scholarly journals Focus of attention and online demonstration effects on temporal error and muscle activation

2020 ◽  
Vol 22 ◽  
Author(s):  
Tércio Apolinário-Souza ◽  
Herbert Ugrinowitsch ◽  
Carlos Eduardo Campos ◽  
Lucas Túlio de Lacerda ◽  
Frank Douglas Tourino ◽  
...  
Keyword(s):  
Outcome Measures ◽  
Muscle Activation ◽  
Focus Of Attention ◽  
Emg Activity ◽  
Muscle Action ◽  
Experimental Conditions ◽  
Leg Extension ◽  
External Focus ◽  
Internal Focus ◽  
Muscular Activation

Abstract The purpose of the present study was to examine whether there would be performance differences between external and internal focus of attention conditions and an online demonstration condition, and if these differences would be observed at a neuromuscular level through EMG analysis, in addition to traditional outcome measures. We hypothesized that under the demonstration condition participants would perform better than under external and internal focus conditions. We also hypothesized that demonstration condition would show smaller EMG activity than external and internal focus conditions. Furthermore, we hope to replicate the benefits of external focus in relation to internal focus, both in outcome and product measures. Six male participants performed a bilateral leg extension under internal focus of attention, external focus of attention and online demonstration conditions. Muscular contractions goal times were set for concentric muscle action (4 seconds) and eccentric muscle action (2 seconds). An electrogoniometer was used to record muscular activation (production measures), and temporal error was used to observe performance (outcome measures). Results showed that online demonstration condition obtained better performance than external focus condition and a reduced muscular activation. However, differences between internal focus and the other experimental conditions were not found. These findings advance in the understanding mechanisms underpining the focus of attention, such as proposed by Constrained Action Hypothesis.

scholarly journals Thinking Outside the Block: External Focus of Attention Improves Reaction Times and Movement Preparation Times in Collegiate Track Sprinters

Sports ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 120 ◽  
Author(s):  
Attila Kovacs ◽  
Garrett Miles ◽  
Harsimran Baweja
Keyword(s):  
Muscle Activation ◽  
Vastus Lateralis ◽  
Reaction Times ◽  
Focus Of Attention ◽  
Track And Field ◽  
Movement Preparation ◽  
External Focus ◽  
Internal Focus ◽  
Coaching Methods ◽  
Gastrocnemius Muscles

While focusing attention on external cues (EF) has been shown to enhance performance track and field coaches tend to provide instructions that promote internal focus of attention (IF) during block starts. The aims of this study were to determine: (1) whether promoting EF versus IF would improve reaction time (RT) of sprinters, and (2) if changes occur at the level of central processes during movement preparation (premotor RT) or peripheral processes during movement execution (motor RT). Twelve collegiate track sprinters (age 20.8 ± 1.7) completed three testing sessions under EF, IF, and no focus instruction (NF) conditions. RT was recorded from the left and right blocks. Muscle activation time (EMG) was recorded from the vastus lateralis and gastrocnemius muscles. Mean rear foot RT was significantly shorter (p < 0.0001) under the EF (212.11 ms) compared with the IF (234.21 ms) and NF conditions (236.87 ms). Front foot RT was significantly shorter (p < 0.05) during EF (250.24 ms), compared to IF (266.98 ms) but not shorter than the NF (268.73 ms) condition. Mean premotor RT under the EF condition (157.75 ms) was significantly shorter (p < 0.001) compared with the IF (181.90 ms) and NF (173.60 ms) conditions. No differences were found in motor RT across conditions (p > 0.05). Adopting an EF improves RT during sprint starts. This improvement likely originates from a shortening in movement preparation time, as opposed to a faster excitation contraction coupling of the muscle fibers. These findings could potentially contribute to the development of new coaching methods aimed at improving the starting technique of athletes.

Differences in muscular activation and fatigue for intermittent and constant load

2005 ◽  
Vol 5 (1) ◽  
pp. 43-56
Author(s):  
Danuta Roman-Liu ◽  
Krzysztof Kȩdzior
Keyword(s):  
External Force ◽  
Upper Limb ◽  
Muscle Activation ◽  
Regression Line ◽  
Constant Load ◽  
Median Frequency ◽  
Experimental Conditions ◽  
Emg Signal ◽  
Limb Posture ◽  
Muscular Activation

The aim of this study was to compare the influence of constant or intermittent load on muscle activation and fatigue. The analysis and assessment of muscular activation and fatigue was based on surface EMG measurements from eight muscles (seven muscles of the right upper limb and trapezius muscle). Two EMG signal parameters were analyzed for each of the experimental conditions distinguished by the value of the external force and the character of the load – constant or intermittent. The amplitude related to its maximum (AMP) and the slope of the regression line between time and median frequency (SMF) were the EMG parameters that were analyzed. The results showed that constant load caused higher muscular fatigue than intermittent load despite the lower value of the external force and lower muscle activation. Results suggest that additional external force might influence muscle activation and fatigue more than upper limb posture. The results of the study support the thesis that all biomechanical factors which influence upper limb load and fatigue (upper limb posture, external force and time sequences) should be considered when work stands and work processes are designed. They also indicate that constant load should be especially avoided.

Verbal Cues and Attentional Focus: A Simulated Target-Shooting Experiment

2017 ◽  
Vol 5 (1) ◽  
pp. 148-159 ◽  
Author(s):  
Louisa D. Raisbeck ◽  
Jed A. Diekfuss
Keyword(s):  
Attentional Focus ◽  
Focus Of Attention ◽  
Verbal Cues ◽  
Task Load ◽  
External Focus ◽  
Gun Barrel ◽  
Internal Focus ◽  
And Performance ◽  
Nasa Task Load Index ◽  
Learning And Performance

Performance benefits exist for an external focus of attention compared with an internal focus of attention for performance and learning (Wulf, 2013). It is unknown, however, if varying the number of verbal cues affects learning and performance. Focus of attention and the number of verbal cues were manipulated during a simulated handgun-shooting task. For the internal focus conditions, participants were told to focus on their hand, arm, and wrist, whereas the external focus instructions were to focus on the gun, gun barrel, and gun stock. To manipulate the number of verbal cues, participants received instruction to focus on a single verbal cue or multiple verbal cues. Shooting performance was assessed at baseline, acquisition, and at two separate retention phases (immediate, delayed) that included transfer tests. Participants completed the NASA—Task Load Index to assess workload following all trials. Participants who received one verbal cue performed significantly better during immediate retention than those who received three verbal cues. Participants who used external focus of attention instructions had higher performance and reported less workload at delayed retention compared to those who used internal focus instructions. This research provides further support for the benefits of an external focus and highlights the importance of minimizing the number of verbal cues.

scholarly journals Do Children Benefit External Focus of Attention as Much as Adults? A Motor Learning Study

2017 ◽  
Vol 11 (7) ◽  
pp. 85 ◽  
Author(s):  
Somaye Roshandel ◽  
Hamidreza Taheri ◽  
Amir Moghadam
Keyword(s):  
Motor Skills ◽  
Retention Test ◽  
Attentional Focus ◽  
Focus Of Attention ◽  
Learning Study ◽  
Test Results ◽  
Future Studies ◽  
External Focus ◽  
Internal Focus ◽  
And Task

Recent evidence supports advantages of an external focus of attention on learning motor skills, however, there is a need to retest these finding for children and comparing them with adults. Thus, the purpose of current study was to determine the effect of different attentional focus on learning a motor skill in children and adults. Thirty children (8-12 year) and thirty adults (25-42 years) were randomly assigned to one of four groups: (1) Children external focus of attention (EFA), (2) Children- internal focus of attention (IFA), (3) Adults- External focus of attention (EFA), (4) Adults- internal focus of attention (IFA). Following initial instructions and task demonstration, participants performed 60 darts throwing in six blocks and 24 hours later performed 10 additional throws for retention test. Results revealed that children benefited from EFA and IFA instruction in the same manner, however, adults benefited from EFA more than IFA instruction. Future studies should continue to examine effects of different attentional focus on other skills.

Where to Focus Attention When Performing the Jump Float Serve in Volleyball

2010 ◽  
Vol 3 (1) ◽  
pp. 56-68 ◽  
Author(s):  
Vickie Grooms Denny
Keyword(s):  
Focus Group ◽  
Focus Of Attention ◽  
Focus Attention ◽  
External Focus ◽  
Attention Focus ◽  
College Female ◽  
Significant Difference ◽  
Internal Focus ◽  
Post Test ◽  
Sport Skills

The purpose of this study was to determine if an external attention focus was more effective than an internal attention focus for college female volleyball players practicing the complex open skill of the jump float serve. Sixteen college females with prior competitive volleyball playing experience were matched into either an internal or external attention focus group, each serving a total of 30 balls in three blocks of ten serves. After the pre-test, two days of practice and day off, a post-test was conducted for both groups. Results demonstrated a 25% improvement for the internal focus group and a 26.8% improvement for the external focus group. These results suggest that both internal and external focuses of attention are beneficial for practicing the complex jump float serve. However, a paired t-test from the improvement scores of both groups demonstrated no significant difference between the two practice conditions suggesting that either an internal focus or an external focus of attention is effective for practicing the complex jump float serve. In this particular study, external focus of attention was not found to be more effective than an internal focus of attention. Since these results do not support much of the research done with attention focus and sport skills, additional studies are needed comparing internal and external focus of attention, especially when practicing open sport skills.

scholarly journals A motor imagery during blind action is guided by the same foci of attention as actual performance in a sample comprising females

2014 ◽  
Vol 7 (2) ◽  
pp. 11-16
Author(s):  
Bassem Khalaf
Keyword(s):  
Mental Imagery ◽  
Focus Of Attention ◽  
Direct Role ◽  
Actual Performance ◽  
External Focus ◽  
Deviation Measure ◽  
Straight Line ◽  
Internal Focus ◽  
Perceptual Representations ◽  
Better Than

There is strong evidence that focussing on the goal of an action improves performance relative to focussing on the concrete motor behaviours. The current study tests whether blind action guided by imagery relies on the same foci of attention. Thirty female participants took part in an experiment. In each condition there were 20 trials, they were asked to close their eyes and draw a straight line between two landmarks on a graphics tablet. We instructed them, in three conditions, to focus on (1) mental imagery of the goal landmark (external focus of attention), (2) drawing a straight line with the fingers (internal focus), or (3) without a specific focus of attention (control). We tested to what extent these attention instructions affected drawing performance, in terms of both deviations of the participants’ lines from an ideal straight line, and the time it took to complete the line. The study revealed that the manipulation specifically affected the deviation measure and that an external focus of attention was better than an internal focus and the control condition. These findings reveal that that mental imagery during blind action relies on same processes as actual performance. These data give perceptual representations of a direct role in motor control. They will be related to current theories of action control (constrained action hypothesis, ideomotor theories, and dual task accounts).

An external focus of attention compared to an internal focus of attention improves anticipatory postural adjustments among people post-stroke

2020 ◽  
Vol 82 ◽  
pp. 100-105
Author(s):  
Saleh M. Aloraini ◽  
Cheryl M. Glazebrook ◽  
Sepideh Pooyania ◽  
Kathryn M. Sibley ◽  
Jonathan Singer ◽  
...  
Keyword(s):  
Focus Of Attention ◽  
Anticipatory Postural Adjustments ◽  
Postural Adjustments ◽  
Post Stroke ◽  
External Focus ◽  
Internal Focus

The automaticity of complex motor skill learning as a function of attentional focus

2001 ◽  
Vol 54 (4) ◽  
pp. 1143-1154 ◽  
Author(s):  
Gabriele Wulf ◽  
Nancy McNevin ◽  
Charles H. Shea
Keyword(s):  
Focus Group ◽  
Dynamic Balance ◽  
Attentional Focus ◽  
Focus Of Attention ◽  
Skill Learning ◽  
External Focus ◽  
Control Processes ◽  
Attention Focus ◽  
Balance Task ◽  
Internal Focus

The present experiment was designed to test the predictions of the constrained-action hypothesis. This hypothesis proposes that when performers utilize an internal focus of attention (focus on their movements) they may actually constrain or interfere with automatic control processes that would normally regulate the movement, whereas an external focus of attention (focus on the movement effect) allows the motor system to more naturally self-organize. To test this hypothesis, a dynamic balance task (stabilometer) was used with participants instructed to adopt either an internal or external focus of attention. Consistent with earlier experiments, the external focus group produced generally smaller balance errors than did the internal focus group and responded at a higher frequency indicating higher confluence between voluntary and reflexive mechanisms. In addition, probe reaction times (RTs) were taken as a measure of the attention demands required under the two attentional focus conditions. Consistent with the hypothesis, the external focus participants demonstrated lower probe RTs than did the internal focus participants, indicating a higher degree of automaticity and less conscious interference in the control processes associated with the balance task.

scholarly journals Threat of shock increases excitability and connectivity of the intraparietal sulcus

eLife ◽  
2017 ◽  
Vol 6 ◽  
Author(s):  
Nicholas L Balderston ◽  
Elizabeth Hale ◽  
Abigail Hsiung ◽  
Salvatore Torrisi ◽  
Tom Holroyd ◽  
...  
Keyword(s):  
Neural Activity ◽  
Brain Connectivity ◽  
Focus Of Attention ◽  
Common Symptom ◽  
Intraparietal Sulcus ◽  
Multimodal Data ◽  
National Health Care ◽  
External Focus ◽  
Internal Focus ◽  
Global Brain

Anxiety disorders affect approximately 1 in 5 (18%) Americans within a given 1 year period, placing a substantial burden on the national health care system. Therefore, there is a critical need to understand the neural mechanisms mediating anxiety symptoms. We used unbiased, multimodal, data-driven, whole-brain measures of neural activity (magnetoencephalography) and connectivity (fMRI) to identify the regions of the brain that contribute most prominently to sustained anxiety. We report that a single brain region, the intraparietal sulcus (IPS), shows both elevated neural activity and global brain connectivity during threat. The IPS plays a key role in attention orienting and may contribute to the hypervigilance that is a common symptom of pathological anxiety. Hyperactivation of this region during elevated state anxiety may account for the paradoxical facilitation of performance on tasks that require an external focus of attention, and impairment of performance on tasks that require an internal focus of attention.

scholarly journals Verbal Instruction Reduces Patellofemoral Joint Loading During Bodyweight Squatting

2020 ◽  
Vol 29 (4) ◽  
pp. 463-468
Author(s):  
Thomas G. Almonroeder ◽  
Emily Watkins ◽  
Tricia Widenhoefer
Keyword(s):  
Patellofemoral Joint ◽  
Attentional Focus ◽  
Focus Of Attention ◽  
Verbal Instruction ◽  
Joint Loading ◽  
Common Component ◽  
External Focus ◽  
Verbal Instructions ◽  
Joint Forces ◽  
Internal Focus

Context: The bodyweight squat exercise is a common component for treatment and prevention of patellofemoral pain; however, it can also place a high load on the patellofemoral joint. Restricting anterior motion of the knees relative to the toes during squatting appears to reduce patellofemoral loading. However, exercise professionals typically rely on verbal instructions to alter squat technique. Objective: To evaluate the influence of verbal instructions regarding squat technique on patellofemoral joint loading. Design: Cross-sectional study. Setting: Motion analysis laboratory. Participants: Eleven uninjured females. Intervention: Participants performed bodyweight squats before (baseline) and after receiving verbal instructions to limit anterior knee motion. Two different types of verbal instruction were used, one intended to promote an internal focus of attention and the other intended to promote an external focus of attention. Three-dimensional kinematics and kinetics were recorded using a multicamera system and force plate. Main Outcome Measures: Sagittal plane patellofemoral joint forces and stress were estimated using a musculoskeletal model. Results: Participants demonstrated a reduction in patellofemoral joint forces (35.4 vs 31.3 N/kg; P = .01) and stress (10.7 vs 9.2 mPa; P = .002) after receiving instructions promoting an internal focus of attention, compared with their baseline trials. Participants also demonstrated a reduction in patellofemoral joint forces (35.4 vs 32.3 N/kg; P = .03) and stress (10.7 vs 9.6 mPa; P = .04) after receiving instructions promoting an external focus of attention (vs baseline). However, there were no significant differences in patellofemoral forces (P = .84) or stress (P = .41) for trials performed with an internal versus external attentional focus. Conclusion: It appears that verbal instruction regarding knee position influences patellofemoral joint loading during squatting.

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