Which of the following describes a Valsalva maneuver performed during a free weight biceps curl?

The Valsalva maneuver is not a normal or safe part of the concentric phase; clients should exhale with an open glottis while lifting.

Inspiration through an open glottis describes normal inhalation, not the Valsalva maneuver, which requires a closed glottis and a forced expiratory effort.

The Valsalva maneuver is not a normal part of the eccentric phase; proper technique calls for inhalation through an open glottis during the lowering phase.

The Valsalva maneuver specifically involves attempting to exhale forcefully while keeping the glottis closed, which dramatically increases intra-thoracic and intra-abdominal pressure. This pressure spike can cause dangerous elevations in blood pressure and is contraindicated for most fitness clients. Proper breathing technique during a biceps curl calls for exhaling through an open glottis during the concentric phase, not performing a Valsalva.