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The effects of Montmorency tart cherry juice supplementation and FATMAX exercise on fat oxidation rates and cardio-metabolic markers in healthy humans

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Abstract

Montmorency tart cherries (Prunus cerasus L.) are rich in anthocyanins, compounds capable of augmenting fat oxidation and regulating metabolic dysfunction. The present study examined whether Montmorency tart cherry juice (MTCJ) supplementation could augment fat oxidation rates at rest and during FATMAX exercise, thus improve cardio-metabolic health. Eleven, healthy participants consumed MTCJ or placebo (PLA) twice daily, in a randomised, counterbalanced order for 20 days. Participants cycled at FATMAX for 1-h pre-, mid- (10 days) and post-supplementation whilst substrate oxidation rates were measured. Before exercise anthropometrics and resting metabolic rate were measured. Blood pressure, serum triglycerides, cholesterol, HDL, total antioxidant status (TAS) and glucose were measured immediately before and after exercise. No significant differences between conditions or interactions were observed for any functional and blood-based cardio-metabolic markers or fat oxidation during exercise or rest (P > 0.05). Pre-exercise TAS (P = 0.036) and HDL (P = 0.001) were significantly reduced from mid- to post-supplementation with MTCJ only. Twenty days’ MTCJ supplementation had no effect on fat oxidation; therefore, it is unnecessary for individuals in this participant cohort to consume MTCJ with exercise to improve cardio-metabolic biomarkers.

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Abbreviations

BP:

Blood pressure

CHO:

Carbohydrate

CRM:

Calorie restrictive mimetic

DBP:

Diastolic blood pressure

EE:

Energy expenditure

HR:

Heart rate

MFO:

Maximal fat oxidation

MTCJ:

Montmorency tart cherry juice

NZBE:

New Zealand blackcurrant extract

PLA:

Placebo

PVC:

Plasma volume change

PPAR:

Peroxisome proliferator-activated receptor

RER:

Respiratory exchange ratio

RMR:

Resting metabolic rate

RPE:

Ratings of perceived exertion

SBP:

Systolic blood pressure

TAS:

Total antioxidant status

\(\dot {V}{O_2}\hbox{max}\) :

Volume of maximal oxygen uptake

\(\dot {V}C{O_2}\) :

Volume of carbon dioxide production

\(\dot {V}{O_2}\) :

Volume of oxygen uptake

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Acknowledgements

The authors would like to thank the participants for partaking in the study and to Camilla Holland and Neil Willmore for technical assistance. The authors would like to acknowledge the Cherry Marketing Institute for providing the tart cherry concentrate. This research was funded by the University of Hertfordshire Diamond Fund.

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Authors

Contributions

TD, LB and MR conceived and designed the experiments; TD performed the experiments; TD, LB and MR analysed the data; TD, LB and MR wrote the paper.

Corresponding author

Correspondence to Terun Desai.

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Conflict of interest

The authors declare that they have no conflict of interest.

Additional information

Communicated by Phillip D Chilibeck.

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Desai, T., Bottoms, L. & Roberts, M. The effects of Montmorency tart cherry juice supplementation and FATMAX exercise on fat oxidation rates and cardio-metabolic markers in healthy humans. Eur J Appl Physiol 118, 2523–2539 (2018). https://doi.org/10.1007/s00421-018-3978-9

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  • DOI: https://doi.org/10.1007/s00421-018-3978-9

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