Explainer, in strength training
What Is Training Frequency? Simply Explained
In strength training, training frequency is precisely defined as the number of times a specific muscle group, lift, or movement pattern is stimulated through resistance exercise over a set duration, most commonly measured on a weekly basis.
4 questions. Published Mar 11, 2026. Updated Oct 19, 2026. By AI Fit Hub.
Definition
Training Frequency
In strength training, training frequency is precisely defined as the number of times a specific muscle group, lift, or movement pattern is stimulated through resistance exercise over a set duration, most commonly measured on a weekly basis.
Why it matters
Frequency is a tool for fitting in volume, not a growth driver on its own. When weekly volume is equal, training a muscle once, twice or three or more times a week builds similar muscle (Schoenfeld 2019), and strength gains are similar too (Grgic 2018). Higher frequency helps when it lets you do more total sets with good quality.
How it works
Frequency counts how often a muscle or lift is trained in a set period, usually a week: chest trained Monday and Thursday means a chest frequency of two. After a heavy session, muscle protein synthesis stays raised for about a day and a half (MacDougall 1995), which is one reason splitting volume across sessions is popular. But the meta-analyses show the total weekly volume matters more: once volume is equal, frequency makes little difference to growth (Schoenfeld 2019).
Example
Comparing Two Strength Training Programs for Hypertrophy
Program A: Full Body Training
3 sessions per week (Monday, Wednesday, Friday)
Program A: Chest Training Frequency
3 times per week (Chest worked in each full body session)
Program B: Body Part Split
4 sessions per week (Monday: Chest/Triceps, Tuesday: Back/Biceps, Thursday: Legs/Shoulders, Friday: Chest/Triceps)
Program B: Chest Training Frequency
2 times per week (Chest worked on Monday and Friday)
Program A trains chest three times a week and Program B twice, even though B has more gym days. If both programmes do the same weekly chest volume, the evidence predicts similar chest growth (Schoenfeld 2019); A's advantage is shorter chest sessions, not more muscle.
Key takeaways
Training frequency directly affects how often your muscles receive a growth stimulus.
With weekly volume equal, frequency makes no meaningful difference to muscle growth (Schoenfeld 2019) or strength (Grgic 2018).
Use frequency to fit in the weekly volume you need with good-quality sets; choose the split you prefer.
Related terms
Run the numbers next
- Strength Progressive Overload Planner
Project lifting progression with weekly overload and planned deload cycles.
- Strength Workout Volume Calculator
Calculate total training volume and compare against optimal ranges per muscle group.
Questions people ask next
How often should I train a muscle group for optimal results?
Whatever lets you complete your weekly volume with good-quality sets. The 2019 meta-analysis of 25 studies concluded that, for a given volume, people can choose their weekly frequency per muscle based on personal preference (Schoenfeld 2019). Twice a week is a common middle ground, and higher frequencies help when one session can no longer hold all the sets without quality dropping.
Does training frequency apply only to strength training?
While most commonly discussed in strength training, the concept of frequency applies broadly to any physical activity. For cardiovascular training, frequency refers to how many times per week you engage in cardio sessions. For flexibility, it's how often you stretch. Even in skill-based sports, frequency relates to how often you practice specific movements or drills. The underlying principle remains the same: regular, consistent exposure to a stimulus is important for adaptation and improvement in any physical domain.
Is higher training frequency always better for muscle growth?
Not on its own. Without equal volume, studies favoured higher frequencies modestly, because more sessions usually meant more total sets; when volume was equal, frequency made no significant difference to hypertrophy (Schoenfeld 2019) or to strength (Grgic 2018).
How does training frequency relate to workout volume?
Frequency and volume are linked: 12 sets for chest can be done in one session or spread over three. When total weekly volume is equal, the frequency does not significantly change muscle growth (Schoenfeld 2019), so the main reasons to spread volume out are session length, set quality and recovery between sessions.
Sources
- How many times per week should a muscle be trained to maximize muscle hypertrophy? A systematic review and meta-analysis of studies examining the effects of resistance training frequency , Journal of Sports Sciences (2019) — Schoenfeld, Grgic & Krieger
- Effect of Resistance Training Frequency on Gains in Muscular Strength: A Systematic Review and Meta-Analysis , Sports Medicine (2018) — Grgic et al.
- The time course for elevated muscle protein synthesis following heavy resistance exercise , Canadian Journal of Applied Physiology (1995) — MacDougall et al.