Black coffee that contains caffeine can help reduce some belly fat by boosting the metabolic rate of your body.
When your metabolic rate is boosted then you burn off calories so you lose some belly fat.
You won't lose much belly fat just drinking black coffee but the black coffee can help with belly fat loss.
You still should exercise and even use a rowing machine and treadmill to help lose belly fat and shed the lbs.
Even Jogging, fasting and watching your calorie intake can help you lose belly fat much faster than just trying to lose belly fat by drinking coffee.
Coffee does help you lose belly fat but it's just a short term thing and you have to do other things including the exercise to help you shed the lbs and lose the weight.