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HOW EXERCISE CHANGES YOUR BODY, MIND AND… GENETICS?
We exercise for all sorts of reasons. Some do it feel good in their bodies, some feel it improves their mental health or stress management abilities, and others take part in exercise to lose weight or improve their health. All of these reasons are great, but we’re about to add another fantastic reason to keep your body moving – it literally changes the molecules in the human body that influence how genes behave.
Sounds crazy right? Let’s dig into the research…

YES, YOUR TRAINING CAN ALTER YOUR GENETIC RISK OF DISEASE
Have you ever heard the expression “your genetics load the gun, your lifestyle and environment pull the trigger”? It’s true! We are all born with genetics that influence our likelihood of developing certain diseases or chronic health conditions like heart disease, type 2 diabetes and stroke. It was once thought that this was unable to be changed – that you were just more likely to develop certain health issues and that was that. But research now shows that exercise and general activity levels can alter the way these genes express, reducing your likelihood of developing conditions that you are genetically predisposed to get at some point.

A study of identical twins (who obviously share identical sets of DNA) confirmed this, with the activity levels of each twin shown to alter which diseases they got over their lifetime. The study suggests that markers of metabolic disease are strongly influenced by how a person interacts with their environment as opposed to just their inherited genetics.
So that’s awesome news – all of us taking part in exercise regularly are less likely to develop serious disease! But what about how genetics play into the other results we get from exercise?

DO MY GENETICS INFLUENCE HOW MY BODY RESPONDS TO TRAINING?
You may have noticed that everyone responds differently to exercise – of course, some of that is down to type of exercise, consistency, intensity and how well our nutrition and recovery processes support our desired outcome. But largely our body’s response to exercise is down to our genetics.

Some of us naturally develop muscle more easily or are naturally more lean – our genetics also determine where we store fat (that’s why you can’t “burn fat” off only your stomach or arms or hips). Genes can determine which type of exercise you’re better at (like strength or cardio). This doesn’t mean that it’s impossible to change your body shape or to improve your strength or fitness because of some genetic predisposition. It just means in some areas you may have to work a little harder than others!

For best results, the basics remain the same for everyone (regardless of body type and genetics):

taking part in regular strength and cardiovascular training for healthy muscle mass and strong heart
keeping active day to day with 6,000-10,000 steps
drinking 1.5-2.5 litres of water daily
eating 2 serves of fruit and 5 serves of vegetables, along with wholegrains, lean protein, healthy fats like avocado, nuts and olive oil
aiming for 7-9 hours of quality sleep a night
strength training for beginners in Altona North
coached strength and conditioning session Altona
December 17, 2025
Why strength training matters in your 30s, 40s & 50s. Evidence-based benefits for strength, function, bone health, and longevity.
Your guide to Strength Training after a long break
By Gabriel Leutz December 9, 2025
Walking into a gym after months or years away from structured exercise can feel overwhelming. You're not alone in feeling this way, and more importantly, that feeling of gym intimidation doesn't mean you don't belong there. It means you're human. If you're in your 30s, 40s, or 50s and considering returning to fitness, you're actually in the perfect position to build something sustainable. This isn't about recapturing who you were at 25—it's about becoming the strongest, most capable version of yourself right now. Why Gym Intimidation Is Completely Normal (And Why It Doesn't Define You) Gym intimidation affects nearly 50% of people returning to exercise after a long break, according to fitness industry research. It's particularly common among people aged 35-49 who are juggling careers, families, and the physical changes that come with aging. Here's what most people don't realize: that intimidation isn't about the gym itself. It's about the gap between where you are and where you think you "should" be. You're comparing your chapter one to someone else's chapter twenty. The truth? Everyone in that gym started somewhere. The person lifting heavy weights once struggled with an empty barbell. The person running on the treadmill once got winded walking up stairs. Your starting point is valid, and it's exactly where you're meant to begin. The Real Reason You're Feeling Intimidated (It's Not What You Think) Most people assume gym anxiety comes from fear of judgment. While that's part of it, the deeper issue is usually a lack of clarity. When you don't know: What exercises to do How to use the equipment properly Whether you're doing it "right" How to modify movements for your body What realistic progress looks like ...of course you feel intimidated. Uncertainty breeds anxiety. This is why education-focused gyms that prioritize the "why" behind training create such different experiences. When you understand what you're doing and why it matters, confidence replaces intimidation naturally. 5 Proven Strategies to Build Fitness Confidence From Day One 1. Start with a structured program, not random workouts Fitness confidence grows from seeing measurable progress. Random workouts don't provide that. A 12-week structured program with progressive overload gives you clear benchmarks and visible improvement, which builds genuine confidence faster than any motivational quote. 2. Focus on what your body can do, not what it looks like Shift your metric for success. Instead of "Do I look different?" ask "Can I do more than last week?" Strength training for beginners over 40 should prioritize functional capacity—lifting your groceries easier, playing with your kids without back pain, climbing stairs without getting winded. 3. Ask questions (there are no stupid ones) Quality coaching means having someone who explains the "why" behind every exercise. If you're wondering why you're doing something, ask. If a movement doesn't feel right, speak up. This isn't school—there's no grade for figuring it out alone. 4. Track your progress beyond the scale Weight is one data point, but it's not the whole story. Track your energy levels, how your clothes fit, your strength improvements (weights lifted, reps completed), and your consistency (sessions per week). These paint a much clearer picture of your progress. 5. Give yourself permission to modify Every body is different, and every training history is unique. Modifications aren't failures—they're intelligent training. A good coach will help you scale movements to match your current capacity while still challenging you appropriately. What to Expect When Starting Strength Training After a Long Break Let's set realistic expectations, because unrealistic ones kill motivation faster than anything else. Week 1-2: You'll likely feel sore (DOMS—delayed onset muscle soreness). This is normal and will decrease as your body adapts. You might feel awkward with movements. Also normal. Your body is relearning patterns. Week 3-4: Soreness decreases significantly. Movements start feeling more natural. You'll notice small strength improvements—not because you've built significant muscle yet, but because your nervous system is getting more efficient at recruiting muscle fibres. Week 5-8: This is where real confidence builds. You're lifting heavier than week one, movements feel natural, and you start to feel genuinely capable. Energy levels typically improve noticeably here. Week 9-12: Visible changes start appearing. Muscle definition, fat loss, improved posture. More importantly, you've built a habit. Exercise is now part of your routine, not something you're "trying." The key insight: Progress isn't linear. Some weeks you'll feel amazing. Others, you'll feel tired or stuck. This is normal human physiology, not a reflection of your effort or potential. Why Strength Training Is the Best Choice for Long-Term Results If you're returning to exercise after years off, you might be wondering: why strength training specifically? Here's the science: after age 30, we lose approximately 3-8% of muscle mass per decade. This accelerates after 60. This muscle loss (sarcopenia) is directly linked to decreased metabolic rate, increased injury risk, reduced bone density, and loss of independence in later years. Strength training is the only form of exercise that directly counteracts this process. It builds muscle, increases bone density, improves metabolic health, and enhances functional capacity for daily life. For people in their 40s and 50s, strength training isn't just about aesthetics—it's about maintaining independence, vitality, and quality of life for decades to come. How to Choose the Right Gym When You're Starting Over Not all gyms are created equal, especially when you're overcoming gym intimidation and starting fresh. Here's what to look for: Coaching qualifications and experience: Look for coaches with formal qualifications and significant experience. Combined decades of experience across a coaching team means they've seen every body type, injury history, and fitness level. Personalized programming within group settings: The best value comes from gyms that offer group training with individualized modifications. Education-focused approach: If a gym just tells you what to do without explaining why, you'll never build independent fitness knowledge. Appropriate class sizes: Smaller classes (capped around 12-16 per coach) ensure you get proper attention and form correction. Progress tracking systems: Gyms that track your body composition, strength progress, and attendance demonstrate they care about your results. Trial period or challenge programs: Quality gyms offer ways to test the experience before committing long-term. Location and convenience: A gym that's 5 minutes from home will always win over a "perfect" gym that's 30 minutes away. You're Not Starting Over—You're Starting Smarter Here's the advantage you have now that you didn't have in your 20s: perspective. You understand that quick fixes don't work. You value sustainability over intensity. You're willing to invest in doing things properly. Gym intimidation fades when you realize the gym isn't a place for perfect people—it's a place where people become stronger versions of themselves. Every rep, every session, every week you show up, you're building not just muscle, but confidence, capability, and a foundation for the next chapter of your life. The best time to start was ten years ago. The second best time is today. If you're in Melbourne's west and ready to start strength training with expert coaching, structured programming, and a community that understands exactly where you're starting from, we'd love to meet you. At Altona North Training, we specialize in helping people aged 35-55 return to fitness with confidence, education, and sustainable results.
A close up of a dumbbell on a black surface.
By Gabriel Leutz February 26, 2024
Feeling thrown off by all these long weekends and school holidays and social events? Never fear, we have some tricks to motivate you to get back into the gym! You want to keep to your training schedule. You have the best intentions at the start of every week – but somehow that long term consistency is eluding you. How do we kick start our motivation, and when it starts to fade, hold onto it? Here’s some proven tips and tricks for you to try… Reward yourself If you want to step up your motivation to train consistently, consider dangling a very big carrot in front of yourself – a beautiful handbag, a fancy dinner out, a spa treatment, a nice watch… pick something you’ve wanted for a while. Then set a training schedule (2-4 sessions a week) and at the end of each week if you’ve completed the sessions, put aside some cash for your reward. You can scale this kind of reward up or down – try putting 1 or 2 dollars in a jar after each session and using it to buy yourself lunch after a few weeks, or go all out and book a holiday and use that date as motivation for achieving your fitness goals. Join forces with a friend You’ve heard it time and time again – because it’s true! If you team up with a partner, friend or colleague to hit the gym, you are much more likely to stick to it. You can keep each other accountable, remind each other of why you’re there, and complain about your sore muscles together over a coffee. To make this even more effective, check in with your workout buddy at least once a week to see how they’re doing – lift them up when they’re not feeling it and they’ll do that for you too. Commit to a challenge Committing to a set period of training with specific goals to achieve can help kick start your efforts and get you in the routine of working out regularly. This is a great idea for those who want to keep themselves on track but don’t necessarily have a set idea of exactly what they’d like to focus on with their fitness. Chat to one of our Big 5 coaches aboutour upcoming challenges if you’re keen to get motivated! Working through set tasks as part of a group gives you a sense of community and connection, and establishes an instant support network for any positive changes you’d like to make going forward. Plus, competing against others or as part of a team can make exercise feel more like a game or a social activity rather than something you “have to do”. Remember, to stick to training for the long term, you need to enjoy it! The more you enjoy something, the less it’s going to feel like a chore.