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Workouts· 2026-01-28

Advanced Ab HIIT Workout Part 3 | Core HIIT Series - Crunch & Twist

Challenging leg lift and V-up variations that demand serious control and strength. If you've mastered the basics, this is your next step.

Ready to take your ab training up a level? This advanced ab HIIT workout combines challenging leg lift and V-up variations that demand serious control and strength. If you've mastered the basics, this is your next step.

The Workout

Format

  • 40 seconds work per move
  • 20 seconds rest between moves
  • 3 rounds total
  • Rest 1 minute between rounds

The Moves

1. Single Leg V-Up

Targets abs with an extra balance challenge. Alternate legs each rep to keep your core working overtime.

2. Straddle Leg Lift

Works lower abs and hip flexors with a wider range of motion. Keep your legs wide and controlled throughout the movement.

3. Straight Legged Hip Raise

Builds lower ab strength and spinal stability. Lift your hips straight up towards the ceiling, keeping your legs vertical.

Why Progression is Key

If you always stick to easy ab moves, your progress will stall. Advanced variations:

  • Increase strength and control by demanding more from your muscles
  • Build definition faster through greater muscle activation
  • Challenge coordination and mobility for a more athletic core

Try It Now

Run this advanced ab HIIT workout for three rounds. In under 10 minutes, you'll push your abs to new levels of strength and endurance.

Tip: Don't let momentum do the work - slow, controlled lifts are the secret to progress. If you can't maintain form, drop back to the earlier workouts in this series.

Real transformations

The results speak for themselves.

Scotty Grant results
BeforeAfter

Scotty Grant

Mind Core Fitness client

Emily Paterson results
BeforeAfter

Emily Paterson

Mind Core Fitness client

Lee Bazzie Duncan results
BeforeAfter

Lee Bazzie Duncan

Mind Core Fitness client

Mike Mortz results
BeforeAfter

Mike Mortz

Mind Core Fitness client

Kirsty Duncan results
BeforeAfter

Kirsty Duncan

Mind Core Fitness client

Charlie Anderson results
BeforeAfter

Charlie Anderson

Mind Core Fitness client

James Ferguson results
BeforeAfter

James Ferguson

Mind Core Fitness client

Kara Gill results
BeforeAfter

Kara Gill

Mind Core Fitness client

Russell Anderson results
BeforeAfter

Russell Anderson

Mind Core Fitness client

Emily Paterson results
BeforeAfter

Emily Paterson

Mind Core Fitness client

Emily Paterson results
BeforeAfter

Emily Paterson

Mind Core Fitness client

Georgia Laing results
BeforeAfter

Georgia Laing

Mind Core Fitness client

Mike Mortz results
BeforeAfter

Mike Mortz

Mind Core Fitness client

Georgia Laing results
BeforeAfter

Georgia Laing

Mind Core Fitness client

Mike Mortz results
BeforeAfter

Mike Mortz

Mind Core Fitness client

Scotty Grant results
BeforeAfter

Scotty Grant

Mind Core Fitness client

Emily Paterson results
BeforeAfter

Emily Paterson

Mind Core Fitness client

Lee Bazzie Duncan results
BeforeAfter

Lee Bazzie Duncan

Mind Core Fitness client

Mike Mortz results
BeforeAfter

Mike Mortz

Mind Core Fitness client

Kirsty Duncan results
BeforeAfter

Kirsty Duncan

Mind Core Fitness client

Charlie Anderson results
BeforeAfter

Charlie Anderson

Mind Core Fitness client

James Ferguson results
BeforeAfter

James Ferguson

Mind Core Fitness client

Kara Gill results
BeforeAfter

Kara Gill

Mind Core Fitness client

Russell Anderson results
BeforeAfter

Russell Anderson

Mind Core Fitness client

Emily Paterson results
BeforeAfter

Emily Paterson

Mind Core Fitness client

Emily Paterson results
BeforeAfter

Emily Paterson

Mind Core Fitness client

Georgia Laing results
BeforeAfter

Georgia Laing

Mind Core Fitness client

Mike Mortz results
BeforeAfter

Mike Mortz

Mind Core Fitness client

Georgia Laing results
BeforeAfter

Georgia Laing

Mind Core Fitness client

Mike Mortz results
BeforeAfter

Mike Mortz

Mind Core Fitness client

Real results

Hear it from them.

Cliffy Forsyth

1-2-1 training

George McKimm

1-2-1 training

Jan Beattie

1-2-1 training

Kirsty Duncan

1-2-1 training

Mike Mortz

1-2-1 training

Will Robson

1-2-1 training

Don't want to plan it yourself? Let Core Buddy do it.

Tell Core Buddy how long you've got and what kit you have, and it builds the whole session for you — every move timed, every exercise with a demo video. Built for beginners, free to download — and the 30-day free trial covers the lot.

Download on the App Store Get it on Google Play
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