Evidence map›Paper›PMID 24860277›Full record

ArticleJournal of the International Society of Sports Nutrition2014

The effect of almond consumption on elements of endurance exercise performance in trained athletes.

Muqing Yi, Jinde Fu, Lili Zhou, Hong Gao, Chenguang Fan, Jing Shao, Baohua Xu, Qirong Wang, Juntao Li, Guangwei Huang and 3 more

Abstract read
In one paragraph

Article in Journal of the International Society of Sports Nutrition, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Antioxidants and Exercise Performance: With a Focus on Vitamin E and C Supplementation.International journal of environmental research and public health · 2020
    Review
  6. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors.

Muqing YiCenter for Sports Nutrition, National Institute of Sports Medicine, 1st Anding Road, Chaoyang District, Beijing 100029, China.
Jinde FuCenter for Sports Nutrition, National Institute of Sports Medicine, 1st Anding Road, Chaoyang District, Beijing 100029, China.
Lili ZhouCenter for Sports Nutrition, National Institute of Sports Medicine, 1st Anding Road, Chaoyang District, Beijing 100029, China.
Hong GaoCenter for Sports Nutrition, National Institute of Sports Medicine, 1st Anding Road, Chaoyang District, Beijing 100029, China.
Chenguang FanChinese Baiyi Cycling Team, Fengtai District, Beijing 100072, China.
Jing ShaoCenter for Sports Nutrition, National Institute of Sports Medicine, 1st Anding Road, Chaoyang District, Beijing 100029, China.
Baohua XuCenter for Sports Nutrition, National Institute of Sports Medicine, 1st Anding Road, Chaoyang District, Beijing 100029, China.
Qirong WangCenter for Sports Nutrition, National Institute of Sports Medicine, 1st Anding Road, Chaoyang District, Beijing 100029, China.
Juntao LiCenter for Sports Nutrition, National Institute of Sports Medicine, 1st Anding Road, Chaoyang District, Beijing 100029, China.
Guangwei HuangAlmond Board of California, Modesto, CA 95354, USA.
Karen LapsleyAlmond Board of California, Modesto, CA 95354, USA.
Jeffrey B BlumbergAntioxidants Research Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA.
C-Y Oliver ChenAntioxidants Research Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAlmonds are a healthy tree nut food with high nutrient density. Their consumption has been shown to ameliorate oxidative stress, inflammation, etc. The objective of the study was to examine the effect of almonds on elements of endurance exercise performance in trained athletes.

methodsA 10-week crossover, placebo controlled study was conducted. Eight trained male cyclists and two triathletes were randomly assigned to consume 75 g/d whole almonds (ALM) or isocaloric cookies (COK) with equal subject number. They consumed the assigned food for 4 wks and then the alternate food for another 4 wks. They underwent 3 performance tests including 125-min steady status exercise (SS) and 20-min time trial (TT) on an indoor stationary trainer at the start of the study (BL) and at the end of each intervention phase. Venous blood was collected in the morning prior to the performance test for biochemical measurements and finger blood during the test for glucose determination. Carbohydrate and fat oxidation, energy expenditure, and oxygen use were calculated using respiratory gas analysis.

resultsALM increased cycling distance during TT by 1.7 km as compared BL (21.9 vs. 20.2 km, P = 0.053) and COK increased 0.6 km (20.8 vs. 20.2 km, P > 0.05). ALM, but not COK, led to higher CHO and lower fat oxidation and less oxygen consumption during TT than BL (P < 0.05), whereas there was no significant difference in heart rate among BL, ALM and COK. ALM maintained higher blood glucose level after TT than COK (P < 0.05). ALM had higher vitamin E and haemoglobin and lower serum free fatty acid (P < 0.05), slightly elevated serum arginine and nitric oxide and plasma insulin (P > 0.05) than BL, and a higher total antioxidant capacity than COK (P < 0.05).

conclusionsWhole almonds improved cycling distance and the elements related to endurance performance more than isocaloric cookies in trained athletes as some nutrients in almonds may contribute to CHO reservation and utilization and effective oxygen utilization. The results suggest that almonds can be incorporated into diets of those who undertake exercise training for performance improvement.

Indexed as

AlmondsAntioxidant defense capacityExercise performanceSubstrate oxidation

Identifiers

PMID24860277
PMCPMC4031978

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.