Abd muscle contrac.: Both require an effort buy abdominal muscles and if violent & repetitive, u give ur abdominals a good work out.
Answered 3/24/2020
4.9k views
4 doctors weighed in across 3 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question