English Meaning: The name Cliff is an English baby name. In English the meaning of the name Cliff is: River ford near a cliff. American Meaning: The name Cliff is an American baby name.
Core exercise is any exercise that works any part of your trunk to your pelvic region. When most people tell me they want to work on their core, this means they want to work on their abdominal muscles. The abs aren't the only part of your core as so is your back and spine.
Some of the best core exercises are simple bodyweight exercises, including the following. Dragon Flag Advanced Core Exercise. Credited to martial arts master, Bruce Lee. The Dragon Flag is arguably one of the most advanced bodyweight exercises you can do.