Why Undereating Can Make You Gain Weight | Fitness Coach Explains Calorie Deficit Mistakes (2026)

Undereating for weight loss? Think again. While it might seem counterintuitive, excessive calorie restriction can actually hinder your weight loss journey and make weight gain easier. This is according to Chennai-based fitness coach Raj Ganpath, who has 18 years of experience and is the founder of the Slow Burn Method. In an Instagram video, he highlights three key reasons why undereating can be a problem.

The Cycle of Overeating

One of the main issues with undereating is that it creates a significant calorie deficit, leaving your body deprived of essential energy and nutrients. As a result, your body responds by increasing hunger and cravings, which can lead to overeating. Ganpath explains that many people focus on the periods of undereating while neglecting the times they compensate with excessive eating. This cycle can be difficult to break, leaving you confused about why you're not losing weight despite your efforts.

Less Movement, More Weight Gain

When you consistently eat very little, your body enters an energy-conservation mode. This means you may unknowingly move less throughout the day, even if your workout routine remains unchanged. Ganpath notes that this subtle decline in everyday movement can reduce your overall energy expenditure without you realizing it. Your body is protecting you by conserving energy, which can lead to weight gain over time.

Drop in Basal Metabolic Rate

Excessive calorie restriction can also cause a drop in your basal metabolic rate (BMR). BMR is the number of calories your body burns at rest to sustain essential life functions. When you drastically cut calories and move less, your BMR adapts to these low levels of movement and fueling. This makes it incredibly hard to create a calorie deficit and very easy to create a calorie surplus. Even modest overeating can lead to weight gain, as your body adjusts to the new energy intake.

The Takeaway

Ganpath emphasizes that while calorie restriction is necessary for weight loss, excessive undereating is counterproductive. He recommends smart, mindful eating to achieve both short-term and long-term weight loss goals. Remember, your body is a complex system, and extreme dieting can disrupt its natural balance. Listen to your body, adjust your calorie intake, and prioritize overall health and well-being.

Why Undereating Can Make You Gain Weight | Fitness Coach Explains Calorie Deficit Mistakes (2026)

References

Top Articles
Latest Posts
Recommended Articles
Article information

Author: Kerri Lueilwitz

Last Updated:

Views: 6131

Rating: 4.7 / 5 (47 voted)

Reviews: 86% of readers found this page helpful

Author information

Name: Kerri Lueilwitz

Birthday: 1992-10-31

Address: Suite 878 3699 Chantelle Roads, Colebury, NC 68599

Phone: +6111989609516

Job: Chief Farming Manager

Hobby: Mycology, Stone skipping, Dowsing, Whittling, Taxidermy, Sand art, Roller skating

Introduction: My name is Kerri Lueilwitz, I am a courageous, gentle, quaint, thankful, outstanding, brave, vast person who loves writing and wants to share my knowledge and understanding with you.