Official exercise guidance from the Centers for Disease Control and Prevention says adults need at least two sessions of weight training each week for overall health. But if you’ve ever searched for a structured workout program, you might have noticed they often only offer plans with three or four sessions a week. Because there’s a difference between doing the minimum for general health and training with a specific goal, like building muscle, says Alex McBrairty, CPT.
Public health guidelines establish a baseline, while structured programs are designed to maximize progress. Training three or four days a week can make that progress easier, since it allows you to spread out your total workload and avoid cramming everything into long, exhausting sessions. But you don’t necessarily need more days in the gym to see progress, says Brooke Taylor, CPT.
What really matters is completing enough total work—extra training days are just one way to make that happen. So, can you really build muscle with just two strength workouts per week? The short answer is yes, but it’s a bit nuanced.
Meet the Experts: Brooke Taylor, CPT, is a certified personal trainer, creator of the Brooke Taylor Fit App, and owner of Taylored Fitness NY LTD. Alex McBrairty, CPT, is a certified personal trainer and founder of A-Team Fitness. You can actually build muscle with just two workouts per week.
In fact, McBrairty says training frequency, or how many days you work out, doesn’t meaningfully impact muscle growth as long as your total weekly workload is the same. Research backs it up, too. A 2021 review in Sports Medicine found it’s possible to see gains by training anywhere from one to four days per week so long as you’re getting in at least four sets of six to 15 reps per muscle group a week—so long as you’re training close to failure (within two to three reps of it).
Even lower frequencies can still be effective. A 2023 meta-analysis published in the British Journal of Sports Medicine reported that any resistance-training program, regardless of frequency or rep schemes, led to meaningful muscle growth compared to not working out at all. So, at its core, the recipe for muscle growth is pretty straightforward: consistently challenge your muscles with enough resistance, then give them time to recover.
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