Lie back on a flat bench. Using a medium width grip (a grip that creates a 90-degree angle in the middle of the movement between the forearms and the upper arms), lift the bar from the rack and hold it straight over you with your arms locked. This will be your starting position.
From the starting position, breathe in and begin coming down slowly until the bar touches your middle chest.
After a brief pause, push the bar back to the starting position as you breathe out. Focus on pushing the bar using your chest muscles. Lock your arms and squeeze your chest in the contracted position at the top of the motion, hold for a second and then start coming down slowly again. Tip: Ideally, lowering the weight should take about twice as long as raising it.
Repeat the movement for the prescribed amount of repetitions.
When you are done, place the bar back in the rack.
If you are new at this exercise, it is advised that you use a spotter. If no spotter is available, then be conservative with the amount of weight used.
Also, beware of letting the bar drift too far forward. You want the bar to touch your middle chest and nowhere else.
Don't bounce the weight off your chest. You should be in full control of the barbell at all times.
Alternative Exercises For Barbell Bench Press - Medium Grip