How many days per week should I strength train?
How Many Days a Week
Should I Strength Train?
The honest, research-backed answer — and why the number you choose changes everything about your results.
- Post 1 — Why Strength & Power Should Be Your #1 Priority
- Post 2 — Strength & Power: The Prime360 Way
- Post 3 — How Many Days a Week Should I Train? (you are here)
- Post 4 — Metabolism 101 (coming soon)
We Hear This All The Time
“I just don’t have the time.”
It’s the most common thing we hear at Prime360. And honestly? We get it. Life is full. Work is demanding. Family comes first. The last thing you need is a coach making you feel guilty about your schedule.
So let’s have an honest conversation — not about what’s perfect, but about what’s true. Because the number of days you train each week is one of the most important decisions you can make for your results. And the research is really clear on this one.
The Honest Breakdown
Here’s how training frequency actually maps to results — based on peer-reviewed research, not gym logic.
1 Day a Week: Better Than Nothing. Not Enough to Grow.
One day a week of strength training counts. It’s infinitely better than zero. But research comparing training frequencies is consistent: training a muscle group twice per week produces superior gains in muscle mass compared to once per week.
Once a week keeps the engine running. It doesn’t build a bigger one.
If once a week is where you are right now — that’s okay. We meet you there. But we’d be doing you a disservice if we didn’t tell you the truth: you’re in maintenance mode, not progress mode. Think of it like watering a plant once a week in the middle of summer. It survives. It doesn’t thrive.
2 Days a Week: Real Progress Starts Here.
Two days a week is where the game changes. A systematic review found that performing strength training 2–3 times per week was sufficient to produce significant strength gains — even with a single working set per session. The American College of Sports Medicine recommends 2–3 days per week for healthy adults as the foundation for optimum strength development.
Two days isn’t a compromise. It’s a real starting point. You will get stronger. You will see changes. It just takes a little longer than three days would. For clients who are juggling a lot — two days is a win worth celebrating. And it’s the foundation we build from.
3 Days a Week: The Sweet Spot.
If you can get to three days, this is where the real results happen.
Research comparing 2 versus 3 days per week found similar adaptations when total weekly volume was equal — but three days gives you more opportunity to accumulate that volume, more practice with movement patterns, and more frequent stimulus for your muscles to respond to.
Three days per week is the Prime360 default. It hits the sweet spot of enough frequency to drive consistent adaptation, enough recovery time to come back strong, and realistic enough to actually stick to long term.
Three days is not a starting goal. It’s the target. If you’re currently at two days, this is the conversation we want to have with you.
4 Days a Week: Great — If the Volume Backs It Up.
Four days a week works really well, especially as you get more experienced. The National Strength and Conditioning Association recommends 3–4 days per week for intermediate trainees. The key here is that frequency alone isn’t the driver — the total work you do across the week is what matters most.
Four sessions of half-effort won’t beat three sessions of full effort. More days only help when more quality work fills them.
5+ Days a Week: For Competitive Athletes.
Five or more days of strength training per week is the territory of competitive athletes and advanced trainees. Research shows that when volume is equated between groups training at different frequencies, the additional days don’t produce meaningfully better results.
You’re not leaving gains on the table by stopping at three or four. You’re being smart about recovery. More is not always more. Sometimes more is just more tired.
Here’s What We Tell Every Client
We will always meet you where you are. One day? We’ll make it count. Two days? We’ll build something real. Three days? Now we’re talking.
But here’s the honest truth from a coaching perspective — most people who come in once or twice a week tell us they want more results. And most of the time, the results they’re looking for are sitting on the other side of one more session per week.
Not two more hours a day. Not a complete life overhaul. Just one more hour. One more session. That’s usually the difference between maintaining and transforming.
So What Should You Do?
Here’s a simple starting point based on where you are right now:
- Schoenfeld BJ, et al. “Resistance training frequency and skeletal muscle hypertrophy.” ScienceDirect. 2018.
- Ralston GW, et al. “The Minimum Effective Training Dose Required to Increase 1RM Strength in Resistance-Trained Men.” PubMed. 2019. PMID: 31797219.
- American College of Sports Medicine. “Progression Models in Resistance Training for Healthy Adults.” Med Sci Sports Exerc. 2009.
- Colquhoun RJ, et al. “Similar Muscular Adaptations in Resistance Training Performed Two Versus Three Days Per Week.” PMC. 2018. PMC6724585.
- National Strength and Conditioning Association. Resistance Training Frequency Guidelines by Training Status.