Tuesday, 18 December 2018 19:08


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Caffeine is sometimes called “the world’s most popular drug”.
It’s a very common naturally-occurring stimulant found in coffee and other foods/drinks. 
Its main effect is on the brain, helping to increase alertness and reducing fatigue. It’s also used for fat loss and in sports training.
And it is safe and effective for these purposes...to a certain extent.
Let’s hash out the details of the benefits (and risks) of caffeine for sports training. We’ll also  touch on caffeine supplements, coffee, and energy drinks. As well as the use of caffeine along with  ephedrine.
Caffeine is the most widely used stimulant in the world. About 80% of the world drinks a caffeinated beverage every day, mostly as tea or coffee. In fact, it’s a natural compound that has been used for thousands of years.
Caffeine reduces fatigue, and enhances mental alertness and concentration. And it can also improve physical endurance.
Caffeine is found in coffee, tea, chocolate, soft drinks, and energy drinks. It is also added to some medications and supplements.
Caffeine supplements are approved in Canada to:
Helps (temporarily) to:
promote alertness and wakefulness,
enhance cognitive performance,
relieve fatigue, 
promote endurance,
enhance motor performance.
Used (temporarily) as a mild diuretic.
These are at doses of 100-200 mg every 3-4 hours as needed. And these doses have shown benefits for sports training. 
Caffeine has several uses in sports training. It has been shown to reduce fatigue and increase power output (i.e. for weight training). It can also increase training volume (the overall work performed during a workout). 
A strong study (meta-analysis of 40 double-blind placebo-controlled studies) looked at the effects of caffeine on three kinds of exercise: endurance, graded, and short-term. The results showed that caffeine improves endurance exercise the most. Caffeine delayed the time-to-exhaustion.
Most of the endurance studies looked at running, cycling and cross-country skiing.
The average improvement for endurance has been shown to be 3.2%, up to 4.9%. 
In terms of sustained high-intensity exercise (i.e. 1-20 min running, cycling, swimming, and rowing), caffeine helps to improve these as well.
But what about hydration?
In terms of hydration, studies show that ergogenic (enhancing physical performance) doses of caffeine don’t dehydrate. It doesn't change sweat rates, urine losses, or other indicators of hydration. 
This means that you don’t need to drink more fluids because of your caffeine intake.
When should I take it?
It seems that the ideal time to take caffeine is about one hour before you need it. It has also been effective when used during exercise, or after the onset of fatigue. The exercise benefits can last for several hours after caffeine is ingested. 
Caffeine’s effect is greater if you avoid it for at least 7 days beforehand.
How much should I take?
Taking doses much more than recommended doesn’t seem to further improve performance. Higher doses may also start to impair performance, along with the usual jitters and increased heart rate.
Of course, coffee is only about 2% caffeine, and has many other compounds in it. One 150 mL cup of coffee can have between 40-180 mg of caffeine, while the same amount of tea can have 24-50 mg. Soda pop has even less, and cocoa products even less than that.
Many studies have had mixed results when it comes to coffee’s effects on exercise performance. However, a study published in 2013 showed that a cup of caffeinated coffee had the same effect on cyclists as a caffeine supplement did. And both of these caffeine sources worked better than either the decaf coffee or placebo.
What about energy drinks?
Along with vitamins, minerals and carbs, taurine is also added to caffeine-containing energy drinks. Taurine is an amino acid (from protein) that is naturally found in the body. It is thought to have anti-inflammatory and antioxidant properties. It’s added to these drinks to help improve cognitive and physical performance, but there is little research on this.
However, a more recently published (February 2017) review of 34 studies looked at the effect of energy drinks on sports performance. It showed improvements in muscle strength, endurance, jumping, and sport-specific actions (but not sprinting). The results of this study concluded that these benefits were from the taurine in those drinks, and not the caffeine. The people in these studies were young and trained, so it is not known if or how this may apply to people who are older or less fit.
Caffeine and ephedrine (one of the active components of the herb “ephedra”) seem to be synergistic when it comes to appetite suppression and fat burning. This means that there is more fat burned when the two compounds are taken together, than what is expected based on either compound taken alone.
While ephedrine supplements are approved for use in Canada for nasal decongestion, they come with a whole host of cautions, warnings, and contraindications.
One warning in particular is with its use with caffeine: “Consult a healthcare practitioner prior to use if you are taking other products which contain caffeine.”
Ephedrine availability is also tightly controlled, as it is used as a precursor for illicit drugs, namely methamphetamine. Ephedrine is also banned by certain sports agencies.
I strongly advise to review all the warnings, and only take the ephedrine under medical supervision.
Caffeine is widely consumed around the world, mostly in drinks. It is generally recognized to be safe. High doses (400 mg) have been related to side effects such as increased blood pressure, anxiety, heart palpitations, headache and dizziness.
Caffeine supplements approved in Canada come with the following warnings:
Consult a health care practitioner prior to use if you are taking lithium, if you have high blood pressure, glaucoma, and/or detrusor instability (overactive bladder syndrome).
Consumption with natural health products (e.g. bitter orange extract, synephrine, octopamine, ephedra) or other drugs (e.g. ephedrine) which increase blood pressure is not recommended.
Consumption with other caffeine-containing products (e.g. medications, coffee, tea, colas, cocoa, guarana, maté) is not recommended.
This product is not intended as a substitute for sleep.
For doses greater than 300 Milligrams per day: Consult a health care practitioner if you are of childbearing age, pregnant or breastfeeding.
For doses greater than 600 Milligrams per day: Caffeine may cause anxiety, tachycardia (rapid heart rate), palpitations, insomnia, restlessness, nervousness, tremor and headache.
Hypersensitivity/allergy is known to occur, in which case, discontinue use.
Caffeine is a natural stimulant, and is “the world’s most popular drug”.
It’s in coffee, tea, chocolate, energy drinks, and some supplements and medications.
Doses of 100-200 mg help to improve thinking, fight fatigue, and promote endurance and performance.
Studies show that endurance can be improved up to 5% with caffeine.
The best time to take caffeine is about one hour before you need it.
Coffee may have the same effect as supplements.
Energy drinks with taurine may help sports performance.
Taking caffeine with ephedrine can be dangerous.
Caffeine can have side effects such as increased blood pressure, anxiety, and insomnia. It may also interact with some medications and medical conditions.
Burke, L.M. (2009). Caffeine and sport performance. Applied Physiology Nutrition and Metabolism 33(6):1319-34. DOI: 10.1139/H08-130 
Caine, J.J. & Geracioti, T.D. (2016). Taurine, energy drinks, and neuroendocrine effects. Cleve Clin J Med. 83(12):895-904. doi: 10.3949/ccjm.83a15050.
LINK:  http://www.mdedge.com/ccjm/article/120413/adolescent-medicine/taurine-energy-drinks-and-neuroendocrine-effects
Doherty, M. & Smith, P.M. (2004). Effects of caffeine ingestion on exercise testing: a meta-analysis. Int J Sport Nutr Exerc Metab. 14(6):626-46.
LINK:  https://www.ncbi.nlm.nih.gov/pubmed/15657469/
Examine.com, Supplements, Caffeine. Accessed March 11, 2017.
Examine.com, Supplements, Ephedrine. Accessed March 11, 2017.
Ganio, M.S., Klau, J.F., Casa, D.J., Armstrong, L.E. & Maresh, C.M. (2009). Effect of caffeine on sport-specific endurance performance: a systematic review. J Strength Cond Res. 23(1):315-24. doi: 10.1519/JSC.0b013e31818b979a.
LINK:  https://www.ncbi.nlm.nih.gov/pubmed/19077738
Health Canada, Natural Health Products Ingredients Database, Caffeine. Accessed March 9, 2017.
Health Canada, Natural Health Products Ingredients Database, Ephedrine. Accessed March 11, 2017.
Heckman, M. A., Weil, J. & De Mejia, E. G. (2010), Caffeine (1,3,7-trimethylxanthine) in Foods: A Comprehensive Review on Consumption, Functionality, Safety, and Regulatory Matters. Journal of Food Science, 75: R77–R87. doi:10.1111/j.1750-3841.2010.01561.x
Hodgson, A.B., Randell, R.K. & Jeukendrup, A.E. (2013). The metabolic and performance effects of caffeine compared to coffee during endurance exercise. PLoS One. 8(4):e59561. doi: 10.1371/journal.pone.0059561.
LINK:  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3616086/
Jówko E. Antioxidants in Sports Nutrition. Chapter 8: Green Tea Catechins and Sport Performance. © 2015 by Taylor & Francis Group, LLC. Bookshelf ID: NBK299060 PMID: 26065095
LINK:  https://www.ncbi.nlm.nih.gov/books/NBK299060/
Nehlig, A. & Debry, G. (1994). Caffeine and sports activity: a review. Int J Sports Med. 15(5):215-23.
LINK:  https://www.ncbi.nlm.nih.gov/pubmed/7960313/
Souza, D.B., Del Coso, J., Casonatto, J. & Polito, M.D. (2017). Acute effects of caffeine-containing energy drinks on physical performance: a systematic review and meta-analysis. Eur J Nutr. 56(1):13-27. doi: 10.1007/s00394-016-1331-9. 
Spriet, L.L. (2014). Exercise and Sport Performance with Low Doses of Caffeine. Sports Med 44(Suppl 2): 175. doi:10.1007/s40279-014-0257-8
LINK:  https://link.springer.com/article/10.1007%2Fs40279-014-0257-8