Core & Ab Workout: Abs, Obliques & Lower Back
Beginner

Core & Ab Workout: Abs, Obliques & Lower Back

Used by thousands of athletes in the FitPlanner app

20 min
Bodyweight, optional Ab Wheel
Abs, Obliques, Lower Back, Core Stability

A strong core does more than help your abs look better β€” it supports better lifting, posture, balance, and lower back health. This routine combines anti-extension, anti-rotation, and flexion-based movements so you train your midsection from every important angle. It is short enough to add after any workout, but effective enough to stand alone.

Exercises

Exercise 1

Dead Bug

Deep Core, Abs, Hip Flexors
3Γ—10 each side Sets Γ— Reps
30s Rest
Press lower back firmly into floor throughout. Move slowly.
Exercise 2

Plank

Abs, Core, Shoulders
3Γ—45s Sets Γ— Reps
30s Rest
Don't let hips sag or pike up. Breathe steadily.
Exercise 3

Crunches

Upper Abs
3Γ—20 Sets Γ— Reps
30s Rest
Lower back stays on floor. Lift with ab muscles, not neck.
Exercise 4

Side Plank

Obliques, Glute Medius, Core
3Γ—30s each side Sets Γ— Reps
30s Rest
Body in straight line. Don't let hips sag toward floor.
Exercise 5

Leg Raises

Lower Abs, Hip Flexors
3Γ—15 Sets Γ— Reps
30s Rest
Hands under lower back for support. Keep legs as straight as possible.
Exercise 6

Russian Twist

Obliques, Abs
3Γ—20 (10 each side) Sets Γ— Reps
30s Rest
Lean back 45Β°. Twist your torso, not just your arms. Feet off floor = harder.
Exercise 7

Hollow Body Hold

Abs, Deep Core, Hip Flexors
3Γ—20–30s Sets Γ— Reps
30s Rest
Press lower back into floor. Arms extended overhead. Tuck knees if needed.

How to do this workout

  1. Warm up for 5–10 minutes with light cardio and a few dynamic mobility drills for the muscles you are about to train.
  2. Complete the exercises in the order listed so the biggest movements get your best energy and focus.
  3. Respect the listed rest periods, keep technique strict, and stop each set 1–2 reps before form breaks.
  4. Finish with a short cool-down, easy walking, and light stretching for the muscles you just trained.

Frequently asked questions

Will this give me a six-pack?

Core training strengthens and develops the abs muscles. However, visible abs require low body fat β€” which comes mainly from diet and overall calorie balance.

How often can I train abs?

The core recovers quickly. 3–4 times per week is effective. You can even do this workout on days between other training sessions.

Is this workout good for lower back pain?

Exercises like Dead Bug and Bird-Dog are specifically designed to build core stability and can help with lower back health. If you have acute pain, consult a physician first.

Free workout plan + free tracking app

Track this workout in the FitPlanner app. It's free.

Download FitPlanner to log sets, save favorite routines, and follow your progress from session to session.