Core & carry · movement pattern
Dynamic Core exercises
What the dynamic core pattern is
Deliberate, controlled spinal motion produced by the trunk musculature — flexion (crunches, sit-ups, leg/knee raises), rotation (woodchops, twists), and lateral flexion (side bends) — the opposite job from carry_core's anti-movement work, and graded against different faults. Split out 2026-09-03 from carry_core, where these exercises were previously misfiled and graded against anti-rotation/anti-extension criteria that penalized the athlete for doing the exercise correctly.
Why it matters
NASM's OPT model names this "core strength" training — dynamic eccentric/concentric spinal motion through a full range, building concentric force production and eccentric control of the trunk, distinct from the stabilization phase's anti-motion bracing. This is real, useful training (direct abdominal hypertrophy/strength, spinal-flexion and rotational force production for throwing/swinging sports) — it is simply a different skill from resisting motion, and an athlete rotating hard through a woodchop or curling into a crunch is not making the same error a Pallof press or plank would flag.
Coaching cues
- Initiate the motion from the abs, not momentum or the hip flexors.
- Move through a full, controlled range — no half reps.
- Exhale through the contraction; don’t hold your breath to muscle it.
- Control the return as carefully as the working rep.
Common faults
- Using momentum/swinging instead of a controlled trunk contraction.
- Pulling with the neck/hip flexors instead of the abdominals.
- Cutting the range short at either end.
- Holding the breath through the whole rep instead of exhaling on the contraction.
- Letting the lower back arch off the floor/bench during a flexion rep instead of staying pressed into it.
- Using pure momentum on a rotational rep (twisting/whipping through) instead of a controlled, resisted turn.
Checking your form on video
Best camera angle: depends on the exercise. Depends on the exercise: side-on for flexion work (crunches/sit-ups), front-on for rotational work (woodchops/twists).