When first starting with resistance training, many people follow advice from online influencers or mimic the routines of more experienced gym friends. While there's nothing inherently wrong with either approach (provided the routine is safe), there are important considerations that can help you achieve better results in the long run.
Most traditional training programs are organized around body part splits:
Leg day
Back day
Chest day
Arms/shoulders day
Abs day
There are countless ways to organize your training, and most are viable depending on your specific context—including training goals, experience level, and personal preferences. However, beginners should approach these splits with caution due to several factors .
If you're following the routine of a friend who has been training consistently for years while you're just getting started, there's a significant experience gap to consider. This difference isn't just about your skill level with exercises but also how muscles adapt over time, which affects:
Recovery between sessions
Total work capacity within a session
Most body part splits involve multiple exercises per muscle group, typically with 3-4 sets of 10-12 repetitions per exercise at a moderately challenging weight. This training volume can be excessive for untrained muscles. Remember: more work doesn't necessarily mean better results when you are starting out. Doing more than necessary will only increase fatigue and soreness, potentially reducing your training consistency and how much effort you can put into sessions. There is also the risk of developing overuse injuries like tendonitis. Tendons adapt like any other tissue and they need gradual introduction to exercise to avoid getting inflamed too!
The more sustainable approach for many new exercisers is to expose muscles to the minimum amount of stress necessary to stimulate growth, then build on that foundation as progress slows over time. This is more easily done with total body workouts as opposed to the more volume heavy body part splits. When you're first starting out, you likely need less gym time than you might think:
An effective full-body resistance training workout might only take 30-40 minutes
Include just one exercise per muscle group to start
Use challenging weights with appropriate sets and repetitions (i.e. pick a weight where you could do 2-3 more reps if you had too at the end of the set)
Remember, this is working smarter and doing less work doesn’t mean ‘lazy’ or ‘uncommited’ like you may hear from some overzealous influencers online, it’s sustainable and it protects your quality of life outside of the gym.
Now let’s talk about how to progress from that minimum stress once you stop seeing results (always double check diet and stress levels first when this happens). Let's say you begin with three full-body resistance training sessions per week, using one exercise per muscle group at three sets of ten repetitions (with approximately three repetitions in reserve). How should you progress from there?
Adding an entire extra training day might be too drastic at first. Instead, consider a more gradual approach:
Add one extra set for a single muscle group in each workout
Monday: Extra set for legs (4 sets for legs, 3 for chest, 3 for back, 3 sets for shoulders, 3 sets for arms, etc.)
Wednesday: Extra set for chest (3 sets for legs, 4 for chest, 3 for back, 3 sets for shoulders, 3 sets for arms, etc.)
Friday: Extra set for back (3 sets for legs, 3 for chest, 4 for back, 3 sets for shoulders, 3 sets for arms, etc.)
After a few weeks, add an extra set for two muscle groups per session
Monday: Extra set for legs and back (4 sets for legs, 3 for chest, 4 for back, 3 sets for shoulders, 3 sets for arms, 3 sets for abs, etc.)
Wednesday: Extra set for chest and shoulders (3 sets for legs, 4 for chest, 3 for back, 4 sets for shoulders, 3 sets for arms, 3 sets for abs, etc.)
Friday: Extra set for arms and abs (3 sets for legs, 3 for chest, 3 for back, 3 sets for shoulders, 4 sets for arms, 4 sets for abs, etc.)
Eventually, all your sessions will include an extra set compared to your starting point and that is your new baseline.
As you can see, this allows you to gradually increase the amount of work being done without spiking it. To take the example a step further, you might add a fourth day that's either shorter or focuses on a particular muscle group you want to develop (glutes, chest, arms, etc.). We could sit here and give examples all day, but we can always revisit progression in a future article.
Body part splits become more appropriate as you advance in your training. They allow experienced lifters to:
Stack multiple exercises per muscle group in a single session
Apply greater training volume to specific muscle groups which increases the total tension on that muscle resulting in greater growth
Manage fatigue more effectively for muscle groups being targeted by isolating the work on a given muscle group to a day or two of training with plenty of recovery between sessions.
Time management is another factor for using body part splits. Imagine trying to do 3-4 exercises per muscle group in a full-body workout with uniform quality and effort across all exercises—you'd be at the gym forever! For the average person, the quality of your repetitions would decline as fatigue accumulated before even reaching the half-way point. Too much work beyond your current capacity takes a much longer time to fully recover from between sessions which could undermine your progress for the entire week.
Muscle responds primarily to mechanical tension, with total training volume being a key proxy in estimating that tension. Training volume refers to the total sets and repetitions performed, often further quantified by total tonnage which includes the weight (weight × reps × sets) across all exercises in the session.
For example:
Bench press: 100 lbs × 10 repetitions × 3 sets = 3,000 pounds of total tonnage
When viewed this way, imagine several exercises with their tonnage calculated applied to a specific muscle. When quantifying how much work is being done, it gives a clear picture of how much work is actually being done and why beginners might want to limit themselves to one or two exercises per muscle group per session when first starting out. Spreading this volume across multiple full-body sessions offers several advantages for the beginner:
Reduced soreness and fatigue
Greater consistency in training (less sessions missed due to excessive soreness/fatigue)
Lower likelihood of feeling perpetually sore
Full-body sessions offer another significant advantage for beginners: flexibility. When you're first establishing an exercise routine, you're more likely to miss occasional sessions. With full-body workouts:
Sessions are easier to reschedule within the week
Missing a single session doesn't mean neglecting an entire muscle group
You avoid the problem of placing a high-fatigue session (like a makeup leg day) next to another challenging workout
This prevents the accumulated fatigue that can lead to burnout and reduced performance across multiple sessions.
Just because experienced lifters and influencers have been training with consistent body part splits for years doesn't mean that's where you should start. If you can start that way and find it sustainable, great! For everyone else, begin with full-body training to build a foundation, then gradually progress toward more specialized splits as your experience, recovery capacity, and goals evolve.
Remember that sustainable progress is a much better idea than training too hard, getting burnt out and quitting. Start where you are, not where others are. Exercise does not have a bottom threshold of effectiveness, meaning anything you do to start will yield benefit so long as you progress over time as your body adapts.
Looking for a place to start? We have a beginner template program that gives you a basic training schedule to follow with lessons, videos, and hand-outs to help you understand how to build your own sessions and programs.
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Chris Bigelow has been in higher education for over ten years teaching at Bryan University in Tempe, AZ teaching personal trainers the science behind their craft. He has also been involved in personal training for much of that time helping individuals achieve their health and fitness goals.