Overnight fasting compromises exercise intensity and volume during sprint interval training but improves high-intensity aerobic endurance

Terada, Tasuku; Eshghi, Saeed Reza Toghi; Liubaoerjijin, Yilina; Kennedy, Michael D.; Myette-Côté, Étienne; Fletcher, Kevin; Boulé, Normand G.

doi:10.23736/s0022-4707.18.08281-6

Cited by 17 publications

(22 citation statements)

References 48 publications

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“…A possible explanation for the improvements in VO 2max with TRF includes an increase of cardiac output due to an increase of sympathetic stimulation during exercise or a greater oxidative capacity in fat adapted muscle. Ultimately, the combination of these phenomena may lead to improvements in aerobic performance in euhydrated conditions [44,48]. Thus, training in the fasted state could provide an adjuvant stimulus to enhance training adaptations while preserving plasma glucose concentrations at normal levels during exercise [45,46].…”

Section: Discussionmentioning

confidence: 99%

Effects of Intermittent Fasting on Specific Exercise Performance Outcomes: A Systematic Review Including Meta-Analysis

et al. 2020

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Intermittent fasting (IF) has been studied in athletes during Ramadan and in those willing to decrease adiposity while maintaining or increasing lean body mass. The purpose of this systematic review was to summarize the effects of IF on performance outcomes. We searched peer-reviewed articles in the following databases: PubMed, Web of Science and Sport Discus (up to December 2019). Studies were selected if they included samples of adults (≥18 years), had an experimental or observational design, investigated IF (Ramadan and time-restricted feeding (TRF)), and included performance outcomes. Meta-analytical procedures were conducted when feasible. Twenty-eight articles met the eligibility criteria. Findings indicated that maximum oxygen uptake is significantly enhanced with TRF protocols (SMD = 1.32, p = 0.001), but reduced with Ramadan intermittent fasting (Ramadan IF; SMD = −2.20, p < 0.001). Additional effects of IF may be observed in body composition (body mass and fat mass). Non-significant effects were observed for muscle strength and anaerobic capacity. While Ramadan IF may lead to impairments in aerobic capacity, TRF may be effective for improving it. As there are few studies per performance outcome, more research is needed to move the field forward.

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Section: Discussionmentioning

confidence: 99%

Effects of Intermittent Fasting on Specific Exercise Performance Outcomes: A Systematic Review Including Meta-Analysis

et al. 2020

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“…In overweight women [42], data showed that 6 wk of either fed or fasted HIIT led to significant and similar improvements in body composition as well as increases in citrate synthase and b-hydroxyacyl-CoA dehydrogenase activity. More recently, Terada et al [43] showed that performing 12 sessions of sprint interval training in the fasted state led to superior improvements in exercise performance in cyclists compared to CHO supplementation. In addition, performing a single Wingate test preceded by glucose ingestion abolished the increase in SIRT1 which plays an important role in lipid oxidation, mitochondrial biogenesis, and glucose control [44].…”

Section: Discussionmentioning

confidence: 99%

No effect of meal intake on physiological or perceptual responses to self-selected high intensity interval exercise (HIIE)

Astorino¹,

Sherrick²,

Mariscal³

et al. 2019

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The present study examined the effect of meal intake on physiological and psychological indices during self-selected high intensity interval exercise (HIIE). Seventeen active men and women (age = 26.4 ± 5.8 yr) completed ramp cycle ergometry to determine maximal oxygen uptake and peak power output. On two subsequent days, they performed a session of self-selected HIIE consisting of ten 1 min bouts separated by 1 min recovery in the fed or fasted state, whose order was randomized. Meal intake consisted of a banana and a Zone™ bar containing 315 kcal, which were ingested 2 h pre-exercise, and the fasted state required no food for > 12 h pre-exercise. Participants ingested an identical meal the evening before each session. Heart rate (HR), oxygen uptake (VO2), blood glucose and blood lactate concentration, rating of perceived exertion (RPE), affect, and enjoyment were measured during exercise. Irrespective of fed state, both bouts elicited intensities equal to 94% HRmax which represents HIIE. Our results showed no difference in HR (174.0 ± 13.5 vs. 173.2 ± 12.9 b/min in fed and fasted state, p = 0.17), VO2 (2.43 ± 0.54 vs. 2.40 ± 0.52 L/min in fed and fasted state, p = 0.14), RPE (p = 0.44), affect (p = 0.79), or enjoyment (103 ± 14 vs. 101 ± 13, p = 0.77) between the fed and fasted state. Despite its high reliance on carbohydrate, performance and perception of low-volume HIIE are not altered by ingestion of a meal before exercise.

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“…Na condição de alimentado, o desempenho aeróbio é prolongado, enquanto que, em jejum, algumas adaptações metabólicas são induzidas aos tecidos periféricos, mas que necessitam de mais investigações (Aird et al, 2018). Nesse mesmo sentido, Terada et al,(2019) relataram que a prática de exercícios aeróbios de alta intensidade em jejum compromete a manutenção da intensidade e do volume durante o exercício, porém, favorece a capacidade de sustentar exercícios de resistência aeróbia de alta intensidade em comparação com aqueles sujeitos alimentados. Contudo, quando são observados atletas que realizam a prática do jejum por questões religiosas, o desempenho é reduzido ou mantido, sem evidencias de melhora (Levy y Chu, 2019).…”

Section: Discussionunclassified

Exercício aeróbio em jejum: prescrição e opinião profissional e sua prática por alunos de academias de musculação

Bernardo¹,

Silva²,

Tozetto³

et al. 2020

Educ. fís. cienc.

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Os objetivos do estudo foram investigar as prevalências da prescriçãoe interpretação profissional e da prática de exercício aeróbio em jejum por alunos praticantes de musculação, bem como, comparar o conhecimento de professores e alunos sobre os potenciais benefícios e riscos desta. Na comparação empregou-se o teste exato de Fischer. Participaram do estudo 110 alunos e 8 professores. Não houve relato de prescrição, enquanto a prática atual de exercício aeróbio em jejum foi de 16,4%. O principal objetivo relatado para a prática foi o emagrecimento. Nos benefícios, os professores relataram em maior proporção que o aeróbio em jejum pode promover melhoria da saúde, mas também reconheceram que a prática pode trazer malefícios à saúde. A divergência entre prevalência de prescrição profissional e prática do exercício aeróbio em jejum sinalizam um provável desconhecimento dos professores acerca da forma como os exercícios aeróbios estão sendo praticados por alunos em academias de musculação. Ademais, o conhecimento dos professores sobre os potenciais riscos dessa prática precisa alcançar seus alunos, objetivando informá-los da possibilidade de eventos indesejáveis à saúde.

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Overnight fasting compromises exercise intensity and volume during sprint interval training but improves high-intensity aerobic endurance

Cited by 17 publications

References 48 publications

Effects of Intermittent Fasting on Specific Exercise Performance Outcomes: A Systematic Review Including Meta-Analysis

Effects of Intermittent Fasting on Specific Exercise Performance Outcomes: A Systematic Review Including Meta-Analysis

No effect of meal intake on physiological or perceptual responses to self-selected high intensity interval exercise (HIIE)

Exercício aeróbio em jejum: prescrição e opinião profissional e sua prática por alunos de academias de musculação

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