Post-Resistance Exercise Ethanol Ingestion and Acute Testosterone Bioavailability.
ABSTRACT Alcohol (ethanol) and resistance exercise can independently affect circulating bioavailable testosterone concentration. PURPOSE: The purpose of this study was to examine the testosterone bioavailability and the anabolic endocrine milieu in response to acute ethanol ingestion following a bout of heavy resistance exercise. METHODS: Eight resistance trained men (mean ± SD: 25.3 ± 3.2 yrs, 87.7 ± 15.1 kg, 177 ± 7 cm) completed two identical acute heavy resistance exercise tests (AHRET: six sets of 10 repetitions of Smith machine squats) separated by 1 week. Post-AHRET participants consumed either 1.086 g of grain ethanol per kg lean mass (EtOH condition) or no ethanol (Placebo condition). Blood samples were collected immediately before exercise (PRE), immediately after exercise (IP), and every 20 min postexercise for 300 min. Samples following IP were pooled into phases (20-40 min, 60-120 min, and 140-300 min after exercise) and analyzed for total (TT) and free testosterone (FT), sex hormone binding globulin (SHBG), cortisol, and estradiol. RESULTS: Peak blood ethanol concentration (0.088 ± 0.015 g·dl) was achieved 60-90 min post-exercise. TT and FT was elevated significantly (p≤0.05) at IP for both conditions. At 140-300 min post-exercise TT, FT, and free androgen index were significantly higher for EtOH (TT: 22.5 ± 12.5 nmol·l ; FT: 40.5 ± 7.6 pmol·l) than for Placebo (TT: 13.9 ± 6.8 nmol·l; FT: 22.7 ± 10.0 pmol·l). No differences between conditions were noted for SHBG, Cortisol, or Estradiol. CONCLUSION: Post-exercise ethanol ingestion affects the hormonal milieu including testosterone concentration and bioavailability during recovery from resistance exercise.
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ABSTRACT: Alcohol is the most commonly used recreational drug globally and its consumption, often in large volume, is deeply embedded in many aspects of Western society. Indeed, athletes are not exempt from the influence alcohol has on society; they often consume greater volumes of alcohol through bingeing behaviour compared with the general population, yet it is often expected and recommended that athletes abstain from alcohol to avoid the negative impact this drug may have on recovery and sporting performance. While this recommendation may seem sensible, the impact alcohol has on recovery and sports performance is complicated and depends on many factors, including the timing of alcohol consumption post-exercise, recovery time required before recommencing training/competition, injury status and dose of alcohol being consumed. In general, acute alcohol consumption, at the levels often consumed by athletes, may negatively alter normal immunoendocrine function, blood flow and protein synthesis so that recovery from skeletal muscle injury may be impaired. Other factors related to recovery, such as rehydration and glycogen resynthesis, may be affected to a lesser extent. Those responsible for the wellbeing of athletes, including the athlete themselves, should carefully monitor habitual alcohol consumption so that the generic negative health and social outcomes associated with heavy alcohol use are avoided. Additionally, if athletes are to consume alcohol after sport/exercise, a dose of approximately 0.5 g/kg body weight is unlikely to impact most aspects of recovery and may therefore be recommended if alcohol is to be consumed during this period.Sports medicine (Auckland, N.Z.). 04/2014;
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ABSTRACT: Detrimental effects of acute and chronic alcohol (ethanol) consumption on human physiology are well documented in the literature. These adversely influence neural, metabolic, cardiovascular, and thermoregulatory functions. However, the side effects of ethanol consumption on hormonal fluctuations and subsequent related skeletal muscle alterations have received less attention and as such are not entirely understood. The focus of this review is to identify the side effects of ethanol consumption on the major hormones related to muscle metabolism and clarify how the hormonal profiles are altered by such consumption.Nutrition and metabolism 01/2014; 11:26.