Sing Vocal Exercises with the Voice Most Natural for the Range

Vocal exercises work best if you’re using chest or head voice in the range of notes where the vocal cords sit in that voice type naturally. In other words, not pushing the chest voice into the head voice's range, or not bringing the head voice down into the chest range, but allowing the natural ranges. Then voice development and strengthening occurs where the natural ranges are to create a blended, connected, unified, and resilient voice.