Effects of maca extract on exercise endurance and blood hormone levels in the rats
Received:April 03, 2017  
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DOI:10.3969/j.issn.1005-4847.2017.05.016
KeyWord:Maca extract;Endurance;Blood noradrenaline;blood estradiol;blood testosterone;Rats
                    
AuthorInstitution
俞发荣 甘肃省证据科学技术研究与应用重点实验室 甘肃政法学院,兰州
陈望军 甘肃省证据科学技术研究与应用重点实验室 甘肃政法学院,兰州
谢明仁 甘肃省证据科学技术研究与应用重点实验室 甘肃政法学院,兰州
连秀珍 甘肃省证据科学技术研究与应用重点实验室 甘肃政法学院,兰州
李登楼 甘肃省证据科学技术研究与应用重点实验室 甘肃政法学院,兰州
郭蕴萱 甘肃省证据科学技术研究与应用重点实验室 甘肃政法学院,兰州
杨博 甘肃省证据科学技术研究与应用重点实验室 甘肃政法学院,兰州
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Abstract:
      Objective To study the effects of maca extract on exercise endurance and blood hormone levels in the rats. Methods Wistar rats treated with maca extract (2.0, 4.0, 8.0 g/kg body weight) were freely swimming in the circulating water flow daily for 15 days. On the 16th day of experiment, the exercise endurance and blood noradrenaline (NA), estradiol (E2), and testosterone (T) levels of the rats were determined.Results The rats administered with maca extract at the doses of 2.0, 4.0, 8.0 g/kg body weight for 15 d showed that the swimming time before sinking was increased by 32.51%, 60.04%, 106.52%, the total swimming time was extended by 16.99%, 56.50%, and 101.73% respectively (P<0.01); while the number of sinking was decreased by 18.89%, 35.89%, and 58.06%, respectively (P< 0.01), compared with those swimming rats without maca extract treatment. The noradrenaline level in the blood of rats treated with maca extract 2.0, 4.0, 8.0 g/kg body weight was increased by 3.30%, 6.60%, and 16.50%, respectively, compared with the control group, and increased by 42.49%,47.05%, and 60.70%, respectively, compared with the swimming rats without extract treatment; the E2 level was increased by 132.83%,102.72%, and 62.26% (P<0.01)respectively, compared with the control group, while decreased by 23.88%, 33.72%, and 46.95% (P<0.01) respectively, compared with the swimming rats without extract treatment. The blood testosterone level was increased by 5.11%, 37.65%, and 123.16% (P<0.01) respectively, compared with the control group, and increased by 28.98%, 68.92%, and 173.85%, (P<0.01) respectively, compared with the swimming rats without extract treatment.Conclusions The results of this study demonstrate that maca extract has effect to resist fatigue and enhance exercise capacity in rats. The mechanism is associated with reduced blood E2, and increased noradrenaline and testosterone levels in the blood of rats.
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