Carbohydrate restriction: Friend or foe of resistance-based exercise performance?

Cholewa, Jason M.; Newmire, Daniel E.; Zanchi, Nelo Eidy

doi:10.1016/j.nut.2018.09.026

Cited by 23 publications

(20 citation statements)

References 108 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Research examining the effects of different levels of CHO restriction has produced contradictory results. Cholewa et al recently concluded that a low glycogen or CHO availability does not negatively affect acute resistance-exercise performance when the training volume is lower than ~8 sets with a duration <45 min (low volume and high intensity), but increasing the CHO intake after a restriction period may enhance acute strength performance, muscular endurance, and hypertrophy [59]. They also suggested that acutely increasing blood glucose before resistance exercise might improve performance in training sessions >50 min (high volume and moderate intensity) [53].…”

Section: Carbohydrates and Supplementation Timing In Exercisementioning

confidence: 99%

Carbohydrate Availability and Physical Performance: Physiological Overview and Practical Recommendations

Mata¹,

Valenzuela

Gimenez

et al. 2019

Nutrients

View full text Add to dashboard Cite

Strong evidence during the last few decades has highlighted the importance of nutrition for sport performance, the role of carbohydrates (CHO) being of special interest. Glycogen is currently not only considered an energy substrate but also a regulator of the signaling pathways that regulate exercise-induced adaptations. Thus, low or high CHO availabilities can result in both beneficial or negative results depending on the purpose. On the one hand, the depletion of glycogen levels is a limiting factor of performance during sessions in which high exercise intensities are required; therefore ensuring a high CHO availability before and during exercise is of major importance. A high CHO availability has also been positively related to the exercise-induced adaptations to resistance training. By contrast, a low CHO availability seems to promote endurance-exercise-induced adaptations such as mitochondrial biogenesis and enhanced lipolysis. In the present narrative review, we aim to provide a holistic overview of how CHO availability impacts physical performance as well as to provide practical recommendations on how training and nutrition might be combined to maximize performance. Attending to the existing evidence, no universal recommendations regarding CHO intake can be given to athletes as nutrition should be periodized according to training loads and objectives.

show abstract

Section: Carbohydrates and Supplementation Timing In Exercisementioning

confidence: 99%

Carbohydrate Availability and Physical Performance: Physiological Overview and Practical Recommendations

Mata¹,

Valenzuela

Gimenez

et al. 2019

Nutrients

View full text Add to dashboard Cite

show abstract

“…It has been shown that in order to elicit notable changes in body composition, a proper nutrition plan is required [6]. Therefore, to optimize the body composition of a powerlifter, an emerging approach is to apply nutritional periodization strategies [7]. Furthermore, a strength athlete should ensure: sufficient caloric intake to support energetic demands, adequate carbohydrate consumption to fuel the lifter during training, and optimal protein ingestion to support the recovery process [7].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, to optimize the body composition of a powerlifter, an emerging approach is to apply nutritional periodization strategies [7]. Furthermore, a strength athlete should ensure: sufficient caloric intake to support energetic demands, adequate carbohydrate consumption to fuel the lifter during training, and optimal protein ingestion to support the recovery process [7]. Veganism is a dietary pattern that is adopted and publicized by some high-level athletes.…”

Section: Introductionmentioning

confidence: 99%

Case Study: Body Composition Changes Resulting from a Nutritional Intervention on a Professional Vegan Powerlifter

et al. 2020

View full text Add to dashboard Cite

Powerlifting is a weight-class strength sport where achieving low fat mass (FM) and high fat-free mass (FFM) is desirable to improve performance. Recent studies have evaluated the nutritional considerations of different eating patterns, such as vegan diets (VD), in athlete populations. VD are a challenge for athletes who want to attain body composition changes. The aim of this case study is to report on the body composition changes and subjective feelings of a male professional vegan powerlifter following VD for six weeks. The body mass of the powerlifter decreased from 79.3 to 77.4 kg (2.39%). Along with this, FM decreased from 15.0 to 11.4 kg (24%). Conversely, FFM increased from 64.3 to 66.0 kg (2.64%). Moreover, the powerlifter communicated no subjective feelings of low energy availability during training sessions. The VD might compromise adherence in a nutritional intervention which aims to improve body composition due to the nutritional requirements for fat loss. Therefore, more appropriate health assessments, including blood and psychological tests, are required for professional athletes. This short-term VD intervention was satisfactory for improving body composition and no adverse outcomes were reported.

show abstract

“…Dois aspectos muito importantes a serem enfatizados sobre as estratégias training low são: 1) elas são voltadas unicamente para a melhora do desempenho em modalidades de endurance, tendo pouca, ou quase nenhuma aplicação no tocante à otimização das respostas adaptativas em atividades de força e potência 24 . Nestas atividades, o incremento do desempenho não advém prioritariamente de uma melhora na capacidade oxidativa muscular, mas sim de uma maior síntese de proteínas miofibrilares, da melhora na taxa de disparos de potenciais de ação e no recrutamento de unidades motoras 25 .…”

Section: Considerações Finais E Futuras Perspectivasunclassified

“…Nestas atividades, o incremento do desempenho não advém prioritariamente de uma melhora na capacidade oxidativa muscular, mas sim de uma maior síntese de proteínas miofibrilares, da melhora na taxa de disparos de potenciais de ação e no recrutamento de unidades motoras 25 . Substratos energéticos como o GLICO muscular mostram-se extremamente importantes para a manutenção da intensidade do exercício, bem como para o aumento do volume muscular como um todo 24 ; 2) elas levam a uma diminuição da intensidade das sessões, um aspecto que deve ser balanceado contra os argumentos em relação à "suprarregulação molecular" das adaptações ao treinamento 9 . O direcionamento para adaptações moleculares pode ser realizado por meio de um balanço de sessões com baixa disponibilidade de CHO, enquanto sessões de treino de alta intensidade devem ser supridas com alta disponibilidade de CHO, permitindo, assim, que os atletas mimetizem o ritmo das competições e possam se habituar com as estratégias competitivas 7,9 .…”

Section: Considerações Finais E Futuras Perspectivasunclassified

Bases moleculares das estratégias de treinamento com baixa disponibilidade de carboidratos

Ide¹,

Rosa²

2019

Rev Bras Nutr Func

View full text Add to dashboard Cite

Based on the results of some studies that established relationships between intracellular signaling pathways activation and the reduction of intramuscular glycogen (GLICO) stores, training strategies with low carbohydrate availability CHO (training low) have been proposed as potentiators for endurance training adaptations. However, as GLICO represents an important source of energy for exercise intensity maintenance, its degradation, and/or not resynthesis, may lead to a decrease of session's intensity, consisting an aspect to be balanced against the "supra molecular regulation" arguments. Some training low strategies induce the intramuscular GLICO depletion by reducing the CHO intake. However, the original studies that provided the training low molecular foundation promoted the GLICO depletion throughout the exercise intervention, and not directly by the reduction of CHO intake. Longitudinal researches with ketogenic diets (low CHO and high fat) show a depreciation of the athlete's performance and overall health, and that the exercise itself (high or low intensity) is possibly the most effective and safe alternative to reduce the intramuscular GLICO stores and the activation of intracellular key enzymes in adaptive responses to endurance training.

show abstract

Carbohydrate restriction: Friend or foe of resistance-based exercise performance?

Cited by 23 publications

References 108 publications

Carbohydrate Availability and Physical Performance: Physiological Overview and Practical Recommendations

Carbohydrate Availability and Physical Performance: Physiological Overview and Practical Recommendations

Case Study: Body Composition Changes Resulting from a Nutritional Intervention on a Professional Vegan Powerlifter

Bases moleculares das estratégias de treinamento com baixa disponibilidade de carboidratos

Contact Info

Product

Resources

About