Physical Exercise and Immunity: How Movement Strengthens the Body

Vitor — Tue, 02 Dec 2025 09:30:00 +0000

Keeping the immune system healthy is essential to protect the body against diseases, viruses and other agents that can compromise well-being. Among the various factors that influence this defence, physical exercise has received increasing attention. In addition to contributing to mental health and the prevention of cardiovascular problems, movement can play an essential role in how the body reacts to infections and adapts to different challenges throughout life.

Movement: the key to a stronger body

The relationship between physical exercise and immunity is increasingly studied and supported by evidence. Regular physical activity not only improves fitness and well-being, but can also help the immune system respond more effectively to infections, viruses, and other health threats.
Group and outdoor sports have become an essential part of the lifestyle of many people seeking health, prevention, and quality of life.

The impact of physical exercise on the body’s defences

Research suggests that regular exercise is associated with positive changes in the body, including effects on molecules and processes related to the immune system that may influence how the body responds to diseases and infections.

A study published in Nature (read here) and reported by Jornal Expresso (see here) and SIC Notícias (see article) reinforces this link. According to SIC Notícias (free translation), “scientists discovered that exercise affected thousands of molecules, with the most extreme changes occurring in the adrenal gland, which produces hormones that regulate many important processes, such as immunity, metabolism, and blood pressure.”

This result helps explain one of the possible mechanisms through which regular training benefits immune function and improves the body’s response.

Benefits for all ages and goals

Physical exercise is not reserved for athletes or those seeking high performance. Whatever your age, it is possible to adapt the intensity, type, and duration of the activity according to the recommendations of a doctor or qualified trainer.

Some of the main health benefits include:

Improved cardiovascular system
Reduced risk of chronic disease
Increased flexibility and strength
Decreased symptoms of shortness of breath and fatigue
Stronger acquired immunity
Enhanced well-being and mental health

Types of exercise that boost immunity

There is no single type of physical activity that is best for strengthening the immune system.

Several options can be adapted to the goals and comfort of each person:

Walking and light jogging – ideal for improving heart rate without excessive strain
Functional training – excellent for building strength, balance, and endurance
Stretching and yoga – help with injury prevention and mental health
Team sports – combine exercise with social interaction, supporting overall well-being

Care and attention to intensity

While regularity is key, it is essential to pay attention to training intensity. Excessive exercise without adequate rest can overload the body and temporarily weaken defences.

For a healthy lifestyle, it is recommended to:

Start gradually
Adjust heart rate to your experience level
Allow for rest periods
Consult a doctor before starting new activities
Set realistic, progressive goals

Movement is life

More than just a habit, physical exercise is an investment in life and in the body’s ability to face diseases and maintain health in balance.
Integrating physical activity into your daily routine – whether at home, outdoors, or in the gym – is one of the most effective ways to support the immune system and promote overall well-being.

Want to strengthen your immunity and achieve your goals safely?

At FBW, in Ajuda/Belém, you’ll find outdoor functional training, expert guidance, and a motivating environment. Try a class and discover your full potential!

FAQ – Physical Exercise and Immunity

1. What is the best frequency to train for stronger immunity?

How Long Does It Take to See Changes with a Personal Trainer?

Vitor — Thu, 09 Oct 2025 13:29:56 +0000

Suppose you’ve recently started a personalised training programme with a personal trainer in Lisbon, or you’re considering hiring one. In that case, it’s natural to wonder: “How long will it take to see results?”

The short answer? It depends.

The honest answer? Let’s have a proper chat about the human body, physical exercise, and everything that influences your physical development, so you know what to expect from a quality personal training programme.

The Timing of Results: Why There’s No Magic Formula

At FBW, we hear this question in almost every initial session. And we completely understand — if you’re starting a functional training program or a weight loss plan, you want to know you’re heading in the right direction.

However, here’s the thing: everyone has a different condition, a unique lifestyle, eating habits, stress levels, sleep routines, and even genetic predispositions. Giving a one-size-fits-all timeframe would be misleading.

What we can share is a realistic estimate, based on our professional experience with clients from Lisbon, in Ajuda, Belém, and other parts of the city.

Realistic Expectations (No Magic Promises)

Here’s a general idea:

2 to 4 weeks – You might notice small changes: more energy, better mood, a motivation boost, and sharper focus.
6 to 8 weeks – Your body begins to adapt. You’ll see improvements in your physical condition, stamina, and in some cases, weight.
3 to 6 months – Visible results in the mirror, in your habits, and your quality of life, whether your goal is to build muscle mass or lose weight.

However, remember that real and lasting results don’t come from the PT alone. It’s a team effort between the trainer and the client, built on consistency, commitment, and discipline.

Why Invest in a Personal Trainer?

Unlike many gyms, where you’re often on your own, a good personal trainer creates a plan that fits you. They consider your history, body, and specific goals — whether it’s gaining strength, improving mobility, losing weight, or fixing your posture.

At FBW, we offer outdoor sessions in fresh air, led by a professional team that supports you closely and adapts your plan as you progress—all of this with a strong focus on safety, motivation, and service quality.

What Influences the Speed of Results?

Let’s break down what truly matters:

Training frequency and consistency
Type of training (functional, strength, cardio…)
A proper and personalised diet
Stress levels and sleep quality
Age, metabolism, and injury history
Determination and mindset (this one’s on you!)

The Secret Is to Start — and Keep Going

Seeing progress takes time, but with the proper support, it will happen. A solid personal trainer is more than someone shouting “one more rep!” — they are a true professional who guides, encourages, and keeps you focused, based on real data, communication, and empathy.

If you’re based in Ajuda, Lisbon, and would like to learn more about our training services, please don’t hesitate to contact us. The first assessment session is free, and you’ll quickly feel the difference of having a plan built entirely around you.

Send us an email or visit us for more information. We’re here to help you reach your goals, with honesty, support, and a long-term focus on your well-being and your life.

FBW – Outdoor Functional Training in Ajuda/Belém, Lisbon.

More than just training, we create results with both feet on the ground and eyes on the future.

Personal Trainer – Full Body Workout