Most of these supplements are based on caffeine, containing anywhere from 100-300 mg of caffeine in a serving. When caffeine enters the body, systems start working harder to evacuate the substance from inside. Just to compare, there is about 100 mg in an 8 ounce cup of coffee. There are events in the body like increased heart rate, increased blood pressure, the kidneys working harder causing frequent urination, and mental excitement. Like many drugs, people tend to develop tolerances and are de-sensitized to the effects of caffeine, resorting to larger doses to achieve a mental high. Make no mistake, caffeine is a powerful drug and has been associated with such silent killers as hypertension. Chronic and immoderate caffeine use can put undue stress on the adrenal glands and even lead to symptoms such as adrenal fatigue. So, do you think you can Purchase Xwerks?
I use pre-workout supplements from time to time, but I try to do it with an understanding and respect of their power, and a strategic application to my training. There is definitely a performance advantage when applied in the correct doses to the correct training. These products work. The University of Connecticut performed a study clearly showing an increase in bench press and grip strength for groups using pre-workout caffeine stimulants.