The anaerobic lactic energy system is where the muscles do not use oxygen and lactic acid is produced.Making the best of Energy production Different events require athletes to use combinations of the three energy systems.he anaerobic lactic energy system is where the muscles do not use oxygen and lactic acid is produced.
Photo Credit Michele D. Lee/Demand Media. Stir the ground beef every three to five minutes as it cooks in the skillet. Break apart the cooking meat with the spatula to get the chunks smaller if desired. Cook the ground beef for eight to 10 minutes or until no pink remains in the middle of the pieces. The USDA recommends cooking ground beef until it reaches an internal temperature of 160 degrees Fahrenheit.
Ground beef must be cooked until the internal temperature reaches a minimum of 160Â°F to ensure that dangerous bacteria are destroyed. Ground beef dishes, such as meatloaf, should be checked for doneness with a meat thermometer.raditional guidelines for doneness state that beef cooked very rare, rare, or medium-rare should have an internal temperature ranging between 115ÂºF to 140Â°F. Many people prefer beef cooked rare (especially steak), but this decision is up to the consumer and is certainly not recommended by the USDA.