Technically there’s no such thing as a “bad” exercise. It’s just that most of these don’t have a good reisk/reward ratio in my book, or they are just designed to be overly fatiguing (although some people like Boot Camp style exercises, and if you’re in the military or a CrossFitter, by all means go for it).

• Sit ups (and sit up with ball toss)
• Almost every standing hip flexion based movement (way too easy. Most of them are dance moves)
• SIde bends (train the Quadratus Lumborum lower back muscle, not your obliques)
• Starfishes
• Swiss ball crunches for beginners
  • even though it gets you off the floor and cushions the lower back you will struggle to find the ideal balance point
  • If you can tolerate scooching far enough back then go for it, otherwise use a BOSU if you can justify the cost
• Random hand movements during planks (see the beginning of the YT video where I rip on this right off the bat)
• Roll Up (Literally all momentum as you roll yourself from on your back into a standing posture)
• Bridhe roll uos (just do a sinlgle leg bridge)
• Half Get Up (usually too much going on, people suck at Turkish Get Ups in general)
• Partner wheelbarrows (basically just a shoulder ex)
• Any of the “sneaky” ab exercises.
  • Yes you engage your core in the squat but not your six pack muscles
• Med ball russian twists (usually the med ball isn’t even necessary)
• Mountain climbers (just exhaust you too fast)