anyone have any experience in using glycerol to enhance their workouts and for producing better pumps. anyone have any thougths on this?
here's an article i found on the subject.
Description
Glycerol is a liquid alcohol most commonly found in the diet as a component of fat or triglycerides. The glycerol serves as the backbone onto which fatty acid molecules are attached. Commercial preparation of glycerol can be obtained by hydrolysis (removal) of the fatty acids from the glycerol molecule.
Claims
Increase blood volume
Enhanced temperature regulation
Improved exercise performance in the heat
Theory
Glycerol is proposed to help "hyperhydrate" the body by increasing blood volume levels and helping to delay dehydration.
Scientific Support
At least a few studies support the theory that glycerol added to fluids will increase the hydration compared to drinking fluid alone (without glycerol added). Following glycerol consumption, heart rate and body core temperature are lower during exercise in the heat, suggesting an ergogenic (performance enhancing) effect. In long duration activities, a larger supply of stored water may lead to a delay in dehydration and exhaustion.
Safety
Straight (undiluted) glycerin is not recommended for internal consumption, but no significant adverse side effects are associated with glycerin diluted with fluids (as noted above). In some subjects, glycerol consumption may lead to headaches or nausea. Individuals in whom increased blood volume may be undesirable, including conditions such as pregnancy, high blood pressure, diabetes and kidney disease, should avoid glycerol supplementation.
Value For endurance athletes engaged in strenuous training or competition in hot environments, consumption of glycerol containing beverages may help hydrate tissues, increase blood volume and delay fatigue and exhaustion associated with dehydration.
Dosage Glycerol dosage relates to the amount of total body water – so bigger people have more body water and require more glycerol to obtain an effect. Approximately 1 gram of glycerin per kilogram (2.2 lbs) of body weight is diluted in 20-25 milliliters of liquid. A 70 kg man (154 lbs), therefore, would need 70 grams of glycerin diluted in 1400-1750 ml of fluid (about 1-2 liters of fluid). The mixture should be consumed slowly over the course of 1-2 hours prior to exercise in the heat.
References 1. Arnall DA, Goforth HW Jr. Failure to reduce body water loss in cold-water immersion by glycerol ingestion. Undersea Hyperb Med. 1993 Dec;20(4):309-20. 2. Boulay MR, Song TM, Serresse O, Theriault G, Simoneau JA, Bouchard C. Changes in plasma electrolytes and muscle substrates during short-term maximal exercise in humans. Can J Appl Physiol. 1995 Mar;20(1):89-101. 3. Inder WJ, Swanney MP, Donald RA, Prickett TC, Hellemans J. The effect of glycerol and desmopressin on exercise performance and hydration in triathletes. Med Sci Sports Exerc. 1998 Aug;30(8):1263-9. 4. Jimenez C, Melin B, Koulmann N, Allevard AM, Launay JC, Savourey G. Plasma volume changes during and after acute variations of body hydration level in humans. Eur J Appl Physiol Occup Physiol. 1999 Jun;80(1):1-8. 5. Meyer LG, Horrigan DJ Jr, Lotz WG. Effects of three hydration beverages on exercise performance during 60 hours of heat exposure. Aviat Space Environ Med. 1995 Nov;66(11):1052-7. 6. Mitchell JB, Braun WA, Pizza FX, Forrest M. Pre-exercise carbohydrate and fluid ingestion: influence of glycemic response on 10-km treadmill running performance in the heat. J Sports Med Phys Fitness. 2000 Mar;40(1):41-50. 7. Montner P, Stark DM, Riedesel ML, Murata G, Robergs R, Timms M, Chick TW. Pre-exercise glycerol hydration improves cycling endurance time. Int J Sports Med. 1996 Jan;17(1):27-33. 8. Wagner DR. Hyperhydrating with glycerol: implications for athletic performance. J Am Diet Assoc. 1999 Feb;99(2):207-12.
here's an article i found on the subject.
Description
Glycerol is a liquid alcohol most commonly found in the diet as a component of fat or triglycerides. The glycerol serves as the backbone onto which fatty acid molecules are attached. Commercial preparation of glycerol can be obtained by hydrolysis (removal) of the fatty acids from the glycerol molecule.
Claims
Increase blood volume
Enhanced temperature regulation
Improved exercise performance in the heat
Theory
Glycerol is proposed to help "hyperhydrate" the body by increasing blood volume levels and helping to delay dehydration.
Scientific Support
At least a few studies support the theory that glycerol added to fluids will increase the hydration compared to drinking fluid alone (without glycerol added). Following glycerol consumption, heart rate and body core temperature are lower during exercise in the heat, suggesting an ergogenic (performance enhancing) effect. In long duration activities, a larger supply of stored water may lead to a delay in dehydration and exhaustion.
Safety
Straight (undiluted) glycerin is not recommended for internal consumption, but no significant adverse side effects are associated with glycerin diluted with fluids (as noted above). In some subjects, glycerol consumption may lead to headaches or nausea. Individuals in whom increased blood volume may be undesirable, including conditions such as pregnancy, high blood pressure, diabetes and kidney disease, should avoid glycerol supplementation.
Value For endurance athletes engaged in strenuous training or competition in hot environments, consumption of glycerol containing beverages may help hydrate tissues, increase blood volume and delay fatigue and exhaustion associated with dehydration.
Dosage Glycerol dosage relates to the amount of total body water – so bigger people have more body water and require more glycerol to obtain an effect. Approximately 1 gram of glycerin per kilogram (2.2 lbs) of body weight is diluted in 20-25 milliliters of liquid. A 70 kg man (154 lbs), therefore, would need 70 grams of glycerin diluted in 1400-1750 ml of fluid (about 1-2 liters of fluid). The mixture should be consumed slowly over the course of 1-2 hours prior to exercise in the heat.
References 1. Arnall DA, Goforth HW Jr. Failure to reduce body water loss in cold-water immersion by glycerol ingestion. Undersea Hyperb Med. 1993 Dec;20(4):309-20. 2. Boulay MR, Song TM, Serresse O, Theriault G, Simoneau JA, Bouchard C. Changes in plasma electrolytes and muscle substrates during short-term maximal exercise in humans. Can J Appl Physiol. 1995 Mar;20(1):89-101. 3. Inder WJ, Swanney MP, Donald RA, Prickett TC, Hellemans J. The effect of glycerol and desmopressin on exercise performance and hydration in triathletes. Med Sci Sports Exerc. 1998 Aug;30(8):1263-9. 4. Jimenez C, Melin B, Koulmann N, Allevard AM, Launay JC, Savourey G. Plasma volume changes during and after acute variations of body hydration level in humans. Eur J Appl Physiol Occup Physiol. 1999 Jun;80(1):1-8. 5. Meyer LG, Horrigan DJ Jr, Lotz WG. Effects of three hydration beverages on exercise performance during 60 hours of heat exposure. Aviat Space Environ Med. 1995 Nov;66(11):1052-7. 6. Mitchell JB, Braun WA, Pizza FX, Forrest M. Pre-exercise carbohydrate and fluid ingestion: influence of glycemic response on 10-km treadmill running performance in the heat. J Sports Med Phys Fitness. 2000 Mar;40(1):41-50. 7. Montner P, Stark DM, Riedesel ML, Murata G, Robergs R, Timms M, Chick TW. Pre-exercise glycerol hydration improves cycling endurance time. Int J Sports Med. 1996 Jan;17(1):27-33. 8. Wagner DR. Hyperhydrating with glycerol: implications for athletic performance. J Am Diet Assoc. 1999 Feb;99(2):207-12.