Reviewed by Jennifer Robinson, MD on0/, 014. Weight cycling is losing weight and regaining it over and over. It's called yo-yo dieting when it happens because of dieting. Weight cycles can be big (50 pounds or more) or small (5-10 pounds).
Ostriches share the order Struthioniformes with the kiwis, and other ratites. It is distinctive in its appearance, with a long neck and legs and the ability to run at maximum speeds of about 70 km/h (45 mph), the top land speed of any bird. The ostrich is the largest living species of bird and lays the largest egg of any living bird.
Cheetahs, the fastest animals on four legs, run at an average speed of 50-70 mph. They are built for speed, with front legs that can stretch up to 20 feet in a single stride. Earlier this week, a cheetah called Sarah at Cincinnati Zoo, Ohio, was recorded running 100m in just 5.95 seconds, making her 40 per cent faster than Bolt.