5 ab-sculpting workouts that can build core strength in the gym, according to personal trainers - Yahoo Sports

Gym machines can help you build strong ab muscles with weights and resistance more efficiently than bodyweight crunches, according to trainers.

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Wonder Core Total Body Ab Toning Workout Smart Strength Fitness Trainer Exercise

Maximise your core strength with one dumbbell and this standing ab workout

Forget sit-ups — this 10-minute standing ab workout builds real strength

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How to get sculpted abs using just bodyweight, no heavy weights necessary - Yahoo Sports

What is the Stomach Vacuum? Benefits of the Isometric Ab Exercise

The best exercises for abs at home, according to an expert personal trainer

These Men Swear By the '5-3-1' Workout Method for Bigger Muscles: 'I Love This Program

Forget sit-ups — this seated ab workout sculpts your core in 5 minutes

The 12 Best Ab Exercises to Build Core Strength

Core Complete Workout - Laminated Chart / Workout Poster - Strength & Cardio Training - Core - Abs - Abdominal - Oblique - Build Muscle - Tone & Tighten - Core Training - 18x24: Becky Swan: 9781773290119: Books