1, beef tenderloin and beef tendon.

2. If you want to eat beef during fitness, it is recommended to choose parts with relatively low fat content, such as beef tenderloin and beef tendon.

3. Beef tenderloin is tender and lean meat cut from the back of cattle, while beef tendon is the muscle from the knee joint to the upper thigh of cattle, containing more tendons. Both of them have low fat content, but they are very soft and chewy, so they are more suitable for fitness.