3 Common Mistakes Women Over 40 Make When Trying to Get Fit and Build Muscle

For many women, turning 40 brings a shift—not just in lifestyle, but in how the body responds to exercise, nutrition, and recovery. If you’ve found yourself working harder but not seeing the same results, it’s not a lack of effort.

More often, it comes down to approach.

Building muscle and getting fit after 40 is absolutely achievable. In fact, it can be one of the most empowering phases of your fitness journey. But there are a few common mistakes that can quietly hold you back.

1. Prioritising Cardio Over Strength Training

Cardio has long been seen as the go-to for fat loss and general fitness, and while it does have benefits for heart health and endurance, it shouldn’t be the main focus—especially if your goal is to build muscle.

As we age, we naturally begin to lose muscle mass (a process known as Sarcopenia). Strength training helps counteract this by preserving and building lean muscle, which in turn supports metabolism, bone density, and overall strength.

If most of your workouts revolve around long cardio sessions, it may be time to rebalance your routine. Incorporating resistance training 3–4 times per week can make a noticeable difference in both how your body looks and how it feels.

2. Not Eating Enough Protein—or Enough Food Overall

One of the biggest barriers to building muscle is under-fuelling the body.

Many women over 40 still approach nutrition with a “less is more” mindset, often eating too little in an attempt to lose weight. But building muscle requires adequate energy and, importantly, enough protein.

Protein provides the building blocks your body needs to repair and grow muscle tissue. Without it, even the most consistent training plan will fall short.

Instead of focusing solely on cutting calories, aim to nourish your body. Including a good source of protein with each meal—such as eggs, fish, lean meats, dairy, or plant-based options—can support muscle growth and improve recovery.

3. Overlooking Recovery and Rest

Pushing harder isn’t always the answer.

Recovery becomes increasingly important with age, as the body may take longer to repair and adapt after workouts. Skipping rest days, getting poor sleep, or constantly feeling stressed can all impact your progress.

Muscle isn’t built during your workout—it’s built afterwards, when your body has time to recover.

Prioritising quality sleep, scheduling rest days, and managing stress levels are all essential parts of a well-rounded fitness routine. These elements don’t slow you down—they help you move forward more effectively.

A Smarter Approach to Fitness After 40

The key takeaway is simple: fitness after 40 isn’t about doing more—it’s about doing what works.

By shifting your focus toward strength training, fuelling your body properly, and allowing time for recovery, you create an environment where muscle growth and long-term health can thrive.

You’re not starting from scratch—you’re building with more knowledge, awareness, and intention than ever before.

And that’s a powerful place to be.