One of the most effective ways to apply progressive resistance is through weight training

The type of fish is thought to be the evolutionary ancestor to land-living creatures is the Coelacanth which is a lobe finned fish. A category of fish fit in to the group of sarcopterygii that are typically extinct bony fishes basically considered by robust and stubbly lobe fins contain a robust internal skeleton, cosmoid scales and internal nostrils. The coelacanth is another lobe finned fish that is a living fossil. It is supposed to have evolved into approximately its current form about 408 million years ago during the early Devonian and has not fundamentally evolved further from its ancient form.