Easy 20-Minute Abs and Core Workout (Summer Body Workouts At Home)

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Reviewed By: Ashley Castleberry

Want to work on that summer body from home without buying a single piece of equipment? You’re in the right place.

This 20-minute abs and core workout hits every part of your midsection with moves that actually work. No fancy gym membership needed—just grab a mat and follow along with 17 exercises that’ll have your core fired up in no time!

1

Double Pulse Crunches

Let’s kick things off with a crunch that has a little extra something. You’ll do two quick pulses at the top of each crunch, which really helps you feel those abs working harder than a regular crunch.

How to perform:

  • Lay down on your back with your knees bent and feet on the floor.
  • Place your fingertips lightly by your ears; do not pull on your neck.
  • Crunch up, pulse up a little higher, hold for a second, and then lower back down.
  • Keep your gaze upward and outward.
2

Extended Reverse Crunches

For this one, you’ll stretch your whole body out long, then crunch everything back in. Your fingertips and feet won’t touch the ground at all, so it takes some coordination to keep control.

How to perform:

  • Start on your back.
  • Extend both your arms (overhead) and legs (straight out) so your body is long.
  • Crunch in, bringing your knees to your chest and arms forward.
  • Extend back out without letting your fingertips or feet touch the ground.
  • Press your lower back into the floor throughout the movement.
3

Tabletop Plank Walks

This move is all about keeping your back flat while you step your feet in and out. If you find your hips moving around too much, slow it down and really focus on keeping that core tight.

How to perform:

  • Start in a high plank position with your hands planted directly under your shoulders.
  • Keep your back as flat as possible.
  • Step one foot in, then the other, so your knees are hovering directly under your hips (Tabletop position).
  • Step your feet back out one by one to the starting plank position.
  • Keep your core engaged and try not to move your back or hips excessively.
4

Seated In & Out Leg Lifts

You’ll be extending your legs low, bringing them in, then extending them high. The pattern might feel tricky at first, but once you get the rhythm going, it flows pretty smoothly.

How to perform:

  • Sit on your mat with your hands on the floor behind you for support.
  • Lean back slightly and lift your legs off the ground.
  • Extend your legs straight out (low).
  • Bring your knees in toward your chest.
  • Extend your legs straight up (high).
  • Bring your knees back in.
  • Repeat the pattern: Low extension, tuck, high extension, tuck.
5

Plank Knee-to-Elbow Combo

Here’s where we add some cross-body work to fire up those obliques. You’ll bring each knee to the opposite elbow first, then to the same side – it’s like a little dance in your plank.

How to perform:

  • Start in a high plank position on your hands.
  • Bring your right knee to your left elbow (cross-body).
  • Bring the same right knee to your right elbow (side).
  • Return the leg to the starting plank position.
  • Repeat with the other leg (Left knee to right elbow, then left knee to left elbow).
6

Straight Leg Sit-Ups

Classic sit-ups, but with your legs completely straight out. This makes your abs work way harder to pull you up, so don’t worry if you can only come up partway at first.

How to perform:

  • Lay flat on your back with your legs completely extended on the floor.
  • Place your fingertips by your ears.
  • Engage your core to sit all the way up.
  • Lower yourself back down with control.
7

Bent-Knee Windshield Wipers

Your legs will drop side to side like windshield wipers while you use your abs to control the movement.

The key is not letting them just fall – you want to feel your core bringing them back to center.

How to perform:

  • Sitting on your bum with your arms out to the sides for support.
  • Lift your legs and keep a slight bend in your knees.
  • Drop your legs down to one side, using your core to control the movement.
  • Use your abdominals to bring your legs back to the center.
  • Drop your legs to the other side and repeat.
8

Alternating Toe Touches

This one’s pretty straightforward – you’ll reach up to touch your toes as you lift one leg at a time. It’s a nice way to work your abs while getting a little stretch in your hamstrings too.

How to perform:

  • Go back to that tabletop position on your hand.
  • Lift your right leg and crunch up to touch your toes with your left hand.
  • Lower back down.
  • Lift your left leg and touch your toes with your right hand.
  • Alternate sides.
9

Side Plank Hip Dips

You’ll be on your side for this one, dipping your hips down and squeezing back up. Make sure you’re not sinking into that bottom shoulder – keep it strong and stable the whole time.

How to perform:

  • Get into a side plank position on your hand.
  • Stack your feet (or stagger them for balance).
  • Drop your hips down toward the mat.
  • Squeeze your obliques to lift your hips back up high.
  • Keep your supporting shoulder strong; do not sink into it.
  • (Perform on one side for the first interval, then the other side in the second interval).
10

Leg Drop with Knee Tuck

As you lift your legs back up from the drop, you’ll tuck one knee in toward your chest. It’s a nice variation that keeps things interesting and hits your abs from different angles.

How to perform:

  • Lay on your back with your hands under your glutes for support.
  • Start with both legs straight up in the air.
  • Lower both legs down toward the floor.
  • As you lift back up, tuck one knee into your chest while keeping the other leg straight.
  • Extend the tucked knee while simultaneously tucking the opposite knee in.
  • Extend the second knee so both legs are straight again.
  • Return both legs to the starting position.
  • Repeat the sequence.
11

Commando Plank Jacks

This one’s a bit complex – you’ll go from your hands to your elbows, do a plank jack, then back up to your hands for another jack.

It takes some practice to get the rhythm down, but it’s a great full-body move.

How to perform:

  • Start in a high plank on your hands.
  • Lower down onto your forearms, one arm at a time (Commando).
  • Perform one Plank Jack (jump feet out and in) while on your elbows.
  • Push back up to your hands, one arm at a time.
  • Perform one Plank Jack while on your hands.
  • Repeat the sequence.
12

Vertical Leg Crunches

Bring one knee toward your chest as you crunch up, then alternate sides. This dynamic movement targets your abs while keeping the exercise engaging.

How to perform:

  • Lay on your back with your hands hovering by your side for balance.
  • Extend both legs out straight, resting on the floor.
  • Crunch up while bringing one knee toward your chest.
  • Lower back down as you extend that leg back out.
  • Repeat on the opposite side, alternating legs.
13

Bicycle Crunches

You know these – they’re a classic for a reason! Just remember to actually meet that elbow to the opposite knee in the center, and keep your gaze up so you’re not straining your neck.

How to perform:

  • Lay on your back with hands behind your head and knees bent.
  • Keep both feet on the floor with knees bent.
  • Crunch up and twist your torso to bring one elbow toward the opposite knee.
  • Lower back down slightly.
  • Twist to the other side, bringing the other elbow toward the opposite knee.
14

Seated L-Sit Pulses

You’ll hold one leg up while the other hovers, then pulse the bottom leg twice before switching.

After alternating both sides, you’ll finish with scissor switches to keep your core engaged throughout the entire sequence.

How to perform:

  • Sit back on your elbows/forearms.
  • Extend both legs; lift one leg straight up and keep the other hovering off the floor (L-shape).
  • Pulse the bottom leg for 2 counts.
  • Switch legs (scissor switch).
  • Pulse the other leg for 2 counts.
  • Perform scissor switches for 4 counts.
  • Return to the L-shape position and repeat the sequence.
15

Leg Drop Open/Close

This move has a few steps: drop your legs down, open them wide, close them, tuck your knees in, then extend back up.

It might sound complicated, but once you get the pattern, it flows together nicely.

How to perform:

  • Lay on your back with hands under your hips.
  • Start with legs straight up.
  • Lower both legs down toward the floor.
  • At the bottom, open your legs wide, then close them.
  • Bring your knees in toward your chest (tuck) and extend them back straight up.
  • Repeat the cycle: Drop, Open, Close, Tuck, Up.
16

Leg Swoops (U-Crunches)

Your legs will swoop down and around in a U-shape motion. The sweeping movement keeps your abs engaged the whole time while working them through different ranges.

How to perform:

  • Lay flat on your back with arms extended overhead.
  • Simultaneously lift your legs and upper body off the floor.
  • Reach your hands toward your ankles, lifting your shoulder blades and head off the floor.
  • Lower back down with control.
  • Repeat the movement, keeping your core engaged.
17

Plank Hold (with optional Hip Dips)

We’re finishing with a good old plank hold. Just keep that body straight and squeeze everything tight.

If you want an extra challenge, add some side-to-side hip dips – your obliques will thank you later.

How to perform:

  • Get into a standard plank position on your forearms.
  • Keep your body in a straight line from head to heels.
  • Squeeze your glutes and core.
  • Hold the position steady, or add side-to-side hip dips for added difficulty.
  • Hold until the workout ends.

Article Medically reviewed by

I’m fitness coach Ashley Castleberry, an NASM-certified personal trainer and nutritionist, as well as a coach on an established YouTube Channel with over 1 million followers. With certifications from major fitness brands, I specialize in athletic, HIIT, and strength training. Leveraging my experience coaching clients on lifestyle changes, I provide customized exercise and nutrition guidance to help people reach their fitness goals, whether that be weight loss, muscle gain or overall health improvement.

Writer & Editor
Tonya McIntosh

Hi, I’m Tonya McIntosh — Founder of TGFFitness, NASM-certified Nutrition Coach, and Personal Trainer. With over 8 years of coaching experience, I’ve seen firsthand that the biggest challenge most people face isn’t starting — it’s staying consistent.

Finding your true motivator is the key to lasting results — and I’ll show you how. Keep Reading.

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