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Consuming two medium-sized green kiwifruits an hour before bed can improve sleep quality and recovery stress balance among elite athletes.
2023 Nutrients The Impact of Kiwifruit Consumption on the Sleep and Recovery of Elite Athletes Doherty R, Madigan S, Nevill A, Warrington G, Ellis JG
Clinical Study Exercise Performance Kiwifruit Sleep
The study began with an initial assessment, after which all participants were instructed to consume two medium-sized green kiwifruits an hour before bedtime over a 4-week span. Data was collected through baseline and post-intervention questionnaires, as well as daily sleep diary entries throughout the study duration.
There was a notable positive effect of kiwifruit consumption on essential aspects of sleep and recovery in professional athletes. After the intervention period, improvements were observed in sleep quality and recovery stress balances. Additionally, there was an increase in total sleep time, sleep efficiency, and a decrease in the number of times participants woke after falling asleep. The study concludes that kiwifruits positively influence sleep and recovery in high-performing athletes.
Honey, comprising mainly carbohydrates, particularly fructose and glucose, demonstrates potential performance benefits and immunological advantages when consumed around exercise, suggesting a role in exercise nutrition.
2019 Nutrients Honey Supplementation and Exercise: A Systematic Review Hills , Mitchell , Wells , Russell
Review Article Exercise Performance Honey
This review assessed nine articles, extracted from 273 results of online database searches (PubMed, MEDLINE, SPORTDiscus), focusing on the effects of honey consumption combined with exercise in humans. Methodological variations existed across studies regarding exercise stimulus, population, and nutritional interventions. Studies reported biochemical variables, with four examining honey's impact on exercise performance and five on perceptual responses. Acute supplementation around a single exercise session showed comparable responses to other carbohydrate sources, with potential performance benefits observed relative to carbohydrate-free comparators. Prolonged honey consumption may mitigate exercise-induced immunological perturbations and enhance markers of bone formation.
The synthesis of diverse studies underscores honey's potential in exercise nutrition. Acute supplementation exhibited similarities in performance, perceptual, and immunological responses to other carbohydrates, with some advantages over carbohydrate-free comparators. Prolonged honey consumption showed promise in mitigating exercise-induced immunological disturbances and enhancing markers of bone formation. However, the review highlights the need for more well-controlled research to fully understand honey's role in a food-first approach to exercise nutrition.
Powdered tart cherry supplementation surrounding endurance exercise can decrease muscle damage markers, inflammation, oxidative stress and muscle soreness, while improving performance.
2016 Journal of the International Society of Sports Nutrition Effects of powdered Montmorency tart cherry supplementation on acute endurance exercise performance in aerobically trained individuals Levers K, Dalton R, Galvan E, O’Connor A, Goodenough C, Simbo S, et al.
Clinical Study Anti-Inflammatory Cherry Exercise Performance
In this study, 27 endurance-trained runners were matched based on their race pace, age, body mass, and fat-free mass. The runners were split into two groups in a double-blind manner: a placebo group given capsules containing 480 mg of rice flour and a tart cherries group given CherryPURE® capsules. These were ingested daily for 10 days, including on the day of the half-marathon and up to 48 hours post-race.
The results showed that runners given tart cherry supplementation completed their half-marathon faster (by 13%) than those given a placebo. Moreover, the tart cherry group had less muscle damage markers over time, a steady increase in antioxidant activity during recovery, 47% lower inflammatory markers, and a 34% lower pre-run soreness in the medial quadriceps compared to the placebo group. These results demonstrate the beneficial effects of tart cherry supplementation on performance and recovery in aerobically trained individuals.
Taking a powdered tart cherry supplement before and after intense resistance exercise can decrease muscle soreness, recovery strength loss, and signs of muscle damage.
2015 Journal of the International Society of Sports Nutrition Effects of powdered Montmorency tart cherry supplementation on an acute bout of intense lower body strength exercise in resistance trained males Levers K, Dalton R, Galvan E, Goodenough C, O’Connor A, Simbo S, et al.
Clinical Study Exercise Performance
In the methodology of this study, 23 healthy, resistance-trained men were chosen and paired based on relative maximal back squat strength, age, body weight, and fat-free mass. They were randomly assigned to ingest capsules containing either a placebo or powdered tart cherries for 10 days, including on the day of exercise as well as 48-hours post-exercise. The subjects performed ten sets of ten repetitions at 70% of a 1-RM back squat exercise. Fasting blood samples were taken along with isokinetic MVCs and quadriceps muscle soreness ratings before the exercise and at various intervals after the exercise.
In terms of the results, muscle soreness was found to be lower in the group that consumed the tart cherry supplement over the course of the exercise. Furthermore, this group showed lesser changes in serum levels of creatinine and total protein. However, no significant effects were observed for serum inflammatory or anti-inflammatory markers and no significant changes in free radical production, lipid peroxidation, or antioxidant capacity markers were seen amongst the group that took the tart cherry supplement. The group that took the supplement also showed greater changes in whole blood lymphocyte counts from before the exercise, but their lymphocyte counts returned faster to pre-exercise values compared to the placebo group.