New Study Shows Exercise Can Help Maintain Vitamin D Levels - Even Without Sunlight

New Study Shows Exercise Can Help Maintain Vitamin D Levels - Even Without Sunlight .

Winter in Sydney often means shorter days, less sunlight, and lower motivation to train outdoors. But exciting new research from the University of Bath, published in Advanced Science (May 2025), reveals that exercise alone can help preserve your body’s vitamin D levels throughout the winter months - even without supplements or weight loss.

For anyone in Sydney looking to stay fit, energetic, and resilient through winter, this is major news.

What the Study Found:

• Participants who exercised four times a week (treadmill walking, cycling, HIIT) had just a 15% drop in vitamin D over winter, compared to a 25% drop in non-exercisers.

  
  

• Exercise maintained the active form of vitamin D (1,25(OH)₂D₃), which supports bone strength, immunity, and organ health.

  
  

• No supplements were used, and participants didn’t lose weight - it was the exercise itself that protected their vitamin D levels.

What This Means for Sydney Locals

While Sydney gets more winter sun than other parts of the world, most people still spend their time indoors during the day - especially if they’re working 9-5. This reduces vitamin D production and can lead to fatigue, lowered immunity, and seasonal mood dips.

If you're feeling flat or tired by July, your vitamin D may be part of the reason. This new study confirms that a consistent, moderate-intensity exercise routine can protect your health naturally - no pills required.

The Power of Mobile Personal Training in Sydney

At Evidence Based Motion, we specialise in mobile personal training across Sydney’s Inner West and surrounds. We come to your home, local park, or apartment gym, making it easier than ever to stay consistent - especially in winter when motivation is lower.

✅ Train at home before or after work

✅ Get fresh air and natural light in a local park

✅ Avoid crowded gyms during flu season

✅ Work with university-qualified trainers who understand exercise science, not just fitness fads

Why Training Outdoors in Sydney Matters

Even short exposures to natural sunlight can help support vitamin D and improve mood. Our outdoor training sessions in Sydney parks combine functional movement, aerobic work, and resistance training - all designed to keep your body strong, your metabolism active, and your immune system supported.

Outdoor training in Sydney also offers proven mental health benefits:

• 🌿 Reduces anxiety and mental fatigue

• 🌞 Improves mood and alertness

• 🧠 Boosts cognitive performance and sleep quality

• 💬 Encourages real connection with your trainer and surroundings

  
  

Sydney’s Best Mobile Personal Trainers

We’re not your average trainers. At Evidence Based Motion, we use real metrics to design your program - from recovery markers to training intensity. We’re passionate about improving your health, strength, and resilience year-round using science, not guesswork.

Whether you're recovering from fatigue, managing stress, or wanting to avoid the winter slump, we’re here to help you move better, feel better, and stay healthier - with every session tailored to you.

Ready to Train Smarter This Winter?

📍 Serving Sydney’s Inner West and surrounding suburbs.

💼 Book a free discovery call to see how we can help you maintain your health and fitness through the colder months.

Let’s train where it counts - right where you are.

Evidence Based Motion - Mobile Personal Training Sydney

Where science meets movement at www.evidencebasedmotion.com

Journal Reference:

1. Oliver J. Perkin, Sophie E. Davies, Martin Hewison, Kerry S. Jones, Javier T. Gonzalez, James A. Betts, Carl Jenkinson, Mark A. Lindsay, Sarah R. Meadows, Damon A. Parkington, Albert Koulman, Dylan Thompson. Exercise without Weight Loss Prevents Seasonal Decline in Vitamin D Metabolites: The VitaDEx Randomized Controlled Trial. Advanced Science, 2025; DOI: 10.1002/advs.202416312

❓Frequently Asked Questions – Sydney Edition

What is a mobile personal trainer?

A mobile personal trainer is a fitness professional who travels to you - whether at home, a park, or your office. At Evidence Based Motion, our mobile personal trainers across Sydney deliver fully tailored workouts without the need for gym memberships.

How much should you pay for a personal trainer?

In Sydney, personal training costs typically range from $90 to $130 per session, depending on experience and location.

Is personal training 3 times a week enough?

Yes - training 2-3 times per week with one of our Sydney mobile trainers is ideal for most people to see consistent progress in strength, energy, and body composition.

Is it worth paying for a personal trainer?

Absolutely. If you value accountability, tailored programs, professional coaching, and reduced injury risk, then investing in a personal trainer is worth every dollar—especially one who comes to you.

How much does a PT cost in Australia?

The national average is $80–$110, but in Sydney, mobile personal trainers offering premium services usually charge between $100 and $140 per session. Evidence Based Motion offers university-qualified coaching at highly competitive rates.

Should I spend money on a personal trainer?

If you want expert guidance, faster results, and a more efficient way to reach your goals, then yes. We bring value to every session with custom planning, real data, and consistent progression.