Relationship of critical speed derived from a 10-min submaximal treadmill test to 5-km and 10-km running performances.

It has been shown that the critical speed (CS) predicted from a perceptually self-regulated 10-min submaximal treadmill test (T10) is reliable and closely matches the CS estimated from conventional methods. To assess the relationship between the T10 and 5-km and 10-km running performances, 36 recreational runners (mean SD: age: 32.2 ± 6.2 years, height: 173.2 ± 7.3 cm, weight: 70.9 ± 8.8 kg, maximal oxygen uptake (V̇O2max): 53.3 ± 6.1 mL·kg-1·min-1) performed a ramp incremental test and 2 T10 tests (the first as a familiarization trial). Results showed that the T10 CS (3.9 ± 0.44 m·s-1) was significantly correlated with runners' last 6 months best performances in 5 km (20.3 ± 2.7 min; r = -0.90) and 10 km (42.7 ± 5.7 min; r = -0.91), the V̇O2max (r = 0.75), the speed associated with the gas exchange threshold (vGET: 3.38 ± 0.36 m·s-1; r = 0.76), the speed associated with the second ventilatory threshold (vVT2: 4.15 ± 0.49 m·s-1; r = 0.84), and the speed associated with the V̇O2max (vV̇O2max: 4.78 ± 0.54 m·s-1; r = 0.87). Moreover, 79% and 83% of the variance in 5-km and 10-km performances could be explained solely by the CS predicted from the T10. Results evidenced the strong relationship and practical performance relevance of the T10 CS test. Novelty: Critical speed derived from a 10-min submaximal treadmill test (T10) is significantly correlated with 5-km and 10-km running performances. The T10 critical speed test may represent a useful tool for assessing running performance capabilities.

Effect of Different Training Programs at Self-Selected Intensity on Body Composition, Perceptual Responses and Fitness Outcomes in Obese Women.

Obesity induces several disorders, such as android obesity, insulin resistance, and coronary/peripheral artery disease, and obese individuals commonly have low adherence to training programs. Exercise at self-selected intensity is a feasible strategy to avoid dropouts of training routines. We aimed to assess the effects of different training programs at self-selected intensity on body composition, ratings of perceived exertion (RPE), feelings of pleasure and displeasure (FPD) and fitness outcomes (maximum oxygen uptake (VO2max) and maximum dynamic strength (1RM)) in obese women. Forty obese women (n = 40; Body Mass Index: 33.2 ± 1.1 kg.m-2) were randomly allocated to combined training (CT = 10), aerobic training (AT = 10), resistance training (RT = 10) and control group (CG = 10). The frequency that CT, AT and RT performed the training sessions was 3 times per week during 8 weeks. Body composition (DXA), VO2max and 1RM were assessed at baseline and after intervention. All participants were on a restricted dietary intake aiming to ingest 2.650 kcal per day. Post hoc comparisons revealed that CT promotes a larger decrease in body fat percentage (p = 0.001), body fat mass (p = 0.004) than other groups. CT and AT elicited higher V•O2max increases (p = 0.014) than RT and CG, and 1RM values were higher in CT and RT (p = 0.001) than AT and CG at post-intervention. All training groups presented low RPE and high FPD over the training sessions, but only the CT was effective to reduce body fat percentage and body fat mass in obese women. In addition, CT was effective to increase simultaneously maximum oxygen uptake and maximum dynamic strength in obese women.

Influence of the use of compression stockings on physiological, perceptual, and affective responses during running in recreational runners / Influência do uso de meias de compressão nas respostas fisiológicas, perceptuais e afetivas durante a corridas em corridores recreacionais

Este estudo objetivou comparar a influência do uso de polainas de compressão nas respostas fisiológicas, perceptuais e afetivas durante a corrida em corredores recreacionais. Dez corredores recreacionais (31,5 ± 9,7 anos) participaram deste estudo. Todos os sujeitos completaram três visitas ao laboratório: (a) familiarização e teste incremental até a exaustão (b) duas sessões de exercícios realizadas em dias diferentes. Cada sessão envolveu o mesmo protocolo de exercícios (20 minutos continuamente a uma intensidade de 80% da velocidade máxima da esteira a lcançada no teste incremental até a exaustão), com ou sem o uso de meias de compressão. A Felt Arousal Scale (FAS), Feeling Scale (FS), percepção subjetiva de esforço (PSE), o consumo de oxigênio (VO2) e a frequência cardíaca (FC) foram registradas durante cada sessão experimental. Os resultados não mostraram diferenças entre as condições fisiológicas (% VO2máx: 88,1 ± 8,3 vs 87,1 ± 11,32; % HR: 91,8 ± 2,8 vs 90,8 ± 3,2), e as respostas perceptuais (PSE: 6,4 ± 1,2 vs 6,2 ± 1,4) e afetivas (FS: 0,35 ± 2,4 vs 0,37 ± 2,3; FAS: 4,3 ± 0,7 vs 4,3 ± 1,1) durante cada sessão de exercício. Os resultados do presente estudo indicam que o uso de polainas de compressão não promove benefícios fisiológicos, perceptuais e afetivas durante a corrida em corredores recreacionais.(AU)

This study aimed to compare the influence of wearing compression stockings on physiological, perceptual, and affective respon ses during running in recreational runners. Ten recreational runners (31.5 ± 9.7 years) participated in this study. All subjects completed three visits to the lab: (a) familiarization and incremental test until exhaustion (b) two exercise sessions conducted on different days. Each session involved the same exercise protocol (20 min continuously at an intensity of 80% of the maximum treadmill speed achieved in the incremental test until exhaustion), with or without the use of compression stockings. The Felt Arousal Scale (FAS), Feeling Scale (FS), Rating of Perceived Exertion (RPE), oxygen consumption (VO2), and heart rate (HR) were recorded during each experimental session. Results showed no differ ences between the conditions of physiological (% VO2máx: 88.1 ± 8.3 vs 87.1 ± 11.32; % HR: 91.8 ± 2.8 vs 90.8 ± 3.2), perceptual (RPE: 6.4 ± 1.2 vs 6.2 ± 1.4) and affective (FS: 0.35 ± 2.4 vs 0.37 ± 2.3; FAS: 4.3 ± 0.7 vs 4.3 ± 1.1) responses during each exercise sessio n. The results of the present study suggest that wearing of compression stockings does not promote physiological, perceptual, and affective benefits during running of recreational runners.(AU)

A submaximal treadmill test to predict critical speed.

We assessed the reliability and validity of a 10-min submaximal treadmill test (T10) to predict critical speed (CS). Forty-two runners completed a familiarization trial plus two experimental trials (T10 test and T10 retest). Reliability between the T10 test and T10 retest was assessed using coefficient of variation (CoV), limits of agreement (LoA) and intraclass correlation (ICC). For validity, the speed from the T10 retest was compared with the CS determined from 3 runs on separate days on a running track over 1200, 2400, and 3600 m (field test). Reliability between the T10 test and T10 retest showed a CoV of 3.4%, LoA of 0.05 ± 0.39 m.s-1, and an ICC of 0.93. Validity showed that speed (m.s-1) (T10 retest: 3.86 ± 0.51; field test: 3.88 ± 0.55) did not differ between trials. The T10 retest was highly correlated with the field test, r = 0.93, and the standard error for the estimate of CS using the T10 retest was 0.06 m.s-1, and the LoA was 0.02 ± 0.40 m.s-1. A submaximal 10-min treadmill test (T10) provides a practical and accessible method to estimate CS.

Perceived Exertion and Affect From Tai Chi, Yoga, and Stretching Classes for Elderly Women.

Tai Chi, yoga, and stretching regimens are gaining popularity as alternatives to more traditional exercise, but there is scant research regarding participants' perceived exertion and affective responses to these practices. We compared experienced states of perceived exertion, feelings of pleasure/displeasure, and arousal in 70 elderly women enrolled in groups of Tai Chi ( n = 26), yoga ( n = 25), or stretching ( n = 19) classes. Mean rates of perceived exertion, feelings of pleasure, and arousal responses were significantly higher over the time course of all three groups, while the overall mean perceived exertion ( Somewhat Hard on the Borg CR-10 scale) and pleasure responses (∼ Very Good on the Feeling Scale) were similar between them. The circumplex model of affect showed that changes occurred in the high-activation pleasure quadrant (energy on the Felt Arousal Scale). From a practical perspective, the exercise intensity and affective responses elicited during these classes made participants feel good and infused with energy, likely creating a positive memory and reinforcing continued physical activity participation.

Physiological, Perceptual, and Affective Responses to Six High-Intensity Interval Training Protocols.

This study examined the extent to which different high-intensity interval training (HIIT) and sprint interval training (SIT) protocols could influence psychophysiological responses in moderately active young men. Fourteen participants completed, in a randomized order, three cycling protocols (SIT: 4 × 30-second all-out sprints; Tabata: 7 × 20 seconds at 170% ⋮O2max; and HIIT: 10 × 60 seconds at 90% HRmax) and three running HIIT protocols (4 × 4 minutes at 90%-95% HRmax, 5 × at v⋮O2max, and 4 × 1,000 meters at a rating of perceived exertion (RPE) of 8, from the OMNI-Walk/Run scale). Oxygen uptake (⋮O2), heart rate, and RPE were recorded during each interval. Affective responses were assessed before and after each trial. The Tabata protocol elicited the highest ⋮O2 and RPE responses, and the least pleasant session-affect among the cycling trials. The v⋮O2max elicited the highest ⋮O2 and RPE responses and the lowest mean session-affect among the running trials. Findings highlight the limited application of SIT and some HIIT protocols to individuals with low fitness levels.

Effect of combined training on ratings of perceived exertion and sensation of pleasure/displeasure in obese women / O efeito do treinamento combinado sobre a percepção subjetiva do esforço e sensação de prazer/desprazer em mulheres obesas

Abstract Self-selected intensities during walking and resistances training by obese subjects are below recommended guidelines to improve health-related outcomes. From this perspective, there is the possibility of combining both aerobic and resistance training in a single exercise session with the purpose of increasing training volume and optimizing physiological adaptations, while preserving positive affective responses. Until now, no study has assessed ratings of perceived exertion (RPE) and sensations of pleasure/displeasure (SPD) during a combined training session in obese women. The present study aimed to: (1) assess RPE and SPD during a combined training session in obese women; and (2) compare RPE and SPD responses during different resistance training exercises. Twelve sedentary obese women (age: 39.2 ±11.1 years; height: 160.4 ± 5.9 cm; body mass: 87.4 ± 5.8 kg; BMI: 33.6 ±1.2 kg.m-2) performed a combined aerobic and resistance training session. RPE and SPD were recorded during the session. Data were analyzed with One-way repeated measures ANOVA and Bonferroni's post hoc tests. The results revealed that, despite the increase in exercise volume, RPE responses were low and affective responses were positive. There were no significant differences in RPE and SPD values among resistance exercises. Combined aerobic and resistance training can be prescribed during the initial phase of a training program because it produces low perceived exertion and positive affective responses.

Resumo As intensidades autosselecionadas observadas tanto na caminhada como no treinamento resistido em obesos são inferiores as recomendações do ACSM, (2011) as quais, promovem melhora na aptidão cardiorrespiratória e força muscular. A partir disso, surge a hipótese de combinar os exercícios, aeróbio e resistido em uma única sessão com o intuito de aumentar o volume de treinamento otimizando os ajustes fisiológicos tentando preservar baixos níveis de percepção subjetiva do esforço (PSE) e sensações prazerosas (SPD) observadas nessa intensidade. Desta maneira, o presente estudo teve três objetivos: 1) verificar ao longo de uma sessão de treinamento combinado a PSE e a SPD em mulheres obesas; 2) analisar se ocorrerá alteração na PSE e SPD entre os diferentes exercícios resistidos; 3) investigar se existe correlação entre a PSE e SPD. Participaram doze mulheres obesas não praticantes de exercício físico com idades de 39.2±11.1 anos e IMC: 33.6±1.2 kg.m-2 as quais, foram submetidas a uma sessão de treinamento combinado com duração total de 60 minutos. Ao longo da sessão foram reportadas a PSE e SPD. Para analisar os dados foi utilizado uma ANOVA de medidas repetidas seguido de um Post Hock de Bonferroni. Os resultados demonstram que o volume aumentado produziu baixos valores de PSE (~3) e sensações prazerosas (~3) ao longo da sessão. Não foi encontrado diferença significativa da PSE e SPD entre os exercícios resistidos e foi evidenciada uma relação negativa moderada significativa (r= -0.624; p= 0.001 com 95% IC: -0.710; -0.280) entre a PSE e SPD. Sendo assim, o treinamento combinado pode ser prescrito para mulheres obesas, pois, produz baixa percepção de esforço e sensações prazerosas.

Effect of Music Tempo on Attentional Focus and Perceived Exertion during Self-selected Paced Walking.

This study investigated the influence of music on the rating of perceived exertion (RPE) and attentional focus during walking at a self-selected pace. Fifteen overweight and obese women volunteered to participate in the study. They underwent four sessions: the first for incremental maximal test and anthropometric measurement followed by three experimental sessions. After the first session, they were exposed to three 30-minute walking sessions at a self-selected pace in a counterbalanced order: fast-tempo music (FT), medium-tempo music (MT) and no-music control (NM). Borg's RPE Scale and an Attentional Focus Questionnaire were used to measure the perceptual response and attentional focus, respectively. Results showed that the RPE was higher in the no-music control than in the medium-tempo music (12.05 ± 0.6 vs. 10.5 ± 0.5). Furthermore, dissociative attentional focus was greater for both conditions with music in comparison with the no-music control (NM= 39.0 ± 4.1; MT= 48.4 ± 4.1 and FT= 47.9 ± 4.5). The results indicated that the use of music during walking can modulate attentional focus, increasing dissociative thought, and medium-tempo music can reduce the RPE.

Are rate of perceived exertion and feelings of pleasure/displeasure modified in elderly women undergoing 8 week of strength training of prescribe intensity?

[Purpose] The aim of the present study was to verify the rate of perceived exertion and feelings of pleasure/displeasure in elderly women, who did normally perform physical exercises, following eight weeks of strength training in a constant routine. [Subjects and Methods] Eleven sedentary women were subjected to anthropometric assessment. The maximum load (100%) for each used in this study was determined by performing a test to determined the 1RM for each of them according to the protocol of Fatouros et al. and the Feeling Scale and RPE scale were explained to the women. After these initial procedures, the subjects followed a routine for strength training, performing three sets of repetitions at 70% of the one-repetition maximum for each exercise (bench press, leg extension, pulldown, leg curl) without modifying the exercises and their execution order. The frequency of training was three days per week. ANOVA was used to analyze the behavior of the dependent variable, and the post hoc tests were used to identify significant differences. [Results] Strength increased only in the fifth week. The rate of perceived exertion showed a reduction only in the fifth week in the leg extension, pulldown, leg curl. [Conclusion] The percentage of 70% the one-repetition maximum recommended to increase the strength gains and hypertrophy of skeletal muscle does not provide feelings of displeasure when performing proposed exercise. However, it may be possible to modulate this percentage to obtain more pleasant feelings over two months.

Exercícios com pesos sobre as respostas afetivas e perceptuais / Weight exercise on affective and perceptual responses / Ejercicios con peso sobre las respuestas afectivas y perceptuales

INTRODUÇÃO: Sensações de prazer/desprazer são moduladas de acordo com as intensidades prescritas para o exercício, demonstrando uma relação simples, onde quanto mais intenso o estímulo, maior o esforço percebido. OBJETIVO: Verificar as diferenças entre as respostas perceptuais e afetivas agudas em diferentes intensidades de exercícios com pesos em mulheres idosas. MÉTODOS: Quatorze mulheres com idade entre 65 e 75 anos, previamente sedentárias, com sobrepeso, foram submetidas a três diferentes intensidades de treinamento com pesos: 35% e 70% de 1RM, e autosselecionada. Foram avaliados o afeto e a percepção subjetiva do esforço (PSE). Após 30 minutos do término da sessão, foi avaliada a percepção subjetiva do esforço da sessão (PSE-S). Foi utilizado o teste de variância One-way ANOVA de um fator de medidas repetidas para as variáveis dependentes PSE-S, PSE e afeto, seguido de post hock de Tukey. RESULTADOS: A PSE-S demonstrou diferença significativa da testagem (F (7,99) =15,358; p=0,001) entre as intensidades, assim como para PSE entre cada exercício. A PSE-S, para 35% de 1RM, foi menor, quando comparada à PSE-S para 70% de 1RM, e à intensidade autosselecionada. A intensidade de 70% de 1RM, quando comparada com a intensidade autosselecionada, não apresentou diferença significativa. Em relação a PSE nos exercícios, foi observado um esforço significativamente maior (p < 0,001) para 70% de 1RM, quando comparados com a autosseleção da carga. O afeto revelou diferença significativa na intensidade de 35% de 1RM, mostrando uma resposta mais prazerosa, quando comparado à carga de 70% de 1RM, e à autosseleção da carga. CONCLUSÃO: Os resultados demonstraram que baixas intensidades são percebidas como menor esforço e este fato contribuiu para a produção de respostas afetivas mais prazerosas. Além disso, fatores interindividuais são capazes de modular estas respostas, possibilitando a diminuição da percepção do esforço em intensidades mais vigorosas. .

INTRODUCTION: Feelings of pleasure/displeasure are modulated according to prescribed exercise intensities, where the more intense the stimulus, the higher the perception of effort. OBJECTIVE: To investigate the differences between perceptual and affective responses to different intensities of acute resistance training in elderly women. METHODS: Fourteen women aged between 65 and 75 years old, previously sedentary and overweight were subjected to three different intensities of resistance training: 35% and 70% 1-RM, and self-selected. Affect and rate of perceived exertion (RPE) were assessed. Session rate of perceived exertion (RPE-S) was assessed 30 minutes after the conclusion of the session. One way ANOVA test for repeated measures was used for the dependent variables (RPE-S, RPE and affect), followed by Tukey's post hock. RESULTS: RPE-S showed a significant difference (F (7.99) = 15.358; p = 0.001) between the intensities as well as RPE between each exercise. RPE-S of 35% 1-RM was lower when compared to RPE-S for 70% 1-RM, and self-selected intensity. The intensity of 70% 1-RM, compared with the self-selected intensity, showed no significant difference. Regarding RPE during the exercises, significantly more effort (p<0.001) was observed for the 70% 1-RM when compared with the self-selection of the load. The affect revealed a significant difference for the intensity of 35% 1-RM, showing a more pleasant response when compared to the load of 70% 1-RM, and self-selection of the load. CONCLUSION: Results showed that low intensities are perceived as less effort and this fact contributed to the production of more pleasurable affective responses. Moreover, inter-individual factors between subjects can modulate these responses, enabling the reduction of perceived exertion in more vigorous intensities. .

INTRODUCCIÓN: Los sensaciones de placer/desplacer son moduladas de acuerdo con las intensidades prescritas para el ejercicio, demostrando una relación simple, en donde cuanto más intenso es el estímulo, mayor será el esfuerzo percibido. OBJETIVO: Verificar las diferencias entre las respuestas perceptuales y afectivas agudas en diferentes intensidades de ejercicio en mujeres ancianas. MÉTODOS: Catorce mujeres entre 65 y 75 años, previamente sedentarias, con sobrepeso, fueron sometidas a tres intensidades diferentes de entrenamiento con pesos: 35% y 70% de 1RM, y autoseleccionada. Fueron evaluados el afecto y la percepción subjetiva del esfuerzo (PSE). Después de 30 minutos del término de la sesión, fue evaluada la percepción subjetiva del esfuerzo de la sesión (PSE-S). Se utilizó ANOVA de un factor de medidas repetidas para las variables dependientes PSE-S, PSE y afecto, seguido por post hoc de Tukey. RESULTADOS: La PSE-S demostró diferencia significativa del test (F (7,99) = 15,358, p = 0,001) entre las intensidades, así como para PSE entre cada ejercicio. La PSE-S para 35% de 1RM fue menor, cuando comparada con la PSE-S para 70% de 1RM, e intensidad autoseleccionada. La intensidad de 70% de 1RM, cuando comparada con la intensidad autoseleccionada, no mostró diferencias significativas. En relación a la PSE con los ejercicios, fue observado un esfuerzo significativamente mayor (p <0,001) para 70% de 1RM, cuando comparados con la autoselección de carga. El afecto reveló diferencia significativa en la intensidad de 35% de 1RM, mostrando una respuesta más placentera, cuando comparado con la carga de 70% de 1RM, y autoselección de carga. CONCLUSIÓN: Los resultados demostraron que bajas intensidades son percibidas como menor esfuerzo y este hecho contribuyó para la producción de respuestas afectivas más placenteras. Además, los factores interindividuales son capaces de modular estas respuestas, posibilitando la disminución de la percepción ...