Bethan Mooney for TIME
July 5, 2017 4:17 PM EDT

The following story is excerpted from TIME’s special edition, The Science of Exercise, which is available at Amazon.

If your exercise routine is in need of an update, look no further. Exercise isn’t boring with these four innovative (and wacky) fitness routines.

Contact us at letters@time.com.

Read More From TIME

Related Stories