Optimal Health Daily - Fitness and Nutrition 3079: LISS vs HIIT: Which Approach Is Better For Fat Loss? by Eric Leija on What is the Most Effective Cardio Workout
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Aug 10, 2025 Dive into the debate between LISS and HIIT for fat loss, where speed meets sustainability. HIIT promises quicker results and a metabolic boost, but can become a dreaded chore. Meanwhile, LISS offers steady endurance gains while preserving muscle, making it more enjoyable for some. The key takeaway? Consistency trumps intensity—choose the workout you love to stick with, ensuring long-term health and fitness success.
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How LISS And HIIT Differ
- LISS repeats the same movement at moderate heart rates for longer durations.
- HIIT alternates near-max effort bursts with rest and finishes in far less time.
HIIT Delivers Faster VO2 Gains
- HIIT raises aerobic fitness much faster than LISS in many studies.
- A study found 2 weeks of HIIT matched 6–8 weeks of LISS for VO2 max gains.
Bodybuilders' Cardio Strategy
- LISS usually preserves muscle better during calorie-restricted phases.
- Bodybuilders prefer LISS before competitions to avoid fatiguing recovery and muscle loss.