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

The concentric phase of a biceps curl should involve normal exhalation through an open glottis, not a Valsalva maneuver, which is not considered a normal or safe part of this phase.

The Valsalva maneuver specifically involves a closed glottis with an expiratory effort; inspiration through an open glottis describes normal inhalation, which is the opposite of the maneuver.

The eccentric phase of a biceps curl should involve controlled inhalation through an open glottis, and the Valsalva maneuver is not a normal component of any phase of a standard curl.

During the Valsalva maneuver, the glottis is closed and the individual strains to exhale, which dramatically increases intrathoracic and intra-abdominal pressure without allowing airflow. This pressure response can transiently stabilize the spine under heavy loads but simultaneously causes a sharp rise followed by a drop in blood pressure, making it potentially hazardous - particularly for individuals with cardiovascular conditions.