October 23, 2025

4-Day Strength Split: 16-Week Plan for a Leaner, Stronger You | push/pull/legs and core

By Will Duru, BSc (Hons) Sport and Exercise Science, Award-winning Personal Trainer with over 10 years of experience in strength training and optimising recovery

As a personal trainer with over a decade of experience in strength training and recovery, I’ve seen countless fitness trends come and go. But one method has consistently delivered incredible results for my clients: the push/pull/legs-and-core training split, combined with Zone 3 cardio. This program is a surefire way to shed body fat and build lean muscle, and I’m going to share with you a 16-week plan that will get you in the best shape of your life.

Build muscle, lose fat , get stronger, and follow smart gym workouts with 12REPS.

The Power of the Push/Pull/Legs and Core Split

The push/pull/legs and core split is a simple yet highly effective way to organise your training. It involves dedicating specific days to pushing movements (like bench press and shoulder press), pulling movements (like rows and pull-ups), leg exercises, and core work. This approach allows you to train your entire body over the course of the week while giving each muscle group ample time to recover and grow. When you combine this with Zone 3 cardio, you create a powerful fat-burning and muscle-building machine.

My Client Ciro’s Transformation

Let me tell you about my client, Ciro. Like many people, Ciro gained some weight during the COVID-19 lockdown. He was already familiar with the gym but lacked consistency. He came to me with a clear goal: to get back in shape and build a sustainable training habit. We implemented the very program I’m about to share with you, and the results were astounding. Ciro lost 10kg of body fat and built significant strength, all while developing a consistent gym routine that he enjoys. Ciro was training 3 times per week before, but this program requires 4 training days per week with proper rest days in between.

The 16-Week Program

This 16-week program is designed to progressively challenge you, ensuring you continuously make progress. It’s divided into four 4-week phases. Each workout begins with a 10-minute warm-up, such as an incline walk on a treadmill or 10 minutes of rowing, followed by mobility stretches. Each workout ends with a 10-minute cool-down, like a session on the StairMaster or an incline walk.

Warm-up and Mobility

Before each workout, perform the following mobility routine:

Exercise

Sets

Reps/Duration

Cat-Cow

2

10 reps

World’s Greatest Stretch

2

5 per side

Hamstring Stretch

2

30 sec per side

The Workouts

Here is the breakdown of the 4-day split:

  • Day 1: Push (Chest, Shoulders, Triceps)
  • Day 2: Pull (Back, Biceps)
  • Day 3: Legs (Quads, Hamstrings, Glutes, Calves) & Functional
  • Day 4: Core & Cardio

Now, let’s get into the details of each phase.

Phase 1: Weeks 1-4 (Foundation Building)

Day 1: Push (Chest, Shoulders, Triceps)

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Dumbbell Bench Press

4

12

Moderate

90 seconds

Incline Dumbbell Press

4

12

Moderate

90 seconds

Dumbbell Shoulder Press

4

12

Moderate

90 seconds

Lateral Raises

4

12

Light

60 seconds

Tricep Rope Pushdown

4

12

Moderate

60 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 2: Pull (Back, Biceps)

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Lat Pulldown

4

12

Moderate

90 seconds

Seated Cable Row

4

12

Moderate

90 seconds

Single Arm Dumbbell Row

4

12

Moderate

60 seconds

Face Pulls

4

15

Light

60 seconds

Barbell Bicep Curl

4

12

Moderate

60 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 3: Legs & Functional

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Trap Bar Deadlift

4

10

Moderate

120 seconds

Goblet Squat

4

12

Moderate

90 seconds

Hip Thrust Machine

4

12

Moderate

90 seconds

Box Jumps

4

10

Bodyweight

90 seconds

Sledge Push

4

20m

Moderate

90 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 4: Core & Zone 3 Cardio

Warm-up: 10 minutes incline walk on treadmill or rowing

Zone 3 Cardio:

Exercise

Duration

Intensity

Notes

Treadmill Run

30-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR Watt Bike

30-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR StairMaster

30-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR Elliptical

30-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

Core Workout:

Exercise

Sets

Reps/Duration

Rest Period

Russian Twists

4

20 reps

45 seconds

Bicycle Crunches

4

20 reps

45 seconds

Leg Raises

4

12 reps

45 seconds

Mountain Climbers

4

30 seconds

45 seconds

Side Plank (each side)

4

30 seconds

45 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Phase 2: Weeks 5-8 (Strength Building)

Day 1: Push (Chest, Shoulders, Triceps)

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Barbell Bench Press

4

10

Heavy

120 seconds

Incline Dumbbell Press

4

10

Heavy

90 seconds

Seated Dumbbell Press

4

10

Heavy

90 seconds

Cable Lateral Raises

4

12

Light

60 seconds

Close-Grip Bench Press

4

10

Heavy

90 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 2: Pull (Back, Biceps)

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Pull-ups (Assisted if needed)

4

8-10

Bodyweight

120 seconds

Barbell Row

4

10

Heavy

120 seconds

Lat Pulldown (Wide Grip)

4

12

Moderate

60 seconds

Reverse Fly Machine

4

15

Light

60 seconds

EZ Bar Curl

4

10

Heavy

60 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 3: Legs & Functional

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Trap Bar Deadlift

4

8

Heavy

150 seconds

Back Squat

4

10

Heavy

120 seconds

Hip Thrust (Barbell)

4

12

Heavy

90 seconds

Box Jumps

4

12

Bodyweight

90 seconds

Sledge Push

4

30m

Heavy

120 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 4: Core & Zone 3 Cardio

Warm-up: 10 minutes incline walk on treadmill or rowing

Zone 3 Cardio:

Exercise

Duration

Intensity

Notes

Treadmill Run

35-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR Watt Bike

35-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR StairMaster

35-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR Elliptical

35-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

Core Workout:

Exercise

Sets

Reps/Duration

Rest Period

Weighted Russian Twists

4

25 reps

45 seconds

Hanging Knee Raises

4

12 reps

45 seconds

Ab Wheel Rollout

4

10 reps

45 seconds

Plank to Push-up

4

12 reps

45 seconds

Side Plank with Hip Dip

4

10 per side

45 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Phase 3: Weeks 9-12 (Hypertrophy Focus)

Day 1: Push (Chest, Shoulders, Triceps)

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Dumbbell Bench Press

5

10

Heavy

120 seconds

Incline Barbell Press

5

10

Heavy

120 seconds

Machine Shoulder Press

5

10

Heavy

90 seconds

Cable Lateral Raises

4

15

Light

60 seconds

Tricep Dips (Weighted)

5

10

Heavy

90 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 2: Pull (Back, Biceps)

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Weighted Pull-ups

5

8

Heavy

120 seconds

Pendlay Row

5

10

Heavy

120 seconds

Cable Row (Wide Grip)

4

12

Moderate

90 seconds

Straight Arm Pulldown

4

15

Light

60 seconds

Preacher Curl

5

10

Heavy

60 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 3: Legs & Functional

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Trap Bar Deadlift

5

6

Very Heavy

180 seconds

Front Squat

5

10

Heavy

120 seconds

Barbell Hip Thrust

5

10

Heavy

120 seconds

Box Jumps

4

15

Bodyweight

90 seconds

Sledge Push

4

40m

Heavy

120 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 4: Core & Zone 3 Cardio

Warm-up: 10 minutes incline walk on treadmill or rowing

Zone 3 Cardio:

Exercise

Duration

Intensity

Notes

Treadmill Run

40-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR Watt Bike

40-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR StairMaster

40-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR Elliptical

40-45 min

Zone 3 (70-80% max HR)

Maintain steady pace

Core Workout:

Exercise

Sets

Reps/Duration

Rest Period

Weighted Decline Sit-ups

4

15 reps

45 seconds

Hanging Leg Raises

4

12 reps

45 seconds

Cable Woodchop

4

12 per side

45 seconds

Dead Bug

4

15 reps

45 seconds

Plank with Shoulder Tap

4

20 taps

45 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Phase 4: Weeks 13-16 (Peak Performance)

Day 1: Push (Chest, Shoulders, Triceps)

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Barbell Bench Press

5

8

Very Heavy

150 seconds

Incline Dumbbell Press

5

8

Very Heavy

120 seconds

Barbell Overhead Press

5

8

Very Heavy

120 seconds

Dumbbell Lateral Raises

5

15

Light

60 seconds

Close-Grip Bench Press

5

8

Heavy

120 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 2: Pull (Back, Biceps)

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Weighted Pull-ups

5

6

Very Heavy

150 seconds

Barbell Row

5

8

Very Heavy

150 seconds

T-Bar Row

5

10

Heavy

120 seconds

Face Pulls

4

20

Light

60 seconds

Barbell Curl

5

8

Heavy

90 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 3: Legs & Functional

Warm-up: 10 minutes incline walk on treadmill or rowing

Exercise

Sets

Reps

Weight

Rest Period

Trap Bar Deadlift

5

5

Maximum

180 seconds

Back Squat

5

8

Very Heavy

150 seconds

Barbell Hip Thrust

5

8

Very Heavy

120 seconds

Box Jumps

5

15

Bodyweight

90 seconds

Sledge Push

5

50m

Maximum

150 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Core Finisher:

Exercise

Sets

Reps/Duration

Rest Period

Plank

4

45 seconds

30 seconds

Flutter Kicks

4

45 seconds

30 seconds

Decline Sit-ups

4

10 reps

30 seconds

Day 4: Core & Zone 3 Cardio

Warm-up: 10 minutes incline walk on treadmill or rowing

Zone 3 Cardio:

Exercise

Duration

Intensity

Notes

Treadmill Run

45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR Watt Bike

45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR StairMaster

45 min

Zone 3 (70-80% max HR)

Maintain steady pace

OR Elliptical

45 min

Zone 3 (70-80% max HR)

Maintain steady pace

Core Workout:

Exercise

Sets

Reps/Duration

Rest Period

Weighted Russian Twists

5

30 reps

45 seconds

Toes to Bar

5

10 reps

45 seconds

Ab Wheel Rollout

5

12 reps

45 seconds

Plank with Leg Lift

5

20 lifts

45 seconds

Side Plank (Weighted)

5

45 seconds

45 seconds

Cool-down: 10 minutes on StairMaster or incline walk

Nutrition is Key

Remember, you can’t out-train a bad diet. To maximise your results, you need to fuel your body with the right nutrients. Focus on increasing your intake of lean protein, healthy fats, and complex carbohydrates. I recommend using an app like MyFitnessPal to track your macronutrients and ensure you’re hitting your targets. Aim for a protein intake of 1.6-2.2 grams per kilogram of bodyweight to support muscle growth and repair. You also need to adjust your fat and carbohydrate intake based on your activity level and goals.

Why Strength Training and Zone 3 Cardio Work Together

Combining strength training with Zone 3 cardio is the most effective way to lose body fat and build muscle. Strength training builds lean muscle mass, which increases your metabolism and helps you burn more calories at rest. Zone 3 cardio, which is performed at 70-80% of your maximum heart rate, is a moderate-intensity exercise that burns fat while preserving muscle. This combination creates a powerful synergy that transforms your body composition.

Track Your Progress with the 12Reps App

To get the most out of this program, I highly recommend using the 12Reps app. You can build this entire routine within the app by navigating to “Build Your Routine” and selecting all the exercises from this workout program. The app allows you to track your workouts, monitor your rest periods with the built-in stopwatch, save your workouts, and even plan sessions with friends. The app is designed to be your ultimate strength training companion, helping you stay motivated and on track. You can download it for a free trial and experience the difference it makes.

strength training app

Final Thoughts

This 16-week program is a proven method for losing body fat and building muscle. It worked for Ciro, and it can work for you. The key is consistency, proper nutrition, and tracking your progress. Remember to listen to your body, adjust the weights as needed, and stay committed to the process. With dedication and the right tools, you’ll achieve the results you’ve always wanted.

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12Reps Team

The 12reps app is your ultimate fitness companion, crafting tailored workout plans, tracking your progress, and keeping you motivated every step of the way. Whether you’re at home, in the gym, or on the go, our adaptable approach fits seamlessly into your lifestyle — providing the support and guidance you need to crush your goals and stay on track.
4-Day Strength Training Split: The Ultimate 16-Week Program for Fat Loss and Muscle Gain

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