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Table 7

Review of investigations of the effects of the soy protein-rich food consumption on athlete health and endurance (in order of appearance in the text).

Aim of investigations Main results Author(s) and year
The recovery effect of soybean peptide solid beverage on athletes in endurance events The intake of soybean polypeptide (i) promotes the increase of serum testosterone and lean mass weight, (ii) cuts down the serum creatine kinase for middle-distance runners Jiang (2015)
The effects of consumption of isolated soy protein on exercise induced muscle damage (EIMD) in athletic population Biochemical markers of inflammation, muscle damage, and oxidative stress, demonstrated an increase in the mean values following EIMD both before and after supplementation, whereas the degree of increase is less following soy consumption Shenoy et al. (2016)
The effect of soybean peptide on muscle damage index and testosterone and cortisol concentration The intake of soybean peptide resulted in: (i) lowering level of creatine phosphokinase, lactate dehydrogenase, aldolase, as well as concentration of plasma cortisol, (ii) not significant increase of concentration of plasma testosterone Son et al. (2011)
The biological effects of daily consumption of soybean peptides The intake of soybean peptides resulted in: (i) an increase in body weight, especially in lean body mass and cyclic total testosterone level, (ii) a decrease level in serum creatine kinase Wang et al. (2004)
The biological effects of Supro isolated soy protein supply The soy protein supply induced increased of body mass (especially by lean body mass), strength indexes, serum proteins, haemoglobin and total calcium and significant decreases of urinary mucoproteins and fatigue after training sessions Drăgan et al. (1992)
The effect of supplementation with SUPRO Brand Isolated Soy Protein on the metabolic and hormonal response in elite female gymnasts undergoing strenuous training The intake of soy proteins resulted in increase in lean body mass and serum levels of prolactin and a decrease in serum alkaline phosphatase Stroescu et al., 2001
The effect of sports nutrition on exercise capacity The intake of soybean peptides energy drinks contributed to elimination of fatigue and covering the distance in shorter time Xiaolu (2013)
The effects of protein supplementation on adaptation process to increased demands of training The supplementation of a normal diet with soy protein improved the aerobic and anaerobic performance Laskowski & Antosiewicz (2003)
The effects of a proprietary blend of soybean peptides, taurine, Pueraria isoflavone, and ginseng saponin complex (STPG capsule) on exercise performance in humans The intake of STPG capsules was effective in promoting utilization of free fatty acids and improving exhaustive cycling test performance Yeh et al. (2011)
The effect of soy protein supplementation on the changes in endurance capacity as well as in metabolic, hormonal and inflammatory markers induced by endurance training The soy protein supplementation improved running performance and aerobic energy supply and metabolic function in healthy sports students Berg et al. (2012)
The effect of soybean peptide on antioxidant enzymes, cortisol hormone and inflammatory cytokine levels The soy protein supplementation increased the antioxidant status and decreases the level of plasma cortisol, tumor necrosis factor-alpha and interleukin Bae et al., 2012
The characteristics of plasma amino acid (AA) responses to the intake of proteins at rest and after exercise Completing exercise before ingesting protein sources did not cause statistically significant changes in the pattern of delivery of amino acids and leucine Burke et al. (2012)
The assessment of the effects of soy and whey protein supplementation on sex hormones following heavy resistance exercise in resistance trained men The findings demonstrated that 14 days of supplementation with soy protein influences the weaker increase of cortisol following resistance exercise Kraemer et al., 2013
The effect of the developed drinking cereal power on the blood profile of young athletes The eight weeks supplementation of multi grain drinking powder resulted in the increase of haemoglobin and blood glucose level Malik & Parvinder (2018)
The effect of a combination of tryptophan-rich breakfast and light with low colour-temperature at night on enhanced melatonin secretion and earlier sleep There was a significantly positive correlation between total hours the participants spent under incandescent light at night and the frequency of feeling sleepy. The salivary melatonin concentration in people eating protein-rich food containing soybeans and vitamin B6-rich foods such as bananas was higher than in control group Wada et al. (2013)
The comparison of antioxidant activity of hydrolysates of chosen enzymes using soybean protein as substrate The hydrolysates of bromelain, neutral protease and alkaline protease have stronger reducing capacity as well as ability of eliminating superoxide anion free radicals and hydrogen peroxide than others Lai (2015)

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