5 Behaviors That Sabotage Fitness Progress

AS SEEN IN SOMERSET HILLS CITY LIFESTYLE MAY 2026: https://citylifestyle.com/articles/5-behaviors-that-sabotage-fitness-progress

Evidence-based lessons from my 7,000 hours of coaching clients.

After more than 7,000 hours coaching clients over the past several years, I’ve gained a powerful insight:  most people do not struggle with fitness progress because they lack motivation. They struggle because of a handful of everyday behaviors that quietly undermine their efforts.

Most people are genuinely trying to do the right things. But old habits, fear of injury or misunderstandings about how the body works can still hold them back.

The good news is that once people identify these behaviors, the solutions are often simpler than they expect.

Here are five patterns I see most often and some easy ways to overcome them.

The Under-Hydrated Lifter

I had a rock-star client who seemed to be doing everything right. She strength trained consistently, increased her weights over time and ate enough protein to support muscle growth. Yet week after week, her body composition scans showed no increase in muscle.

Eventually we discovered the issue. She was starting every workout dehydrated. After adjusting her hydration routine, her next body composition scan showed a noticeable increase in muscle.

Why this matters: Muscle is roughly 70 percent water, and hydration plays an important role in the cellular environment where muscle repair occurs. Research in physiology shows dehydration can shrink muscle cells and shift the body toward protein breakdown rather than protein synthesis.¹

Hydration may seem like a small detail, but it plays a major role in exercise performance, recovery and the body’s ability to respond to strength training.

What you can do

• Drink 16 to 24 ounces of water in the two hours before exercise. 

• Use a measured water bottle so you can track intake.

• Pair hydration with daily routines such as your commute or morning routine.

• For teens and athletes, send them out the door with a full bottle and a simple rule: finish one before practice begins.

Sometimes the smallest habit creates the biggest change.

The Morning Coffee Mistake

Another client struggled with fat loss despite exercising regularly and building impressive strength. After joining our perimenopause program, she began wearing a continuous glucose monitor and discovered an unexpected pattern. Her sweetened coffee creamer, consumed first thing in the morning before eating anything else, caused her blood sugar to spike dramatically and stay elevated for hours.

Whys this matters: Over time, repeated spikes like this can disrupt blood sugar regulation and increase the risk of insulin resistance, a common barrier to fat loss. This pattern often occurs when sugar or refined carbohydrates are consumed alone. Nutrition research shows pairing carbohydrates with protein, fat or fiber helps stabilize blood glucose levels and reduce spikes that can lead to cravings, fat storage and energy crashes later in the day.²

When she switched to a protein- and fiber-rich breakfast and a sugar-free creamer, her blood sugar stabilized and her daily food choices improved.

What you can do:

• Start the day with a protein-rich breakfast.

• Pair carbohydrates with protein or fiber in meals and snacks.

• Avoid beginning the day with sweetened foods or drinks on an empty stomach.

Your first meal often sets the metabolic tone for the rest of the day.

The “Heavy Enough” Illusion

One of the most common frustrations I hear from clients is: “I’m lifting weights three to four days a week, but I’m not seeing results.” When I looked more closely at one client’s workouts, the issue was not frequency but intensity. She attended strength classes three times per week, but the weights she used were not challenging enough to stimulate muscle growth.

Why this matters: Muscles must be progressively challenged, a principle known as progressive overload, in order to grow stronger and adapt.³ Movement alone is not enough. The muscle must be pushed beyond what it is accustomed to.

Some people worry heavier weights will lead to injury. In reality, when done with proper form and gradual progression, strength training with challenging weights is one of the safest and most effective ways to build muscle.

How to know if a weight is challenging enough:

• If, at the end of a set, you can easily complete five more reps, the weight is too light.

• The final few repetitions should feel difficult.

• When increasing weight, it is normal if you can only complete five to seven reps at first.

• By the end of a set, your muscles should feel fatigued.

Learn to recognize the difference between something feeling hard and something feeling painful. Hard is productive. Pain is a signal to stop.

The GLP-1 Muscle Problem

Medications such as GLP-1 therapies have helped many people achieve significant weight loss while improving markers of health such as blood pressure, cholesterol and blood sugar.

However, an important part of the conversation is often overlooked. Research shows up to 40 percent of weight lost during rapid weight loss can come from muscle mass.⁴

Several clients who began training with me after starting these medications had lost weight but also displayed signs of reduced muscle tone. They reported very low appetite and were eating small amounts of food without prioritizing protein.

Why this matters: Food is fuel. The body needs adequate carbohydrates, protein and healthy fats to build muscle and maintain bone density. Emerging clinical guidance emphasizes the importance of strength training, adequate protein intake and balanced nutrition while using GLP-1 therapies.⁵

The goal is not simply weight loss. It is maintaining a body that is strong, functional and metabolically healthy.

What you can do:

• Strength train two to three times per week.

• Prioritize adequate protein intake.

• Focus on balanced meals with protein, fiber and healthy fats.

Fat loss is only part of the health equation. Lean body mass, including bone and muscle, matters too.

Breaking the Craving Cycle

Perhaps the most common concern I hear from clients is this: “I have a lot of cravings.”

Cravings often feel powerful and out of our control. They are frequently linked to highly processed foods, carbohydrate-heavy meals or alcohol consumption.

However, something interesting happens when clients participate in structured nutrition programs that emphasize balanced meals, higher protein intake, fiber-rich foods and reduced sugar. After about two weeks, many report their cravings decrease significantly.

Why this happens: Science helps explain why. Cravings are often tied to hormonal signals that regulate hunger and blood sugar, not a lack of willpower.

Stable blood sugar, adequate protein intake and better sleep patterns help regulate these hormones. Once hormones stabilize, healthier choices become dramatically easier.

Ways to help stabilize hormones that influence cravings:

• Include 30 to 40 grams of protein with balanced carbohydrates and healthy fats in each meal.

• Reduce added sugars for at least two weeks.

• Prioritize sleep. For many people, getting around seven hours of sleep per night may help support healthy hunger hormone regulation.

The first week may be challenging, but most people are surprised how quickly things improve.

The Bigger Lesson

After thousands of hours working with clients, I have learned success rarely depends on extreme workouts or complicated diets. Instead, it comes down to understanding a few core principles: hydration, blood sugar balance, progressive strength training, balanced nutrition habits and proper sleep. When people understand these fundamentals and apply them consistently, the results can be remarkable.

At Infinitive Fitness Club, our goal is not simply to help people exercise. It is to help them understand their bodies, train intelligently and build strength that supports the life they want to live.

Because fitness is not just about working harder. It is about working smarter.

About the Author

Jennifer Baird is the founder of Infinitive Fitness Club in Basking Ridge. She holds a B.S. in biology from Northeastern University, an MBA from NYU Stern and certifications from the American College of Sports Medicine and Precision Nutrition. Over the past five years, she has accumulated more than 7,000 hours coaching clients, specializing in evidence-based strength training, nutrition coaching and long-term health.

References

1. Häussinger D. The role of cellular hydration in the regulation of cell function. Biochem J. 1996.

2. Ludwig DS. The glycemic index and obesity. JAMA. 2002.

3. Schoenfeld BJ. The mechanisms of muscle hypertrophy and their application to resistance training. J Strength Cond Res. 2010.

4. Wilding JPH et al. Once-weekly semaglutide in adults with overweight or obesity. N Engl J Med. 2021.

5. Garvey WT et al. Nutritional and lifestyle supporting care recommendations for management of obesity with GLP-1 therapies. Obesity. 2024.