We don't know: Every few years, the numbers for track stars get faster. With continued improvements in conditioning in nutrition, who knows? We'll never be as fast as a cheetah but, at one time, the sub four minute mile was considered impossible.
Answered 9/28/2016
5.3k views
4 doctors weighed in across 2 answers
4 doctors weighed in across 2 answers
5 doctors weighed in across 2 answers
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