**1. Spring-like spine structure**

The feline spine is composed of 53 vertebrae, far more than the 26 vertebrae of humans. Its super flexibility allows the body to stretch to 1.5 times its body length when running, just like a spring storing energy and releasing it.

**2. Explosive muscle group**

The gastrocnemius muscle accounts for 15% of the hind limbs (only 1% for humans), and the fast-twitch muscle fiber content is as high as 80%, which can accelerate from a standstill to 48km/h in 0.1 seconds, comparable to the starting speed of cheetahs.

**3. Evolutionary specialization of claw structure**

The telescopic hook claw generates grip when embedded in the ground, the palm fat pad cushions the impact, and the toe-walking gait (only the toes touch the ground) converts 100% of the leg kinetic energy into propulsion.

**4. Dynamic balance system**

The semicircular canals of the inner ear accurately perceive three-dimensional space, and with the clavicle and whip-like tail that can rotate 270°, it can achieve millisecond-level center of gravity adjustment during high-speed changes, and can also adjust the landing point in the air.