ThatвЂ™s because the increase in the coagulation factor affects those with other cardiovascular risk factors-think obesity, smoking, high blood pressure, or high cholesterol. ThatвЂ™s important, since blood clots can cause things like stroke, deep vein thrombosis, heart attack, and pulmonary embolism.Д«ut does this mean everyone should consider ditching their caffeinated energy gels or chews? Not at all, said lead researcher Paul Nagelkirk, Ph.D., the director of the Integrative Exercise Physiology Laboratory at Ball State University. They found that caffeine significantly increased the coagulation factor during exercise, meaning that the participants who had the caffeine drinks had a higher risk factor when it comes to what causes blood clots.

Win the Morning Rush With These Coffee Smoothies They were given either a non-caffeinated placebo or a caffeinated drink beforehand, and their blood was drawn before and after, along with vital signs reporting. The participants completed two sessions, a week apart, on exercise cycles that were gradually increased in speed until participant exhaustion-making it a high-intensity workout. In the study, which was published in Medicine & Science in Sports & Exercise, researchers looked at 48 men, with an average age of 23, and a normal body mass index. But, a new study throws a wrench its way, finding that the habit may be linked to higher chances of forming blood clots-which can lead to life-threatening effects in some people. Using caffeine as a preworkout prep and during-exercise booster is quite common, and can offer some real performance benefits, as weвЂ™ve reported before.

Limiting your caffeine to no more than 400 milligrams per day is still recommended.

But healthy people are not at the same risk. Increasing this coagulation factor can be dangerous in people with other risk factors for heart disease, like high blood pressure, high cholesterol, or obesity.Taking caffeine during a high-intensity workout can increase the coagulation factor in your blood, making it more likely to form clots, according to a new study in the journal Medicine & Science in Sports & Exercise.

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