pwo drink

[tiramisu]

I'm curious abouy the addition of glycerine/ol to my pwo drink while the insulin pump is on high.

30 grams dextrose, 40 grams protein from isolate, and 10 grams creatine.

My understanding is that glycerol in combination w/ lots of water has the ability to hyper hydrate the muscle. I know cyclists and ultra marathoners use this to increase endurance and fighters use it to rehydrate after making weight for a weight class.

I'm extremely curious if this might improve overall recovery or if there would be any negative impact in combination with insulin.

[JonnyO]

Take it before and after and add some salt.

[Timbo89]

Where can you buy glycerol?

[tiramisu]

Any drug store sells glycerol/ine.
Don't be entirely surprised if I am completely wrong about this.

My reading leads me to want to experiment but I've found nothing that says weight lifters will see positive benefit from this type of hydration. It may just turn me into the michelin man.

[nitrous]

a pro i know uses glycerol.. and he really knows his shit so my guess is it must work.. i'm planning on starting to use it but have not yet

[Avitoholis]

Anyone else have any thoughts/experience with the addition of Glycerol to their supplement regime?

[tex]

google!! 1st page....1st link....decent read.....

"A study carried out in 1990 investigated whether glycerol hyper-hydration altered sweating, regulation of body temperature and cardiovascular function during exercise in a hot environment (42°C and 25% relative humidity)(3). Six averagely fit people completed three 90- minute runs at around 60% of their VO2max after drinking either orange juice, diluted orange juice or glycerol solution.

After glycerol ingestion, subjects produced, on average, 500ml less urine and retained 700ml more total body water than those in the noglycerol groups. Glycerol-treated subjects also sweated more and had smaller increases in core temperature throughout the 90 minutes of exercise. However, the small sample size and the relatively low work rate used in the trial means its results should be interpreted with caution.

Two subsequent studies examined the effects of glycerol ingestion in 11 subjects of moderate-tohigh endurance fitness(6). Over a 90-minute period, the subjects consumed either a glycerol solution or a placebo drink; then, an hour later, they cycled at 74% of their VO2max until they could not maintain their pedalling cadence above 60rpm (revolutions per minute).

As expected, glycerol intake increased preexercise body water by 730ml and decreased excreted urine volume by 670ml. But, more importantly, subjects who had taken glycerol exercised significantly longer to fatigue, averaging around 94 minutes compared with just 73 minutes for those on placebo.

The researchers then went on to look at whether these positive effects were still evident when carbohydrate was ingested at the same time, as would be the case for most athletes during prolonged endurance events. Seven highly trained endurance athletes completed the same trial described above, but this time the subjects in both groups also consumed a 5% glucose solution at the rate of 3ml per kg of body weight every 20 minutes.

Analysis of the results showed that, while the glycerol solution still led to the retention of more body water, it was now just 100ml more than for those on placebo. Similarly, the difference in excreted urine volume was reduced to 92ml. Nevertheless, glycerol still prolonged the time taken to reach fatigue (123 minutes compared with 99 for those on placebo!).

Other studies have cast doubt on the efficacy of glycerol, with two subsequent investigations failing to find any significant benefits(4,7). However, both of these studies used very gentle exercise intensities (around 50% VO2max), which makes their results less relevant to athletes. An earlier study also showed no benefits, but as well as using a low exercise intensity (50% VO2max), this one also lacked a pre-exercise hyper-hydration procedure, which makes its results fairly meaningless(8).

On balance, this early research comes down firmly in favour of glycerol. More recent research, however, is rather less clear-cut. Benefits were observed in a study of six endurance-trained cyclists, who ingested either a glycerol solution or the same volume of placebo two hours before undertaking 90 minutes of steady state cycling at 98% of lactate threshold in dry heat (35°C, 30% relative humidity)(9). The cyclists were also allowed to ingest a carbohydrate drink (6% solution) at 15-minute intervals during the ride. Afterwards, they cycled for a further 15 minutes while their power outputs were assessed.

As expected, pre-exercise urine volume was lower when taking glycerol solution and heart rate was also significantly reduced. And, although the researchers failed to find any significant metabolic differences (such as lactate accumulation) between the glycerol and placebo groups, the work performed in the 15-minute assessment period was 5% higher in those taking glycerol.

Another, arguably more relevant, study on triathletes also found benefits with glycerol use(10). Seven male and three female triathletes completed two Olympic-distance triathlons two weeks apart, one on a hot day (30.5°C) and the other on a warm day (25° C). The triathletes were randomly assigned to consume either a glycerol solution or placebo, plus a carbohydrate solution in both cases , over a 60-minute period, two hours before each triathlon.

Although there were no significant differences in sweat loss between the glycerol and placebo conditions, glycerol-supplemented triathletes excreted a smaller volume of urine and subsequently retained more fluid than those on placebo.

More importantly, however, athletes on placebo performed significantly worse under hot conditions than those on glycerol by comparison with their performances under warm conditions. The average extra time taken by placebo triathletes in hot weather was 11 mins 40 secs, compared with just 1 min 47 secs extra for those on glycerol."

[Realist]

Agree with Johnny-O.

If you look at the ingredient list of almost any preworkout Volumizer, you will find some sort of glycerine product. Just depends on how well you know your organic chemistry.

It does super hydrate the muscle, so the added salt is needed for cellular functions.

Taking it before, prolongs your workout and increases intentsity.
Afterwards, it rehydrates the muscles, and "Fills" them, also making them look and feel fuller.
Use small doses only, lol!
Just go easy at first as it may cause some bowel discomfort (diarrhea).