Take a moment to pay attention to your breathing. If only your chest and shoulders are rising and falling when you breathe, you’re likely taking shallow breaths and not breathing properly.
You want to use your diaphragm - or diamond as I like to call it 💎 - when you breathe, which is a thin muscle underneath your lungs. When you take a breath, your diaphragm moves downward (and out), giving your lungs more room to fill up and expand. When you exhale (during talking or singing), you push your diaphragm upward (in).
You'll know you're breathing with your diaphragm if your belly expands when you inhale. It Is important to train yourself to breathe this way to better oxygenate your body and reduce stress.
Try practicing deep breathing for several minutes every day. Over time, it will become easier and feel more natural. And of course, you’re singing will improve!