Acute fatigue, and perceptual responses to resistance exercise

Fisher, James; Farrow, Joshua; Steele, James

doi:10.1002/mus.25645

Cited by 21 publications

(29 citation statements)

References 31 publications

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“…The findings of other authors have suggested a higher accuracy in experienced participants (Steele et al, 2017a;Hackett et al, 2012;Hackett et al, 2016;Zourdos et al, 2016), especially when using higher loads (Zourdos et al, 2016). Indeed, predictive ability might be higher using higher loads, as discomfort was shown to be less in this case (Fisher, Farrow & Steele, 2017a;Stuart, Steele, Gentil, Giessing & Fisher, 2018). The results of Altoé Lemos et al (2017) suggest that predictive ability improves with increased load, and the apparent improvement in predictive ability with experience reported by Steele et al (2017a) may have been due to the increase in load used with experience.…”

Section: Discussionmentioning

confidence: 76%

“Just one more rep!” – Ability to predict proximity to task failure in resistance trained persons

Armes¹,

Standish-Hunt²,

Androulakis-Korakakis³

et al. 2019

Preprint

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In resistance training, the ability to predict momentary task failure (MF; i.e. maximum effort) during submaximal exercise may be affected by congruence of how (sub-)maximal effort is perceived compared with the actual effort required. The present study examined participants with at least one year of resistance training experience predicting their proximity to MF in two different experiments using a deception design. Participants performed four trials of knee extensions with single sets to their self-determined repetition maximum (sdRM) and MF using a baseline 70%1RM in the first experiment (n = 14). Aiming to minimize participants’ variability in repetition performances, they performed at 70% of their daily MVC instead of their baseline 1RM in the second experiment (n = 24). Results suggested that participants typically under predicted the number of repetitions they could perform to MF. These results suggest that participants with at least one year of resistance training experience are not adequately accurate at gauging effort in submaximal conditions during the gestalt experience of resistance training. This suggests that perceptions of effort during RT task performance may not be congruent with the actual effort required. This has implications for controlling, programming and manipulating effort in RT and potentially on the magnitude of desired adaptations such as improvements in muscular hypertrophy and strength.

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Section: Discussionmentioning

confidence: 76%

“Just one more rep!” – Ability to predict proximity to task failure in resistance trained persons

Armes¹,

Standish-Hunt²,

Androulakis-Korakakis³

et al. 2019

Preprint

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“…294 However, based on the evidence presented herein as well as previous literature 3, 16,17 this lighter-load 295 exercise likely produces a greater degree of discomfort which might result in persons failing to perform 296 higher effort exercise (e.g. reaching MF) in real world settings, and could result in suboptimal 297 adaptations over a training intervention.…”

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confidence: 75%

“…14,15 A number of studies where participants have been 76 instructed to differentiate their perceptions of effort and discomfort 11 have reported greater discomfort 77 for more fatiguing conditions using lower loads, higher time under load and/or repetitions 78 performed. 3,16,17 It seems likely that this results from afferent feedback 9 due to a decrease in pH, 79 elevated blood lactate (BLa), cortisol, and inorganic phosphate (P i ) along with increases in H + as a result 80 of the prolonged elevated adenosine triphosphate (ATP) production. [18][19][20][21] 81…”

mentioning

confidence: 99%

Peer Review #1 of "Heavier- and lighter-load isolated lumbar extension resistance training produce similar strength increases, but different perceptual responses, in healthy males and females (v0.2)"

Halperin¹

2018

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Objectives:Muscles dominant in type I muscle fibres, such as the lumbar extensors, are often trained using lighter loads and higher repetition ranges. However, literature suggests that similar strength adaptations can be attained by the use of both heavier-(HL) and lighter-load (LL) resistance training across a number of appendicular muscle groups. Furthermore, LL resistance exercise to momentary failure might result in greater discomfort. Design: The aims of the present study were to compare strength adaptations, as well as perceptual responses of effort (RPE-E) and discomfort (RPE-D), to isolated lumbar extension (ILEX) exercise using HL (80% of maximum voluntary contraction; MVC) and LL (50% MVC) in healthy males and females. Methods: Twenty-six participants (n=14 males, n=12 females) were divided in to sex counter-balanced HL (23 ±5years; 172.3 ±9.8cm; 71.0 ±13.1kg) and LL (22 ±2years; 175.3 ±6.3cm; 72.8 ±9.5kg) resistance training groups. All participants performed a single set of dynamic ILEX exercise 1 day/week for 6 weeks using either 80% (HL) or 50% (LL) of their MVC to momentary failure. Results: Analyses revealed significant pre-to post-intervention increases in isometric strength for both HL and LL, with no significant between-group differences (p> 0.05). Changes in strength index (area under torque curves) were 2891 Nm·degrees[95%CIs 1612 to 4169] and 2865 Nm·degrees [95%CIs 1587 to 4144] for HL and LL respectively. Changes in MVC were 51.7 Nm [95%CIs 24.4 to 79.1] and 46.0 Nm [95%CIs 18.6 to 73.3] for HL and LL respectively. Mean repetitions per set, total training time and discomfort were all significantly higher for LL compared to HL (26 ±8 vs. 8 ±3 repetitions, 158.5 ±47 vs. 50.5 ±15 seconds, and 7.8 ±1.8 vs. 4.8 ±2.5, respectively; all p< 0.005). Conclusions:The present study supports that that low-volume, low-frequency ILEX resistance exercise can produce similar strength increases in the lumbar extensors using either HL or LL. As such personal trainers, trainees and strength coaches can consider PeerJ reviewing PDF | Manuscript to be reviewed other factors which might impact acute performance (e.g. effort and discomfort during the exercise). This data might prove beneficial in helping asymptomatic persons reduce the risk of low-back pain, and further research, might consider the use of HL exercise for chronic low-back pain symptomatic persons.PeerJ reviewing PDF |

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Section: Introductionmentioning

confidence: 99%

“…Ratings of perceived exertion (RPE) are often integrated into resistance training to prescribe exercise intensity [13,16,21,30,31]. Little is known, however, regarding the specific relationships between RPE and physiological mechanisms associated with fatigue resulting from resistance exercise [13,16,21,29,37]. A limited number of previous aerobic [6,14,19] and resistance [21,29] exercise studies have utilized the RPE clamp model [39] to examine fatigue-induced changes in various physiological outcome variables such as blood pressure, oxygen consumption, neuromuscular parameters, power output, and force.…”

Section: Introductionmentioning

confidence: 99%

Sex-Related Differences in Performance Fatigability Independent of Blood Flow Following a Sustained Muscle Action at a Low Perceptual Intensity

Keller

Housh

Hill

et al. 2020

J. of SCI. IN SPORT AND EXERCISE

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The purpose of this investigation was to use the RPE clamp protocol to examine sex-related differences in performance fatigability and neuromuscular responses as the result of a sustained isometric leg extension muscle action anchored to RPE = 2. Twenty adults (10 men, 10 women) performed sustained muscle actions at RPE = 2 for 5-min. Maximal voluntary isometric contractions (MVIC) were performed prior to and following the sustained muscle actions. Neuromuscular (electromyographic and mechanomyographic) parameters and force were recorded, and the values were normalized to respective MVICs and calculated every 5% across the 5-min work bout. Femoral artery blood flow (FABF) was assessed at pretest, immediately posttest, and 5-min posttest. Polynomial regression was used to define the individual and composite normalized neuromuscular and force versus time relationships during the sustained muscle action. Mixed factorial ANOVAs were used to examine differences in performance fatigability and blood flow. For performance fatigability, the men (62.4 ± 14.4 kg-43.1 ± 11.5 kg) exhibited a significantly (P < 0.05) greater decrease pretest to posttest in MVIC than the women (44.1 ± 4.8 kg vs. 38.1 ± 6.1 kg). There were different fatigue-induced neuromuscular patterns of responses between the men and women across time. For blood flow responses, however, there was no sex-related difference, but pretest (283.3 ± 70.8 mL/min) was significantly (P < 0.05) less than immediately posttest (424.5 ± 133.5 mL/min) and 5-min posttest (324.4 ± 78.3 mL/min). Thus, men demonstrated a greater degree of performance fatigability than the women, which was independent of differences in FABF. Factors such as the neuromuscular system and muscle morphology likely contributed to the difference in performance fatigability.

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Acute fatigue, and perceptual responses to resistance exercise

Abstract: Fatigue as a decrement in force production appears to follow a more complex relationship than simply 100% minus the force requirements of the task relative to a maximal voluntary contraction. Muscle Nerve 56: E141-E146, 2017.

Cited by 21 publications

References 31 publications

“Just one more rep!” – Ability to predict proximity to task failure in resistance trained persons

“Just one more rep!” – Ability to predict proximity to task failure in resistance trained persons

Peer Review #1 of "Heavier- and lighter-load isolated lumbar extension resistance training produce similar strength increases, but different perceptual responses, in healthy males and females (v0.2)"

Sex-Related Differences in Performance Fatigability Independent of Blood Flow Following a Sustained Muscle Action at a Low Perceptual Intensity

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