Air speed is defined as the speed of an airplane with relation to the air, as compared to regular speed, which is the speed relative to the earth. In 1968, according to the Guinness Book of World Records, a record airspeed of 2,070.102 mph (925 m/s) was achieved by a Lockheed YF-12A.
Physical therapy sessions typically last 30â60 minutes each, from one to many times a week, depending on why a person is receiving therapy. As you make progress, your visits may change in length and frequency. You'll learn new techniques to help continue your healing.
Remember, you're the only one who can judge your need for pain relief. How long it lasts: Active labor often lasts up to eight hours. For some women, active labor lasts hours longer. For others â especially those who've had a previous vaginal delivery â active labor is much shorter.