Workout Wednesday: The Difference Between Training for Strength and Training for Size

Here is something that confuses a lot of people when they first start lifting.

Are you training to get stronger or training to get bigger? And is there even a difference?

The short answer is yes and no. Strength and muscle size are connected. Building one tends to build the other. But how you train, the rep ranges, the weight, the structure of your workouts, shifts depending on which one you are emphasizing.

Here is what you actually need to know.

The Core Difference

Training for size, which is what bodybuilding style programs focus on, is built around creating a burn and a pump in the muscle. You are working to break down the muscle fibers enough that they rebuild bigger. This typically involves three to four sets per exercise at around ten to twelve reps with moderate weight.

Training for strength is built around moving as much weight as possible. The focus is on the nervous system adapting to heavier loads rather than purely on muscle breakdown. This involves lower rep ranges, typically three to six reps per set, with heavier weight and longer rest periods between sets.

The key thing to understand is that they are not mutually exclusive. Lifting heavier with fewer reps, between one and five, is most effective for muscular strength. Anything from five to forty reps works well for muscle growth, but for practical reasons, six to fifteen reps per set is ideal If you follow a bodybuilding program you will likely get stronger over time. If you follow a strength program you will likely build muscle. Both paths lead to both outcomes. You are just leaning into one more than the other.

What a Strength Program Actually Looks Like

The most well known beginner strength programs, like Starting Strength and StrongLifts 5x5, are built around the same basic structure.

Three days a week. The big three compound lifts squat, bench press, and deadlift as the foundation. Low rep ranges of three to five reps per set. Heavy weight. And a focus on adding a small amount of weight every single session.

Strength training prioritizes compound exercises, lifting heavy weights in low rep ranges, and regular progression. A solid guideline is to train each muscle group at least two days per week, with at least one rest day between sessions training the same muscles.

The simplicity is the point. A small number of exercises done consistently and progressively over time produces remarkable results.

What a Size Program Actually Looks Like

Bodybuilding style training looks structurally very different.

More exercises per session. More sets. Higher rep ranges of eight to twelve. More total volume across the week. The splits we have covered in previous posts, Push Pull Legs and the bro split, are the most common frameworks.

The weight is lower than a pure strength program but the total amount of work done is significantly higher. The goal is to keep the muscle under tension long enough and with enough volume to stimulate growth.

A 2024 meta-regression confirmed that while more weekly sets lead to more muscle growth, there are diminishing returns. For beginners, a starting target of eight to twelve total working sets per major muscle group per week is a productive range

Rest Periods Are Different Too

This is one of the most practical differences between the two approaches.

With strength training, rest longer between sets. You are putting serious stress on your nervous system with heavy loads and you need time to recover before the next set. If you do an extra heavy set of squats or deadlifts you might genuinely need four or five minutes before you are ready to go again. You will know when you need more time. Listen to your body.

With size training, keep rest periods shorter. Sixty to ninety seconds between sets is a common target. Shorter rest periods keep the muscles more active, maintain the pump, and provide the adequate amount of muscle breakdown needed for growth.

Can You Do Both at the Same Time

Absolutely. And this is actually what I do personally.

My workouts are primarily bodybuilding style. But on back day, chest day, and leg day I incorporate the deadlift, bench press, and squat using the pyramid method I described in the previous post. I do the heavy strength work first when my muscles are fresh, work up to a challenging weight through pyramid sets, and then go into the rest of my workout doing eight to twelve rep sets for each exercise.

It is not a pure strength program or a pure size program. It is a hybrid that lets me get stronger on the big lifts while still doing the volume work that builds muscle everywhere else.

If you want to try this approach, always do the heavy compound work first. Attempting a heavy deadlift after your muscles are already tired from twenty sets of accessory work is not the move.

Does Nutrition Change Based on Your Goal

The fundamentals of eating well apply to both goals. Enough protein. Enough food to fuel your training. Eating around your workouts.

The main difference is that muscle building programs generally benefit from being in a slight caloric surplus, meaning eating a little more than you burn, to give your body the raw material it needs to build new muscle tissue. Pure strength training can produce results even in a caloric deficit because strength gains are driven significantly by nervous system adaptations rather than just muscle growth.

For most beginners the difference is minor. Eat well, eat enough protein, and fuel your workouts. Both goals will benefit from those basics.

Switching Between the Two

If you have been training for size and want to shift to strength, or the other way around, do not overthink it.

You are still lifting. That is the main thing. If you switch from a strength program to a bodybuilding style routine you might notice that some of your top end strength numbers dip slightly since you are lifting lighter more often. But lifting for size builds strength and building strength builds size. The two are connected enough that switching approaches does not undo what you have already built. It just shifts the emphasis.

Which Should a Beginner Start With

Honestly, either works. But if I had to recommend one starting point for a complete beginner, I would lean toward a size focused approach.

The higher rep ranges give you more time under load to learn the movements. You are not jumping to heavy weight before your form is solid. And if you can only do ten reps with five pound dumbbells right now, that is completely fine. That is where you start.

Lifting can be a pain in the ass, literally, to get into as a habit. It takes time. It is physically demanding. But regular exercise is one of the best things you can do for your health, and whether you are starting because you want to be stronger, look bigger, or some combination of both, you are making a great choice.

If pure strength is your goal, start slow. Master the form. Build the movement patterns before you start chasing heavy numbers. Attempting a 300 pound deadlift the first week is asking for trouble. Be patient. Take your time. Try to enjoy it.

The Bottom Line

There is no goal that is better than any other.

Building strength and building muscle are both worthy pursuits. They overlap more than most people realize. And whichever path you choose, the act of showing up and doing the work consistently is what actually moves the needle.

It is about feeling good. Feeling strong. And building something you are proud of.

That is always the right goal.

We are the underdogs. We don't stay down, we bite back.