To determine the effects of deer antler velvet on maximal aerobic performance and the trainability of muscular strength and endurance, 38 active males were randomly assigned in a double-blind fashion to either deer antler velvet extract (n = 12), powder (n = 13), or placebo groups (n = 13). Subjects were tested prior to beginning supplementation and a 10-week strength program, and immediately post-training. All subjects were measured for circulating levels of testosterone, insulin-like growth factor, erythropoietin, red cell mass, plasma volume, and total blood volume. Additionally, muscular strength, endurance, and VO2max were determined. All groups improved 6 RM strength equivalently (41 +/- 26%, p < .001), but there was a greater increase in isokinetic knee extensor strength (30 +/- 21% vs. 13 +/- 15%, p = .04) and endurance (21 +/- 19% vs. 7 +/- 12%, p = .02) in the powder compared to placebo group. There were no endocrine, red cell mass or VO2max changes in any group. These findings do not support an erythropoetic or aerobic ergogenic effect of deer antler velvet. Further, the inconsistent findings regarding the effects of deer antler velvet powder supplementation on the development of strength suggests that further work is required to test the robustness of the observation that this supplement enhances the strength training response and to ensure this observation is not a type I error.

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A 2014 study published in Evidence Based Complimentary and Alternative Medicine tested whether or not deer antler extract would have an effect on fatigue in mice who were led to swim distances. The findings suggested that deer antler “might increase the muscle strength through the upregulation of genes responsible for muscle contraction and consequently exhibited the anti-fatigue effect in mice.” Deer antler seems to have a positive effect on genes involved in nine different signaling pathways that affect muscles, endurance and fatigue. These include GnRH signaling pathway and insulin signaling pathways, in addition to levels of troponins. (8) Deer antler may contribute to increases in muscle strength by increasing Tpm2 expression. This affects how muscles take up proteins and repair themselves. Other studies show some evidence that deer antler extract helps prevent muscle fatigue by activating the lactate dehydrogenase activities and reducing the levels of blood lactic acid and serum urea nitrogen.

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In another randomized, double blind, placebo controlled experiment (Broeder, 2004), 38 males, all of whom were experienced weightlifters, entered a 10 week strength training program. Those who took deer antler velvet experienced an increase in peak torque and average power relative to the placebo group. They also experienced unexpected improvements in aerobic performance.

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