Here, cognitive processes combine with other subsystems to form a comprehensive, integrated system, supporting the use of knowledge of a performance environment. This unfolds potentially through a resonance mechanism in the central nervous system where an athlete becomes tuned to available information (28). For example, if a basketball player perceptually picks up a teammate entering the paint near the basket, the ball handler needs to be “tuned in” to the available information in the performance environment for an affordance (e.g., a passing lane opening up to throw the ball to a moving teammate who is separating from a defending opponent) that invites a quick pass from behind the three-point line. Following Gibson's ideas, when the teammate is detected near the opponent's basket, the point guard's perceptual system resonates with that information for an affordance (13, 28). Further, this has the potential to give rise to a mover displaying skilled intentionality by being open and responsive within a rich landscape of opportunities (30, 35), where the affordance landscape will then channel the specific way the ball handler acts (e.g., when, where, and how to coordinate motor system degrees of freedom to complete an accurate and timely pass to the teammate).

Though we may be able to neatly define each of the various processes (see Figure 1), because of their tightly intertwined nature, perception, cognition, and action would not be viewed as separate processes, functioning in isolation, under an ecological dynamics framework. Instead, perception, cognition, and action could be considered inextricably linked as the constituent, interacting elements of one integrated movement solution (IMS)—in slightly differing, yet highly related, accounts of a holistic, movement problem-solving process (MPSP).

Context requires an individual to adapt to changing external demands (i.e., constraints where a movement emerges) and internal states (i.e., within the individual). Newell (14) proposed that coordination could be defined as the function constraining the free variables of the human movement system (i.e., degrees of freedom) into a behavioral unit—capturing how the component parts and processes of a system come into relation with one another. What an athlete is attempting to coordinate is not just a motor response, but a functional behavioral unit, organized to fit the dynamical needs of their world. We propose that the IMS is a functional behavioral unit that harnesses degrees of freedom within and between the dimensional levels across the system (of perception, cognition, and action) and points us to how those processes may be integrated to underpin this MPSP (see Figure 2).

Ultimately, this problem-solver paradigm extends Bernstein's degrees of freedom problem beyond the motor system, looking deeper into the relations and interactions between subsystems and processes. Just as there are numerous ways that the degenerate motor system can be coordinated and controlled (e.g., joint positions, timing and sequencing of patterns), there will be degrees of freedom perceptually and cognitively as well. For example, perception can unfold through a variety of interconnected sensory subsystems within the body (e.g., visual, auditory, haptic), all combining to varying degrees to provide the athlete with functional contact with the world (36), as they attempt to detect the most relevant information regarding opportunities present for authentically solving a peculiar problem. Closely connected to perception, the athlete's cognitive degrees of freedom can also be coordinated in various ways, led by their constantly changing intentional aims, the diverse thoughts they may have, their unfolding movement strategies, and the wide range of decisions that they can make as a mover interacting with the dynamic problems within the world.

Processes of perception, cognition, and action are interdependent with one another, interacting with circular causality, underpinning movement systems as complex, dynamical systems (20). Through these interconnections, dynamics in the organization of the self-regulation process at a local level (such as the specifying information a player is picking up, how and when the athlete is picking up the information, etc.), could perpetually feed into the dynamics of other processes (e.g., intentions underpinning performance, movement strategy employed, how actions are being regulated), as well as global, system-wide movement behavior. Skill adaptation is enhanced because constituent parts and related processes of a human movement system can fit together and operate in many different ways or configurations (i.e., displaying system degeneracy; 37).

The IMS, or the MPSP, can be investigated at and across multiple timescales of analysis, ranging from the local interactions of movement performance (i.e., brief moments in time or numerous sequences unfolding successively in a singular play) to more global patterns of evolved movement behavior indicative of skill acquisition and learning over significant periods (i.e., days, weeks, months, or years). In sports, movement problem-solving may not be adequately captured through the expression of a discrete event, isolated entity, or simplified response, as it is occasionally reduced to within traditional motor control or learning research (e.g., button-pressing, stimuli-response aiming tasks). Within the typical performance constraints of most sports, we may not always be able to accurately determine where one movement solution, or even one movement problem, ends and another one begins for the athlete. Due to context-conditioned coupling variability (38), one movement problem does not typically exist in isolation because it is integrated with other deeply interrelated, interconnected challenges and problems. Thus, the MPSP could be best conceptualized as a constantly unfolding process where the system's degrees of freedom are continuously (re)organized, and circular causality is displayed throughout the relations between system components (see Figure 2, which shows arrows pointing both ways between the degrees of freedom of each of the human movement system's dimensional levels to depict the potential relationships emerging during movement behavior organization). To illustrate, imagine a soccer player dribbling a ball, concurrently scanning the landscape of the performance environment for opportunities to pass to a teammate, execute a shot on goal, or continue to move throughout space, navigating around defenders and teammates in an evasive manner. Moment-by-moment, various local movement problems, challenges, and decisions will continue to emerge and unfold dynamically, which the player must attempt to deal with in their own unique and authentic fashion. These problem-solution dynamics could be studied as such on any number of micro or macro levels.

Recent research (see 4, 17, 20, 21, 39) has extended our understanding of these theoretical constructs in ecological dynamics, elaborating how these ideas can be practically utilized in skill enhancement programs. In particular, there has been a rhetoric threaded throughout this work on the need for athletes to seek functional movement solutions and adaptive behaviors. For example, when presenting their idea of wayfinding, Woods et al. (39) highlighted how movers purposefully and skillfully regulate through their environment underpinned by this deeply entangled relationship of perception, cognition, and action; encompassing real-time, actively engaged problem-solving.

Affordances have been positioned as a conceptual pillar for the study of movement behavior within sports (41). In particular, Fajen et al. present the key features of affordances that allow them to be especially helpful in investigations. They highlighted how affordances (a) are real; (b) are animal-specific; (c) capture the reciprocity and coupling of perception-action; (d) allow for prospective control; (e) are meaningful; and (f) are dynamic. Due to their ability to provide the athlete with information about their ongoing relationship with the world, informing individuals how they could move to achieve their behavioral goals (i.e., solving problems in the performance environment), affordances could be viewed as functional semantics for sports (41).

Affordances go beyond being just mere possibilities or opportunities for acting in a certain way within a performance environment as they could also be viewed as invitations or solicitations (34); it is almost as if the environment is calling for a specific way of acting, connecting the performer-environment through the constant exchange of information. At any moment, there will be a variety of simultaneous and successive affordances which are available for detection, each inviting or soliciting a player to act, though they will differ in degree of attraction for various reasons. Thus, the athlete will still need to decide which affordance to select and act upon after perceiving them out of a rich landscape of inviting opportunities. Ultimately, agency is needed in accepting affordances as the athlete will still be the source of their own activity and the vehicle of the emerging movement behavior.

In recent work by Araújo and colleagues (6), more elaborate hypotheses were offered to depict how cognitive processes, particularly those related to decision-making, may exist as constituent elements of the IMS that emerge as one perceives, selects, and acts upon the affordances in the world. In their work (see 31, 42), decision-making is closely linked to problem-solving. Because the world is its best model and behavior is always dependent on circumstances, both cognition and decisions will also be emergent processes, like perception and action (6, 20). Generally speaking, perception is of affordances, and actions, which are an expression of cognition, are the realization of the selected affordances (6).

As noted earlier, the potential affordances connecting the athlete-environment system are specified by information provided by surrounding energy arrays, residing in the structure of the sporting environment. Thus, the movement solutions that emerge will depend on an athlete's sensitive detection of and close coupling to these relevant information sources. Though additional research is certainly needed, some research has begun to explore the nature, role, and use of information in the regulation of movement within some sport contexts (e.g., 16, 41), such as team sports like rugby codes (42–44) or basketball (45), as well as various combat sports (46, 47).

Taking this research into account, it would seem that information pertaining to interpersonal distance (46, 47), particularly within dyadic relationships (e.g., between opponents or teammates), could be an informational variable specifying affordances, channeling the movement problem-solving processes of athletes. As Gibson (13) stated, “Behavior affords behavior,” meaning it is how two (or more) individuals interact in the competitive performance environment that gives rise to the possibilities for athlete performance behaviors to emerge. Though the informational variable of interpersonal distance may be transferable across some sports, its critical values (i.e., how this information will be utilized in the regulation of movement) will be sport-, context-, and individual-specific. Additionally, it is likely that information about interpersonal distance alone may not be enough to explain the movement behavior that emerges in context (43). In other words, athletes may also be attuning to other informational variables to specify the affordances present when faced with solving complex movement problems. These variables could relate to relative angles or velocity values between competitors (42, 44), variations in gaps between opponents and teammates (17, 20), postural characteristics of opponents (17, 45), or any combination of these variables (17, 20, 44).

In contemplating where the fields of movement, learning, and pedagogy could advance to better understand how movement solutions emerge in different performance contexts of sport, it is worth highlighting some additional areas for future research to consider. First, there is an apparent paucity of research that studies sport movement skills in situ. Though it is obviously a daunting and possibly intrusive task to adequately unpack movement behavior in this fashion (i.e., in competitive performance contexts), we must recognize the need and importance of this endeavor. In studying movement behavior: context is everything! The problems which confront athletes, as well as the coordination of IMS which emerge, will be highly specific to the performance context which they inhabit (48).

Second, it has been well over a decade since Fajen and colleagues proclaimed the potential for the use of affordances in studying the problem-solution dynamics in sports (41). Yet, there is still limited research that has attempted to fully explain the presence of affordances across a variety of sporting contexts, while addressing their explanatory role in how they may influence the emergence of movement behavior. There is a need for research that can further unpack the MPSP in terms of the intertwined processes of perception, cognition, and action in relation to the opportunities detected, selected, and acted upon out of the rich landscape of affordances (6).

The adoption of this problem-solver paradigm (underpinned by ecological dynamics) is useful for enhancing our understanding of the problem-solution dynamics in sports that are beyond invasion-based team games (e.g., soccer, rugby codes, basketball, American football) or dyadic relationships in combat sports, as we explored earlier. Alive movement problems are everywhere and within all sporting environments, and they require athletes to organize an adaptable IMS. Researchers should continue to investigate the potential informational variables that performers are detecting, and how they are organizing their movement behaviors in relation to the affordances they perceive, both within and across diverse sporting contexts. Some research has been conducted in this area (see 49–53 for examples), but it needs expansion to further impact practice.

Additionally, many of the investigations into information, affordances, and movement behavior in sport have been conducted with athletes who perform at relatively low levels of skill. To understand the problem-solving processes of athletes across the timescales of learning, we should study how those who display dexterity (i.e., the ability to solve any emerging movement problem) interact with the varied and complex problems of their world, through their use of specifying information, differently from their less skilled counterparts. There is a need to understand more about the behavioral organization of the MPSP of highly skilled, elite athletes and how the degrees of freedom across the dimensional levels of their movement systems (i.e., perception, cognition, and action) are coordinated.

Supported by ideas underpinned by theory and empirical evidence, coaches and support practitioners can design practice environments to facilitate enhanced movement problem-solving for the athletes they partner with in training. Information sources that athletes become attuned to, as well as their common ways of behaving, are influenced by the situations and conditions that they routinely face in practice environments. Thus, coaches should aim to set alive movement problems (17) to present to the athlete in practice and training. These types of problems are those where the strategies and outcomes are unpredictable (e.g., the inclusion of moving opposition and teammates in team sports situations, a resisting opponent in combat sports). Here, athletes will be required to perceive a vast array of informational sources specifying a rich landscape of affordances to potentially interact with, actively make decisions around, and coordinate functional actions, often in more variable fashions, in relation to (6, 20). As affordances emerge and decay dynamically within these alive movement problems, it could allow for the search, discovery, and exploitation of a wider range of authentic IMS to positively transfer into perceiving and accepting affordances in the competitive sports arena (20). Yet, many training or practice settings often contain highly sterile and predictable tasks which expect an athlete to simply repeat an idealized motor response with little emergent problem-solving or decision-making needed (i.e., the equivalent of less alive movement problems consisting of dead technical patterns). To assist coaching practitioners in designing more alive movement problems, it may be useful to ask a number of pertinent questions regarding the inclusion of key conceptual principles within activities being presented to athletes in any practice environment (see Table 1).

Research questions may still exist on: (i) how to ensure representativeness of practice designs (i.e., for the movement problems presented); (ii) how to appropriately set a movement problem that adequately stretches a specific athlete's movement behavioral dynamics to a place of continued evolution; (iii) how to determine if a movement solution is ‘correct’; and (iv) how to effectively guide a performer's perception, cognition, and action processes to become functionally fit to match the problems in their world. However, one thing is clear: dexterity in sport does not equate to repeating a particular movement pattern more consistently or employing a given strategy more automatically (2). Instead, dexterity centers on the athlete being able to solve any emerging movement problem (20, 21, 24), across situations (e.g., facing opponents with different capabilities or styles of movement skill, operating under various spatial and temporal demands), and conditions (e.g., in various weather conditions, facing pressure, under levels of fatigue), allowing them to become one with a dynamic, complex problem through interactive information transactions.

For highly interactive problem-solving to occur, the complexion and disposition of most movement problems in practice should vary frequently from repetition to repetition. This type of learning opportunity could allow athletes to gain experience in functionally self-regulating the processes involved with their movement problem-solving—thus aligning with Bernstein's (2) original thoughts on repetition without repetition—with the goal of the mover becoming skillfully attuned, intentional, and adaptable. Woods and colleagues (39) describe this process of learning in practice, emphasizing that coaches should “challenge the learner to experiment through performing, adapting and creating movement solutions that best answer his/her individual needs within a given context.” Ultimately, by navigating through the solving of a diverse range of alive problems, athletes will learn how to coordinate their perception, cognition, and action by continuously (re)organizing the degrees of freedom of the human movement system and adjusting the relations between these integrated processes to fit together in various ways. Through this exploration and search process, athletes strengthen their connection to the unique problems of the environment, tightly coupling their movement in close relation to the affordances offered within those problems.

When athletes solve movement problems in this highly emergent fashion, practitioners can expect the expression of a number of signature movement properties^[1] (e.g., variability, abundance, creativity, authenticity), sometimes viewed as undesirable in more traditional approaches. In an ecological dynamics framework, these respective movement properties are not to be frowned upon or avoided; instead, they should actually be pursued as they are recognized as key performance indicators of skillful and dexterous movers (19). Recognizing that all athletes have their own individual constraints and movement histories, practitioners may be well served to avoid imposing their own idealized ways of perceiving, deciding, and acting upon the athlete (54). Instead, skill optimization may stem from attunement, abundance, authenticity, and adaptability. Being that no two problems in sport are ever truly the same, and sporting environments can present a diverse range of problems to athletes, it would stand to reason that the athlete having a plethora of potential movement strategies and options that can be flexibly adjusted to meet the needs of a peculiar problem becomes a worthy aspiration for coaches to pursue. Thus, learning environments should also reflect this goal.

To assist in the emergence of highly functional and authentic movement solutions, coaching practitioners, acting as learning environment designers, should aim to guide and facilitate, employing communication methods (i.e., instructions and feedback) that strive to educate the attention (pursuing perceptual attunement) and intentions of the athlete (29). The goal of this type of direct learning approach would be to encourage the perceptual search for relevant information sources and the affordances they specify, while allowing the athlete to explore the breadth of their entire movement toolbox. As the athlete gains experience and exposure, they will become more attuned to specifying information sources, being intentional about the goals to be achieved in particular situations, and being adaptable in how their movement is calibrated and coupled to the relevant information within the problems of the sport environment.