Which exercises do experts commonly recommend to lose some belly fat and get a tight stomach?

Cardio Mix: You can not target the abdomen specifically for weight loss - if you have adipose tissue to lose (not everyone does), then consider an increase in cardio and a balanced diet. However, do not always do the same exercise or you will increase your risks for stress injuries. Mix things up with walking, running, biking, swimming, or circuit training. Ultimately you need to burn more than you consume.

Aerobic first: An aerobic exercise program that works on cardiovascular conditioning [ key to metabolic changes from exercise] and expends a great deal of calories will be effective with weight loss. Swimming / biking will also work well. Maintaining muscle mass with weights is also very helpful. Finally calisthenics especially situps and crunches to tone are helpful as well.

Spot fat loss does : Not occur naturally. By losing weight in general some will probably be abdominal fat. But, we don't get to choose what area of body fat is lost from. Eat healthy ; be physically active. Calories burned must > those consumed. Tighten ab's: crunches, reverse crunches, exercise ball crunches, pelvic thrusts, lying leg raises, side bridge ; “bicycling” exercise on back. Do regular aerobic exercise.