Intensity-Dependent Influence of Interoceptive Accuracy on Psychophysiological Responses During Aerobic Exercise in Physically Inactive Men.

We aimed to investigate the influence of interoceptive accuracy on affective valence, arousal, and ratings of perceived exertion (RPE) during 20 minutes of aerobic exercise at both moderate and heavy intensity among physically inactive men. We divided our participant sample into men with poor heartbeat perception (PHP, n = 13) and good heartbeat perception (GHP, n = 15), based on their cardioceptive accuracy. We measured their heart rate reserve (%HRreserve), perceived affective valence (Feeling Scale; +5/-5), perceived arousal (Felt Arousal Scale, 0-6), and ratings of perceived effort (RPE; Borg scale 6-20) every five minutes during an exercise session on a bicycle ergometer. During moderate-intensity aerobic exercise, the GHP group presented a greater decline in affective valence (p = 0.010; d = 1.06) and a greater increase in RPE (p = 0.004; d = 1.20) compared to the PHP group, with no group differences in %HRreserve (p = 0.590) and arousal (p = 0.629). Psychophysiological and physiological responses to the heavy-intensity aerobic exercise were not different between groups. We concluded that the influence of interoceptive accuracy on psychophysiological responses during submaximal fixed-intensity aerobic exercise was intensity-dependent in these physically inactive men.

The Effect of Resistance Exercise Movement Tempo on Psychophysiological Responses in Novice Men.

Tavares, VDdO, Agrícola, PMD, Nascimento, PHD, Oliveira Neto, L, Elsangedy, HM, and Machado, DGS. The effect of resistance exercise movement tempo on psychophysiological responses in novice men. J Strength Cond Res 34(5): 1264-1273, 2020-This study aimed to compare the effects of movement tempo in resistance exercise (RE) on psychophysiological responses in novice men. Seventeen novice men (24.5 ± 3.2 years; 79.3 ± 8.22 kg; 1.76 ± 0.06 m) performed the 10 repetition maximum (10RM) test for bench press and knee extension in 2 sessions (test-retest) and 2 RE training sessions with different movement tempos in a random and counterbalanced order (4 sets of 10 repetitions). The low tempo RE (LTRE) session was performed using 50% 10RM with 3-0-3-0 seconds (concentric, pause, eccentric, and pause, respectively). The moderate tempo RE (MTRE) session was performed using 80% 10RM with 1-0-1-0 seconds (concentric, pause, eccentric, and pause, respectively). Affective valence (Feeling Scale), perceived activation (FAS), attentional focus, and ratings of perceived exertion (Borg 6-20) were reported after each set. A two-way analysis of variance with repeated measures showed only a significant main effect of the set (all ps < 0.05), indicating changes between sets but not between LTRE and MTRE. In addition, a paired-samples t-test did not find significant differences between LTRE and MTRE, on average, in any psychophysiological responses (all ps > 0.16). Thus, for the protocol tested, there is no psychophysiological advantage to using either LTRE or MTRE in novice men. From a practical perspective, for psychophysiological responses, the present results suggest that it is up to the trainer/coach to decide which RE movement tempo to use, which will depend on the purpose of the training period, specificity, client tolerance of and preference for exercise intensity, and movement tempo.

Can interoceptive accuracy influence maximal performance, physiological and perceptual responses to exercise?

Interoception has been shown to influence self-regulation of effort and perceived exertion during exercise. However, whether interoceptive accuracy influences submaximal and maximal exercise performance, as well as psychophysiological responses to it, remains elusive. We assessed poor (n = 15) and good (n = 17) heartbeat perceivers young men accordingly with their interoceptive accuracy. Heart rate variability (HRV) and blood pressure were measured at rest, and peak power, ratings of perceived exertion (RPE), and HR during a maximal incremental test in a bicycle ergometer. Results: At rest, HR, diastolic and mean blood pressure was lower, and inter-beat intervals were longer for good heartbeat perceivers, with no difference in HRV. During exercise, good and poor heartbeat perceivers exhibited the same submaximal and maximal power, HR, RPE at submaximal intensity, and physical fitness. Interoceptive accuracy does not influence cardiac autonomic modulation perceptual responses and performance at submaximal and maximal intensities during maximal incremental exercise.

Influence of Judo Experience on Neuroelectric Activity During a Selective Attention Task.

OBJECTIVE: We compared the cognitive performance and neuroelectric responses during a selective attentional task in judo athletes with different levels of expertise. METHODS: Judo black and white belt athletes performed both general and specific fitness tests while simultaneously completing a Stroop color-word test recorded by 64 electroencephalogram channels. RESULTS: Cognitive behavioral performance and event-related spectral perturbation (ERSP) present no differences between groups. However, the topographic analysis found different neural source patterns in each group. Judo black belts compared to judo white belts presented a greater peak amplitude of P300 in the middle frontal gyrus and of N200 in the cuneus, but slower latency of P300 in the precuneus. CONCLUSION: Despite no difference in cognitive behavioral performance, judo expertise causes a difference in the allocation of attentional and conflict detection neural resources.