Investigated
Does resistance training beat HIIT for muscle?
Short answer
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For building muscle and maximizing strength, resistance training is the clearer specialist tool: a small controlled study found substantially greater leg-press gains than running HIIT, while a meta-analysis found concurrent HIIT and resistance training produced similar hypertrophy but slightly lower lower-body strength. HIIT remains useful for fitness and can complement resistance work, but it does not consistently beat focused resistance training for muscular development.
The views on this question
Two lenses on the same evidence. Source weight and the primary source ratio show what each rests on.
Alternative
Source weight 44%A broader reading treats “muscle” as more than size or one-repetition maximum. HIIT-style resistance circuits and combined programs may deliver useful strength, body-composition, and fitness outcomes efficiently, especially for people whose main constraint is time. The evidence does not show that HIIT universally loses; it shows that results depend on the protocol and target.
- HIIT-style resistance training has been studied as a time-efficient alternative to traditional resistance programming, reflecting a practical challenge in exercise adherence.
- Some resistance-based HIIT protocols can improve strength and body composition while also targeting aerobic power, so “best” depends on the desired combination of outcomes.
- Combined HIIT and resistance training can improve cardiorespiratory fitness more than HIIT alone in young women with overweight or obesity.
- Concurrent training’s hypertrophy results can remain comparable to resistance training alone, weakening the claim that adding HIIT necessarily prevents muscle growth.
- Different HIIT modalities may matter: the meta-analysis reported a trend toward greater lower-body-strength interference with cycling than running.