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Bear and bigcats anatomy
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After researching the physiology and anatomical composition of animals, I find that the most muscular mammals are the wild felines.
It is not possible to make comparisons between them, the felines, due to the differences in dissection methods, especially with respect to the extraction of body fat. This is in reference to the two scientific papers from which these data are taken: Davis (1962) cited in Munro (1969) and Pitts and Bullard (1969). Lions, possess a mean musculature of 58.8 % without including body fat in the total body weight (Davis 1962), and 57.1 % (Mentioned in (Cuff et. al. 2017)), including the "excessive fat" that one of the specimens had (Something that the original author mentioned). Bobcats and Canada lynx, had a muscle percentage of 58.5 and 56.5 % respectively including fat, but 66.5 and 66.1 % of fat-free body weight (Pitts and Bullard 1969). Lions, even with the percentage of muscle including fat (57.1 %), would possess a greater musculature than any mammal according to Munro (1969) who compared the relative musculature of various mammals, including lions (with the figure of 58.8 % not including body fat). Bobcats and lynx had the highest percentages of musculature, after two species of squirrels, the eastern gray squirrel Sciurus carolinensis and red squirrels Tamiasciurus hudsonicus, which possessed percentages of 61.4 and 59.2 % respectively (this taking into account fat as one of the body elements). But squirrels had unusually low amounts of body fat, compared to felids, and things change when body fat is not taken into account as an element of total body weight. Eastern gray squirrels and red squirrels possess relative musculature of 62.8 and 61.5 % of total fat-free body weight, respectively. Lower values compared to bobcats and Canada lynx under the same situation, which amount to 66.5 and 66.1 % respectively. The image is my creation and the sources are cited, and the copyright of the images are also cited. Translated with http://www.DeepL.com/Translator (free version). *I not speak english. Sources: https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1558-5646.1962.tb03240.x https://onlinelibrary.wiley.com/doi/epdf/10.1111/j.1558-5646.1962.tb03240.x https://www.nap.edu/read/20255/chapter/3#45 https://palaeo-electronica.org/content/2017/1857-reconstructing-a-fossil-lion https://books.google.es/books?id=FDHLBAAAQBAJ&lpg=PA133&lr&hl=es&pg=PA154#v=onepage&q&f=false https://books.google.es/books?id=-iBS6-2OO3wC&lpg=PR5&dq=Size%2C%20function%2C%20and%20life%20history&lr&hl=es&pg=PA19#v=onepage&q&f=false https://brainevo.sitehost.iu.edu/publications/schoenemann.BBE.04.pdf http://www.pinniped.net/muchlinski2012.pdf  *This image is copyright of its original author
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