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Exercise for Weight

New Zealand has one of the highest obesity rates among OECD countries, with around 1 in 3 adults being obese. Regular exercise and a healthy diet are key to managing weight. While a calorie deficit is essential for weight loss, exercise plays a crucial role in maintaining weight loss and overall health. In this article, we will explore the importance of exercise for weight management, which gym formats burn the most calories, and provide practical steps you can take to get started.

By Benjamen Updated July 2026 5 min read

NZ Obesity Rates and Weight Management

According to the Ministry of Health, around 34% of New Zealand adults are obese, which can lead to various health problems such as diabetes, heart disease, and certain types of cancer. Exercise is a crucial component of weight management, as it helps create a calorie deficit, builds muscle, and improves overall health. Research suggests that a combination of aerobic exercise and resistance training is most effective for weight loss and maintenance.

Calorie Deficit vs Exercise

Some gym formats, such as HIIT (High-Intensity Interval Training) and group fitness classes, can be effective for burning calories and creating a calorie deficit. These types of workouts often combine aerobic exercise with strength training, making them a great option for those looking to lose weight and improve overall fitness.

Gym Formats that Burn the Most Calories

Certain gym formats are more effective for burning calories than others. For example, HIIT workouts, such as Les Mills GRIT or CrossFit, can burn up to 700-1000 calories per session. Other high-calorie-burning gym formats include spinning classes, boot camp, and kickboxing. It's essential to find a workout that you enjoy and can stick to in the long term, as consistency is key to successful weight management.

Realistic Expectations and Getting Started

To get started, find a gym that offers a variety of workout options, including group fitness classes and personal training. Many gyms in New Zealand offer free trials or introductory memberships, which can be a great way to try out a new gym and see if it's right for you.

Next Steps

Now that you know the importance of exercise for weight management, it's time to take action. Compare gyms and find a programme that works for you. You can also take our quiz to determine which type of workout is best for your fitness goals and preferences.

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NZ Gym Chains β€” Full Reviews

Snap Fitness NZ

24/7 access, no lock-in contracts, $14–$18/week. Full pricing and what members say.

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From $14.95/week, 24/7 keyfob access, 40+ NZ locations. Is it worth it?

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Global access included, around $20/week. Great for frequent travellers.

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City Fitness NZ

Best value full-service gym in Wellington, Auckland & Christchurch. From $12.90/week.

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Les Mills NZ

Premium clubs with pools, world-class group fitness. $30–$38/week. Worth the price?

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