
Bicycle crunch: Twisting at high speeds is a recipe for herniated discs and muscle spasms.

Lat pull-down (behind the head): If something in your shoulder doesn't feel right, stop and find another exercise.

Kettlebell swing: If performed incorrectly, the repetitive swinging motion could result in rotator cuff injury.

Bent-over row: Hinging from the waist causes your shoulders to roll forward, which can contribute to poor posture.

Romanian dead lift: Most commonly, a person will fall into hyperextension through the low back while lowering and lifting weight, which could result in lumbar disc injury or muscular spasm.

Overhead squat: The actual overhead motion adds strain to shoulder, cervical, thoracic and lumbar regions.

Backward medicine ball rotation toss (against a wall): It's never a good idea to forcefully rotate your spine backward.

Seated leg extension: It places undue stress across your knee joint, affecting the delicate cartilage under the patella.

Pull-up: Done improperly, pull-ups can lead to shoulder issues.

Preacher curl: There is no stabilization of your core or lats because your shoulder blades are out of place and you are in a forward posture.