Many studies have proven that drinking caffeine during pregnancy might affect the growing fetus. Black coffee, being a rich source of caffeine, can increase the metabolic activity and heart rate. The growing fetus does not have enough strength to withstand this increase in heart rate. Black coffee and other caffeine drinks must be avoided during early pregnancy.
A vacuum coffee maker brews coffee using two chambers where vapor pressure and vacuum produce coffee. This type of coffee maker is also known as vac pot, siphon or syphon coffee maker, and was invented by Loeff of Berlin in the 1830s. These devices have since been used for more than a century in many parts of the world and more recently have been given a new use by bartenders and chefs to make hot cocktails and broths.
Originating in Australia and similar to the Mazagran, the minimal Ice Shot is a single shot of fresh espresso poured into an ordinary latté glass that has been filled with ice. The hot coffee, in melting some of the ice is diluted, re-freezing to a granita-like texture. The addition of a single scoop of ice-cream on top is a popular variant. No milk, sugar, extra flavouring or cream are involved.
Some health benefits of coffee come from the beverage's caffeine content and not necessarily from the coffee itself. For example, the review of studies published in Australian & New Zealand Journal of Psychiatry determined there was also a nonlinear association between caffeine and a lower risk of depression, in addition to the link with coffee itself. Caffeine, a stimulant, also has a beneficial effect on athletic performance, with research published in 2016 in the Journal of Sports Science determining that dosing with caffeine prior to physical activity increased "vigor" and decreased fatigue. To use this to your benefit before working out, drink a cup of black coffee about 30 to 45 minutes before you begin exercising.