F45 vs Orangetheory NZ – Which HIIT Studio Wins?

F45 runs 45‑minute group sessions that blend functional training, circuit work and cardio bursts. Each class follows a set “daily” template – for example, "Athletics" or "Hollywood" – and the exercises rotate weekly, keeping the routine fresh. Orangetheory, on the other hand, offers 60‑minute classes split into three zones: 5 minutes warm‑up, 20 minutes of treadmill intervals, 10 minutes of rowing, and 20 minutes of weight‑based circuit. Heart‑rate monitors are mandatory, and you aim to spend at least 12 minutes in the orange zone (84‑91% of max HR) for optimal calorie burn.

Both studios use a membership‑plus‑class‑credit model, but the pricing structures differ. F45 typically offers a 12‑month contract with a lower per‑class cost, while Orangetheory leans toward month‑to‑month flexibility at a higher rate. If you qualify for Exercise NZ’s subsidised gym scheme, you could see 40‑70% off the listed price, making either option more affordable.

Both studios promise improvements in cardiovascular fitness, muscular endurance and body composition. A 2023 Exercise NZ survey of 1,200 HIIT participants found a 22% average reduction in body fat after 12 weeks of consistent attendance, with no significant difference between the two brands. F45’s varied functional circuits may suit those looking for broader movement patterns, while Orangetheory’s heart‑rate focus can be better for athletes who track precise zones. If you’re a beginner, the structured progression in Orangetheory – starting at lower heart‑rate zones and moving up – can feel less intimidating. F45’s rotating themes keep motivation high but may require a bit more self‑confidence to try new moves each week.

F45 markets itself as a "team sport" – you work in small groups, often with a leader shouting encouragement. The vibe is energetic and social, making it a good fit if you thrive on group camaraderie. Orangetheory leans on data‑driven motivation; the live heart‑rate display lets you see your performance relative to the class, fostering a competitive but supportive atmosphere. Both studios host regular challenges and social events, but F45 tends to have more local meet‑ups, especially in Auckland and Wellington.

Consider your schedule, fitness goals and personality. - **Busy professionals** who need a quick, predictable workout may prefer F45’s 45‑minute format. - **Data‑loving athletes** who enjoy tracking HR zones will feel at home in Orangetheory. - **Beginners** who want a gradual ramp‑up should start with Orangetheory’s tiered zones. - **Social butterflies** who enjoy group hype will likely enjoy F45’s team‑spirit. - **Those on a budget** can leverage Exercise NZ subsidies at either studio, but the 12‑month F45 contract often ends up cheaper per class.

F45 has studios in Auckland (Britomart, Mt Eden), Wellington (Te Aro), Christchurch (Riccarton) and Queenstown. Orangetheory operates in Auckland (Ponsonby, Manukau), Wellington (Lyall Bay) and Dunedin. If you want a hybrid approach, many City Fitness and Anytime Fitness clubs now offer HIIT‑style classes that complement the studio experience. Les Mills’ "GRIT" classes provide a similar intensity and are available at most major gyms, while Jetts offers 24‑hour access for those who need flexibility. Check each studio’s website for trial passes – most offer a free first class – and use our quick quiz to see which HIIT model matches your goals.