Quad RNT
Quad RNT
A reactive neuromuscular training core drill using a Swiss ball against a wall—push into the ball to create instant resistance and challenge trunk and shoulder control.
Muscles Targeted
Deep core stabilizers (anti-extension/anti-rotation), serratus anterior, scapular stabilizers, and glutes (to keep pelvis steady).
Key Benefits
- Self-adjusting resistance—push harder for more challenge
- Trains reflexive postural control under pressure
- Builds shoulder endurance while the trunk stays braced
- Great option for advanced core circuits without heavy loading
Equipment Needed
Swiss ball and a wall (plus a mat if desired).
How to Perform Quad RNT
- Set up in quadruped facing a wall with a Swiss ball in front of you.
- Place hands on the ball and press it into the wall to create resistance.
- Keep ribs down and pelvis level as you maintain pressure.
- Breathe steadily and hold tension for time.
Programming Options
- 15–30 second holds, 2–5 sets
- Rest 45–90 seconds
- Progress by increasing pressure into the ball (not by losing position)
Why This Variation Works
Pressing into the Swiss ball creates continuous feedback and perturbation—your trunk and shoulder girdle must stay organized as effort increases.
When to Use It
Advanced core circuits, shoulder prehab, and stability phases where you want high challenge without heavy external loading.
Frequently Asked Questions
How hard should I press into the ball?
Start with moderate pressure that lets you keep ribs down and a neutral spine. Increase pressure only if alignment stays clean.
What if I feel it in my low back?
Reduce pressure, tuck ribs down, and shorten the hold. The trunk should brace without lumbar arching.
How do I progress it?
Increase hold time, increase pressure, or add a small reach/tap challenge once you can hold steady.