Tight muscles: What you describe could be due to tight muscles in your back or tight hip flexors. When you sit, that muscle tightens up. With your legs bent it is under less stress. With the leg straight it may pole on your spine and your legs. Try stretching exercises for the hip flexor and low back.
Answered 3/11/2016
1.5k views
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