#muscle contraction

• Antispasmodic — Counteracting, preventing, or relieving spasms, meaning sudden, involuntary, and painful contractions of smooth or skeletal muscles. As a noun, it denotes any medication, herbal remedy, or bioactive compound clinically administered to induce muscle relaxation and soothe abdominal, renal, or biliary colic.
• Auxotonic — Relating to or characterized by a muscular contraction in which the tension within the fibers progressively increases as the muscle shortens (elongates); specific to movements executed against a variable elastic resistance (such as stretching a spring or the ejection phases of the heart).