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Table 9

Review of investigations of the effects of consumption of the soy-derived saccharides, dietary fibre and isoflavones on athlete health and endurance (in order of appearance in the text).

Aim of investigations Main results Author(s) and year
The effect of okara supplementation on fatigue and muscle damage over an exercise training season The results demonstrated significant differences in blood levels of ammonia, free fatty acids, creatine kinase, myoglobin, and aspartate transferase between baseline and exercise training. However, those increased markers of fatigue and muscle damage were significantly decreased after the okara supplementation Yang et al. (2015)
The effect of non-dairy chocolate beverage ingestion post glycogen-lowering exercise on performance during 20 km cycling time trial performance 4 hours later The intake of chocolate milk, chocolate soy beverage, chocolate hemp beverage, low fat milk and artificially sweetened, flavoured beverage enhanced similarly the time trial performance Upshaw et al. (2016)
The effect of simultaneous supplementation of 1.35 mg/day of vitamin K2 and 72 mg/day of soybean isoflavones for 30 days on bone metabolism in these athletes The supplementation of soy isoflavones in combination with vitamin K2 exhibited an inhibitory effect of bone resorption Sato et al. (2000)
To evaluate the relation between premenstrual syndrome (PMS) and equol production status in Japanese collegiate athletes The equol production enhanced by soybean consumption improve the athletic performance, while lack of equol production increase risk of premenstrual syndrome (PMS). The lack of equol production and restriction of body weight were shown to be significant risk factors for poor athletic performance Takeda et al. (2018)

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