From mermaid swimming to dog yoga, a number of unusual fitness trends have hit the headlines in recent years. But the latest fad is arguably the most bizarre yet. Fitness fanatics are scuttling around ...

Sept. 24 (UPI) --A Japanese man channeled his inner quadruped and broke a Guinness World Record by running 328 feet in 14.55 seconds -- on all fours. Ryusei Yonee, 22, broke the record for fastest 100 ...