Hello. When looking at caffeinated beverages for fitness training, especially later in the day, it is important to consider both the source and the dosage.
Standard brewed coffee contains about 95 mg of caffeine per 8 ounces, espresso has around 63 mg per shot, black tea has about 50 mg, and energy drinks range from 80 to 160 mg. For safe physical training, health guidelines generally recommend a maximum of 3.0 to 6.0 milligrams of caffeine per kilogram of body weight, usually capped at 400 mg per day for healthy adults. Because you mentioned your evening schedule, I strongly advise keeping your intake lower or avoiding caffeine entirely within six hours of bedtime to protect your sleep quality and recovery.