This 15-minute core workout targets your deep transverse abdominis (TVA) muscles — the foundational layer of your midsection responsible for stability and that feeling of genuine tightness around your core. The format is simple and effective: 15 exercises, 45 seconds of work each, with 15 seconds of rest in between. All you need is a mat.
The Workout Structure
Each exercise is designed to challenge core stability, anti-rotation, and controlled movement rather than pure repetition. The emphasis throughout is on pressing your lower back into the mat, keeping your ribs pulled down, and maintaining tension even during transitions. Move with intention — slow and controlled beats fast and sloppy every time.
Exercises 1–5: Building the Foundation
1. Bear Hover Hold Arm Extension
Start on all fours and hover your knees just off the mat. Extend one arm forward, then the other, then tap one knee down and back up, alternating sides. Keep your hips square and your core braced throughout.
00:30
Demonstration of bear hover hold with alternating arm extensions and knee taps
Watch at 00:30 →
2. Hollow Hold Leg Circles
Lie on your back, lift your shoulders and legs into a hollow body position, and hold briefly. From there, make small controlled circles with your legs. The hollow hold itself is the challenge — maintain it without letting your lower back arch off the floor.
3. Dead Bug
Lying on your back, extend the opposite arm and leg simultaneously, then switch sides. Move slowly. Press your lower back gently but firmly into the floor and pull your ribs down on every rep. This is a precision exercise, not a speed drill.
4. Plank Knee-to-Elbow Tap
Get into a high plank and bring one knee toward the same-side elbow, then switch. Keep your hips level — they should not rock or rotate. Core tight, back flat.
03:30
Plank knee-to-elbow tap with stable hips demonstration
Watch at 03:30 →
5. V-Up
Sit tall with your legs extended. Pull your knees in toward your chest, then extend and lift into a full V-up. Control the descent on every rep — don't let momentum do the work.
Exercises 6–10: Midpoint Push
6. Reverse Crunch Leg Drop
Lie on your back and lift your knees toward your chest. Lower your legs slowly toward the floor, keeping your lower back pressed flat into the mat. If your back begins to arch, stop the range of motion there.
7. Reverse Tabletop
Lift your hips into a reverse tabletop position — hands behind you, knees bent, body parallel to the floor. Lower and repeat. Engage your glutes and core to keep the hips elevated.
8. Reverse Plank March
From the same reverse tabletop setup, extend your legs straight and lift alternating knees in a marching motion. Keep your hips up and your core braced. Do not let your hips sag toward the floor between reps.
07:00
Reverse plank march with straight legs and alternating knee lifts
Watch at 07:00 →
9. Bear Crawl
Back on all fours with knees hovering off the mat. Crawl forward a few steps, then back, maintaining that hover position the entire time. Core engagement is what keeps the movement stable — not momentum.
10. Roll Up to V-Sit
Lie flat on your back. Roll up smoothly into a V-sit, then extend back down with control. The roll-up should be slow and sequential — vertebra by vertebra — rather than a jerky sit-up motion.
Exercises 11–15: Finishing Strong
11. Plank with Knee Tap and Leg Lift
Hold a high plank and tap one knee to the mat, then lift that leg up behind you before switching sides. Maintain a flat back and avoid shifting your weight from side to side.
12. Alternate Hip Lift
Lie on your back with one leg extended toward the ceiling. Lift your hips, lower slowly, then swap legs. Keep the movement deliberate and controlled — your core drives the lift, not a thrust from your lower back.
11:00
Alternating single-leg hip lift with controlled lowering
Watch at 11:00 →
13. Flutter Kicks
Lying on your back, lift your shoulders and legs a few inches off the mat and flutter your legs up and down in small, rapid kicks. Keep your lower back pressed into the mat the entire time. If it lifts, raise your legs slightly higher.
14. Single-Leg Bridge Tuck
Lie on your back and lift into a bridge position. Tuck one knee toward your chest, hold briefly, then switch legs. Keep your hips level and your core engaged throughout the movement.
15. In-and-Out Variation
Lean back slightly with your hands behind you for support. Extend your legs out, kick them apart, bring them back together, then pull your knees into your chest. That full sequence counts as one rep. Finish strong — this is the final exercise.
Key Principles for Maximum Benefit
- Lower back contact: On all floor exercises, actively press your lower back into the mat rather than allowing it to arch.
- Rib position: Pull your ribs down and in. This activates the TVA and prevents the spine from extending under load.
- Controlled tempo: Especially on lowering phases — the eccentric portion of each movement is where deep core strength is built.
- Consistency: A single session will give you a burn, but the tightness and stability you're training for comes from returning to this workout regularly.
Complete all 15 exercises back to back and you have a thorough, equipment-free deep core session that takes less than 20 minutes from start to finish.
