When it comes to sheer physical strength, lions possess a muscular body structure and size that grants them greater strength compared to hyenas, despite their lack of agility and endurance. However, bears are generally stronger than lions. Among bears, sloth bears exhibit physical force on par with adult tigers (and lions), while also possessing greater quickness, flexibility, and defensive abilities, making them highly lethal. However, in terms of pure physical strength, brown bears and polar bears surpass sloth bears. Bears, including polar bears, are not just masses of fat; beneath their fat layer, they possess formidable muscles that provide them with incredible power among mammalian predators. It’s worth noting that bears are omnivores, while polar bears, living in the Arctic, predominantly rely on meat, primarily seals. Whether a tiger or a lion is stronger than a bear depends on the specific bear species being compared.