Short term effects of a commercial post workout product, Adenoflex®, on hematocrit levels and muscular endurance

Methods Twelve recreationally active men, 28.5 ± 5 years of age and 197.1 ± 32.4 pounds body weight, took part in this double-blind, placebo-controlled trial on a volitional basis. Study participants were randomly assigned to receive either Adenoflex (AD) or Placebo (PL) for a 14 day period and were directed to take two servings per day for the first 8 days (immediately after training and five hours following) and one serving daily for the final 6 days (immediately after training). All participants completed a testing series prior to and following the supplementation period including measurement of hematocrit levels and upper extremity muscular endurance. Hematocrit was determined using standard procedures by centrifuging blood in a microhematocrit tube in a microhematocrit centrifuge. Muscular endurance was determined by performance of three sets of bench press and three sets of barbell curls with bodyweight and 1/3 bodyweight, respectively, with one minute recovery periods between sets. Work volume was calculated as repetitions completed times resistance utilized with work volume and reps completed examined per each set completed and as total values for bench press and barbell curls. Preand post-supplementation values of all variables were standardized into change scores relative to baseline values. Statistical analyses were conducted using one-way ANOVAs with the accepted level of significance set at p < 0.05.