There haven’t been many studies investigating the ergogenic effects of tongkat ali. A pilot study (presented as a conference abstract) in men who supplemented with 100 mg of tongkat ali during a 5-week circuit training intervention (60% 1-repetition max for 2 sets of 10 reps, 10 stations total, 1-minute rest intervals) noted that they experienced greater improvements in strength and lean body mass compared to a control group who trained without tongkat ali.[1]
Five weeks of tongkat ali supplementation (400 mg/day of extract) improved handgrip strength in older men and women between the ages of 57 and 72.[2] However, another study, which combined tongkat ali (200 mg/day) with a resistance training program, found no advantage compared to resistance training alone for muscular strength and power, although peak power output during a cycling test increased only in the combined group.[3] In the same study, tongkat ali supplementation alone did not affect performance outcomes.
In men with androgen deficiency of aging male (ADAM), 200 mg of tongkat ali with or without concurrent training for 6 months didn’t seem to provide an additional benefit above concurrent training alone for muscle strength, cardiorespiratory fitness, or symptoms of androgen deficiency in men;[4] or erectile function, sexual satisfaction, and testosterone levels.[5]
Tongkat ali doesn’t seem to improve endurance performance in the heat in recreational runners. Taking 150 mg of Eurycoma daily for 7 days and 1 hour before a time trial had no effect on running economy and performance or body temperature, heart rate, blood glucose, or lipid responses to exercise.[6]
References
- ^MedicineThe Ergogenic Effects of Eurycoma Longifolia Jack: a Pilot Study (Joint Conference of BASEM and BASES)British Journal of Sports Medicine.(2003-10-01)
- ^Henkel RR, Wang R, Bassett SH, Chen T, Liu N, Zhu Y, Tambi MITongkat Ali as a potential herbal supplement for physically active male and female seniors--a pilot study.Phytother Res.(2014-Apr)
- ^Chen CK, Ooi FK, Abu Kasim NA, Asari MAEffects of Jack Supplementation Combined with Resistance Training on Isokinetic Muscular Strength and Power, Anaerobic Power, and Urinary Testosterone: Epitestosterone Ratio in Young Males.Int J Prev Med.(2019)
- ^Alice Erwig Leitão, Melissa de Carvalho Souza Vieira, Diogo Almeida Gomes, Leonessa Boing, Andreia Pelegrini, Edson Luiz, Adriana Coutinho de Azevedo GuimarãesExercise associated or not to the intake of Eurycoma longifolia improves strength and cardiorespiratory fitness in men with androgen deficiencyComplement Ther Clin Pract.(2021 Feb)
- ^Alice Erwig Leitão, Melissa Carvalho de Souza Vieira, Andreia Pelegrini, Edson Luiz da Silva, Adriana Coutinho de Azevedo GuimarãesA 6-month, double-blind, placebo-controlled, randomized trial to evaluate the effect of Eurycoma longifolia (Tongkat Ali) and concurrent training on erectile function and testosterone levels in androgen deficiency of aging males (ADAM)Maturitas.(2021 Mar)
- ^Effects of Eurycoma longifolia Jack Supplementation on Recreational Athletes’ Endurance Running Capacity and Physiological Responses in the Heat