28-Days-to-Lean Meal Plan

With a structured plan and unwavering discipline, one can achieve a highly defined physique in just 28 days.

Swedish social media influencer Ida Bergfoth exemplifies the principle that while abdominal definition is primarily revealed through nutritional choices, the muscles themselves are forged in the gym. “Trust me—you’ll thank me later,” Bergfoth, a fitness enthusiast with a focus on muscle growth, shared in a recent Instagram post with her 1.4 million followers.

The highly fit Bergfoth currently resides in Los Angeles, where she runs her online coaching venture Team IBFIT. Given workouts of this caliber, it is clear why the brunette fitness professional has cultivated a multi-million-follower audience across her social media channels. For those seeking a challenging abdominal workout to integrate into their routine, this concise four-exercise core circuit will deliver intense metabolic and muscular stimulus to the midsection.

As temperatures decline and holiday preparations begin, winter approaches—but the renowned personal trainer emphasizes that this is no reason to halt training. “Let’s get going,” she urges. “Bodies are built during the winter months! Do not slow down—accelerate.”

Try this abdominal circuit for yourself:

• Hanging Side Raises — 3 sets × 6–10 reps

• Bench Plank Leg Dips — 3 sets × 8–12 reps

• Incline Reverse Sit-Ups — 3 sets × 8–12 reps

• Weighted Sit-Ups — 3 sets × 10 reps (or aim for 30 consecutive crunches)

“I hope this workout helps you tap into deep core strength and witness visible abdominal definition,” the Swedish fitness personality encourages. Importantly, effective abdominal training extends beyond mere repetitions. “Focus on engaging your core fully and controlling each movement from the abdomen,” Bergfoth advises. “Avoid arching the lower back and ensure no uncontrolled, momentum-driven repetitions.”

For additional workout inspiration, follow Ida Bergfoth on Instagram.