More recent tests (Slievert, 2003) confirm deer antler velvet’s effects on muscle strength and endurance. In a randomized, double blind, placebo controlled experiment, 18 males entered a 10 week strength training program. Those who took deer antler velvet showed an increase in maximal aerobic capacity, an increase in strength in the bench press and leg squat, and decrease in body fat relative to the placebo group.
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A systemic review on human interventions makes note of a study conducted on patients of osteoarthritis (Edelman et al. 2000; cannot be located online) which found improvements in joint pain symptoms relative to baseline in the Velvet Antler group and not placebo, although a lack of information on blinding and randomization precludes results that can be drawn from this study.