Which of the following is a Level 2 Mat Exercise requiring caution for neck injuries?

• A. Corkscrew
• B. Rollover
• C. Jackknife
• D. Teaser

Answer: (C)

A Level 2 mat exercise that requires caution for neck injuries is the Jackknife. This move adds a pronounced spinal arc and a controlled roll from the upper back through the hips, so the neck is often asked to support or align with a changing torso position as you move. The combination of a deep spinal articulation and head alignment means the neck can experience extension and weight-bearing load in a way that risks irritation for someone with a neck injury. If neck symptoms are present, it’s wise to modify—keep the neck in a more neutral position, reduce the range, or substitute a safer variation while maintaining control and proper breathing. Other options involve different neck demands, but the Jackknife is the one most commonly flagged for extra neck caution.