Muscle Groups Guide: How to Train Every Muscle Effectively

Q: How many muscle groups should I train per workout?

For a full-body split, all 7 groups every session. For upper/lower, 3–4 groups per session. For push/pull/legs, 2–3 functionally related groups per session.

Q: Which muscle group needs the most training volume?

Back and legs generally benefit from the highest weekly volume (12–20 sets) because they contain multiple distinct sub-muscles.

Q: Can compound exercises train multiple muscle groups at once?

Yes. A single set of squats contributes to quads, glutes, core and lower back. Deadlifts contribute to back, glutes, hamstrings, and grip.

Q: Do I need to train calves and forearms directly?

Yes, they receive relatively little indirect stimulation from compound lifts. Include 2–4 direct sets per week if visible development matters.

Q: What is a lagging muscle group and how do I fix it?

A muscle group that underdevelops relative to the rest of your physique. Fix by increasing its volume 20–30% for 4–8 weeks and prioritising it first in your workout.

Q: Does training order matter for muscle group development?

Yes. Muscle groups trained earlier in a session, when freshest, generally receive higher-quality volume than those trained last.

Balanced muscular development requires understanding what each major muscle group does, which exercises train it most effectively, and how much weekly volume it needs to grow. This guide breaks down all 7 major muscle groups with practical programming guidance for each.

By the FitCalcHub Editorial Team — Updated September 2026 — 10 min read

The 7 Major Muscle Groups

Every effective training split — whether full body, upper/lower, or a push/pull/legs rotation — is built from these 7 major muscle groups. Understanding each group's function and best exercises lets you build (or evaluate) any programme with confidence.

Muscle Group	Best Exercises	Weekly Sets (Hypertrophy)
Chest	Bench press, incline dumbbell press, dips, cable fly	10–16
Back	Deadlift, pull-ups, barbell row, lat pulldown	12–20
Shoulders	Overhead press, lateral raise, rear delt fly	10–16
Arms	Barbell curl, tricep pushdown, hammer curl, dips	10–14 per muscle
Core	Plank, hanging leg raise, cable crunch, ab wheel	8–12
Glutes	Hip thrust, Romanian deadlift, squat, glute bridge	10–16
Legs (quads/hamstrings)	Squat, leg press, Romanian deadlift, leg curl	12–18

These weekly set ranges represent totals across all exercises targeting that muscle group, spread across 2–3 training days per week for optimal results. Note that compound lifts like the squat and deadlift contribute sets to multiple muscle groups simultaneously (e.g., squats count toward both legs and glutes).

Based on: Schoenfeld BJ, et al. "Dose-response relationship between weekly resistance training volume and increases in muscle mass." J Sports Sci. 2017;35(11):1073–1082. PubMed ↗

Push, Pull, and Legs: The Functional Categories

Beyond the 7 anatomical groups, muscles are often organised functionally for programming purposes: push (chest, shoulders, triceps — muscles that extend a limb away from the body), pull (back, biceps, rear delts — muscles that draw a limb toward the body), and legs (quads, hamstrings, glutes, calves). This is the basis of the popular push/pull/legs (PPL) split, which naturally groups synergistic muscles into the same training day, minimising interference between sessions and allowing higher frequency per group.

Optimal Weekly Volume Per Muscle Group

Research consistently shows a dose-response relationship between weekly sets and hypertrophy, up to a point of diminishing returns and eventually overtraining risk. For most trained lifters, 10–20 hard sets per muscle group per week produces near-maximal growth, with smaller muscle groups (arms, calves, core) needing less absolute volume than large groups (back, legs). Beginners should start at the lower end of these ranges (8–10 sets) and add volume gradually as recovery capacity improves — jumping straight to 20 sets per muscle group as a beginner typically produces excessive soreness without a corresponding growth benefit.

Volume should also be adjusted based on total training frequency. A muscle group trained once per week needs its full weekly volume in a single session (harder to recover from and often technically difficult to complete with quality); a muscle group trained twice per week can split that volume across two sessions, generally producing better quality per set and equal or superior growth.

Example Split Based on Muscle Groups

A 4-day upper/lower split, organised by muscle group, might look like:

Day 1 — Upper (push focus): Bench press, overhead press, tricep work, light back volume
Day 2 — Lower (quad focus): Squat, leg press, leg extension, calf raises
Day 3 — Upper (pull focus): Pull-ups, barbell row, rear delt fly, bicep work
Day 4 — Lower (hip-hinge focus): Deadlift or Romanian deadlift, hip thrust, leg curl, core

This structure trains every muscle group twice weekly (once as a primary focus, once as secondary volume within a related session), which research generally supports as more effective than once-weekly "bro splits" for most natural lifters. See our Full Body vs Split Training article for a deeper comparison of split structures.

To calculate the calorie and protein intake needed to support this training volume, use the TDEE Calculator and the Lean Body Mass Calculator — protein needs scale with lean mass, not total body weight, and higher training volumes generally require the higher end of the 1.6–2.2 g/kg protein range.

Based on: Schoenfeld BJ, et al. "Effects of resistance training frequency on measures of muscle hypertrophy: a systematic review and meta-analysis." Sports Med. 2016;46(11):1689–1697. PubMed ↗

Frequently Asked Questions

How many muscle groups should I train per workout?

For a full-body split, all 7 groups every session (3x/week). For an upper/lower split, 3–4 groups per session (4x/week). For a push/pull/legs split, 2–3 functionally related groups per session (3–6x/week). All structures work if weekly volume per muscle group falls in the 10–20 set range — the difference is how that volume is distributed across the week.

Which muscle group needs the most training volume?

Back and legs (quads/hamstrings) generally benefit from the highest weekly volume (12–20 sets) because they are large muscle groups made up of multiple distinct sub-muscles (lats, traps, rhomboids for back; quads, hamstrings for legs) that each need direct stimulation for complete development.

Can compound exercises train multiple muscle groups at once?

Yes — this is one of the main reasons compound exercises are prioritised in effective programming. A single set of squats contributes volume to quads, glutes, and (to a lesser extent) core and lower back. A single set of deadlifts contributes to back, glutes, hamstrings, and grip. This efficiency is why compound lifts should form the foundation of any muscle-group-based training split.

Do I need to train calves and forearms directly?

Calves and forearms respond to direct training more than most other muscle groups, since they receive relatively little indirect stimulation from compound lifts. If visible development in these areas matters to you, include 2–4 direct sets per week for calves (standing or seated calf raises) and forearms (wrist curls, farmer's carries) in addition to your main programme.

How long does it take to see noticeable muscle growth in a specific group?

Visible hypertrophy typically becomes noticeable after 8–12 weeks of consistent training with adequate volume, protein intake, and progressive overload, though initial "pump" and improved muscle definition can appear within 3–4 weeks due to improved muscle glycogen storage and reduced water retention as body composition improves.

Should beginners focus on all muscle groups equally?

Yes. Beginners benefit most from balanced, whole-body development rather than specialising in specific muscle groups. Specialisation phases (temporarily increasing volume for a lagging muscle group while maintaining others) are more appropriate for intermediate and advanced lifters who have already built a solid overall foundation.

What is a lagging muscle group and how do I fix it?

A lagging muscle group is one that visibly underdevelops relative to the rest of your physique despite consistent overall training. Common fixes: increase its weekly volume by 20–30% for 4–8 weeks (a "specialisation block"), prioritise it first in your workout when energy is highest, and ensure you are using a full range of motion and adequate mind-muscle connection on its key exercises.

Does training order matter for muscle group development?

Yes, to a meaningful degree. Muscle groups trained earlier in a session, when you are freshest, generally receive higher-quality volume than those trained at the end when fatigue is highest. If a specific muscle group is a priority, move its exercises to the beginning of your workout.

This article is part of our complete Strength Training Guide.

Medical Disclaimer: This article is general fitness education, not individualised training advice. Consult a healthcare provider or qualified strength coach before beginning a new training programme, particularly if you have existing joint or musculoskeletal conditions. Last reviewed: September 2026

Scientific References

Schoenfeld BJ, et al. "Dose-response relationship between weekly resistance training volume and increases in muscle mass." J Sports Sci. 2017;35(11):1073–1082. PubMed ↗
Schoenfeld BJ, et al. "Effects of resistance training frequency on measures of muscle hypertrophy: a systematic review and meta-analysis." Sports Med. 2016;46(11):1689–1697. PubMed ↗