<p>VO<sub>2</sub>peak is a key health benefit of aerobic exercise; however, chronic hyperglycemia is associated with persistently low VO<sub>2</sub>peak due to an impaired adaptive response to training. Here, we show that reducing blood glucose with a carbohydrate-restricted, high fat ketogenic diet can restore aerobic exercise adaptation in male mice with hyperglycemia. Hyperglycemic mice received standard high-carbohydrate chow (CHOW), which sustains high blood glucose; or a ketogenic diet (KETO), which normalizes blood glucose levels. After aerobic exercise training, improvements in VO<sub>2</sub>peak are blunted in CHOW, but restored by KETO. Increased VO<sub>2</sub>peak in KETO is associated with enhanced aerobic remodeling of skeletal muscle, including a more oxidative fiber-type and increased capillary density. Moreover, KETO induces exercise-independent effects on muscle mitochondrial remodeling and substrate selection, significantly increasing fatty acid oxidation and down-regulating glucose metabolism. We identify a ketogenic diet as a potential therapy to improve aerobic exercise adaptation in the growing population with hyperglycemia.</p>

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A ketogenic diet enhances aerobic exercise adaptation and promotes muscle mitochondrial remodeling in hyperglycemic male mice

  • Pattarawan Pattamaprapanont,
  • Roberto C. Nava,
  • Rea Grover,
  • Mia Formato,
  • Eileen M. Cooney,
  • Ana Paula Pinto,
  • Ana B. Alves-Wagner,
  • Anamica Das,
  • Yuntian Guan,
  • Meghana Annambhotla,
  • Saanvi Acharya,
  • Donato A. Rivas,
  • Sarah J. Lessard

摘要

VO2peak is a key health benefit of aerobic exercise; however, chronic hyperglycemia is associated with persistently low VO2peak due to an impaired adaptive response to training. Here, we show that reducing blood glucose with a carbohydrate-restricted, high fat ketogenic diet can restore aerobic exercise adaptation in male mice with hyperglycemia. Hyperglycemic mice received standard high-carbohydrate chow (CHOW), which sustains high blood glucose; or a ketogenic diet (KETO), which normalizes blood glucose levels. After aerobic exercise training, improvements in VO2peak are blunted in CHOW, but restored by KETO. Increased VO2peak in KETO is associated with enhanced aerobic remodeling of skeletal muscle, including a more oxidative fiber-type and increased capillary density. Moreover, KETO induces exercise-independent effects on muscle mitochondrial remodeling and substrate selection, significantly increasing fatty acid oxidation and down-regulating glucose metabolism. We identify a ketogenic diet as a potential therapy to improve aerobic exercise adaptation in the growing population with hyperglycemia.