How much can you transform your torso in just four weeks? A lot – so long as you follow this 16-session training plan to the letter. It’s been designed to work your chest and back muscles twice a week – which means your biceps and triceps also get a double whammy of workload – to completely push these major muscle groups outside their comfort zone so your body has no option but to repair the damage by building a bigger, stronger and more defined body. You’ll also hit all your other major muscles, including your legs, to increase your fat-burning potential so you can get bigger and leaner – fast.

How the plan works
In each of the four weeks of this 28-day plan you will train your chest and back twice. Sound like a lot? It is! But in some plans you only hit each muscle group every seven days, which isn’t enough of a stimulus to force your body into making positive physique adaptations.

But in this plan, doubling up each week on chest and back exercises – and therefore also working your biceps and triceps twice a week, once directly and once indirectly – will provide all the stimulus your body needs to get bigger in less time. And fear not, your shoulders, abs and legs won’t miss out on the size and strength gains: they will still get enough dedicated time each week to allow them to grow bigger and stronger.

Simply do the workouts in order, sticking to the exercises, sets, reps, tempo (see below) and rest periods detailed. The first workout of each week targets your chest and triceps, the second your back and biceps, the third your legs and chest, and the fourth your back and shoulders.

All four weekly workouts are made up of five moves, which you’ll perform as straight sets, so you’ll simply work through moves 1 to 5 in order. That’s it!

Workout 2: Back And Biceps
1 Pull-up
Superset workout one: 1B Pull-up
Sets 5 Reps 6-10 Tempo 2011 Rest 60sec

Hold a pull-up bar with an overhand grip, hands shoulder-width apart. Brace your core, then pull yourself up until your lower chest touches the bar. Lower until your arms are straight again.

2 Bent-over row

Sets 5 Reps 10 Tempo 2010 Rest 60sec

Hold a barbell using an overhand grip, hands just outside your legs, and lean forward from the hips. Bend your knees slightly and brace your core, then pull the bar up, leading with your elbows. Lower it back to the start.

3 Chin-up
Chin-up
Sets 3 Reps 6-10 Tempo 2011 Rest 60sec

Hold a pull-up bar with hands shoulder-width apart, palms facing you. Brace your core, then pull yourself up until your chin is over the bar. Lower until your arms are straight again.

4 Standing biceps curl
Dumbbell biceps curl
Sets 3 Reps 12-15 Tempo 2011 Rest 60sec

Stand with dumbbells by your sides, palms facing forwards. Keeping your elbows tucked in, curl the weights up, squeezing your biceps at the top. Lower them back to the start.

5 Seated incline curl

Sets 3 Reps 12-15 Tempo 2011 Rest 60sec

Sit on an incline bench with dumbbells by your sides, palms facing forwards. Keeping your elbows tucked in, curl the weights up, squeezing your biceps at the top. Lower them back to the start.

Workout 3: Legs And Abs
1 Back squat
Barbell back squat
Sets 5 Reps 10 Tempo 2010 Rest 60sec

Stand tall, holding a bar across the back of your shoulders. Keeping your chest up and core braced, squat down as deep as you can. Drive back up through your heels to return to the start.

2 Good morning
Barbell good morning
Sets 5 Reps 10 Tempo 2010 Rest 60sec

Stand tall holding a light barbell across the backs of your shoulders, feet shoulder-width apart. With your core braced, bend forwards slowly from the hips, as far as your hamstrings allow but not past horizontal. Return to the start.

3 Glute bridge
Glute bridge
Sets 3 Reps 12-15 Tempo 2011 Rest 60sec

Sit with your upper back supported on a bench, holding a barbell across the tops of your thighs. Thrust your hips up, squeeze your glutes at the top, and then return to the start.

4 Incline dumbbell press
Incline dumbbell bench press
Sets 3 Reps 12-15 Tempo 2110 Rest 60sec

Lie on an incline bench, holding a dumbbell in each hand by your shoulders. Press the weights up until your arms are straight, then lower them back to the start under control.

5 Incline dumbbell flye
Incline dumbbell flye
Sets 3 Reps 12-15 Tempo 2111 Rest 60sec

Lie on an incline bench, holding a dumbbell in each hand above your face, with your palms facing and a slight bend in your elbows. Lower them to the sides, then bring them back to the top.

Workout 4: Back And Shoulders
1 Overhead press
Overhead press
Sets 5 Reps 10 Tempo 2010 Rest 60sec

Hold a bar in front of your neck with your hands just wider than shoulder-width apart. Keeping your chest up and core braced, press the bar overhead until your arms are straight. Lower it back to the start.

2 Rack pull

Sets 5 Reps 10 Tempo 2111 Rest 60sec

Stand tall in front of a barbell resting on safety bars at knee height. Bend and grasp the bar with an overhand grip, then stand up until your back is straight again, squeezing your shoulder blades together at the top.

3 Seated dumbbell press
Seated dumbbell shoulder press
Sets 3 Reps 12-15 Tempo 2010 Rest 60sec

Sit on an upright bench with a dumbbell in each hand at shoulder height. Keeping your chest up, press the weights directly overhead until your arms are straight, then lower them back to the start.

4 Lateral raise
Dumbbell lateral raise
Sets 3 Reps 12-15 Tempo 2011 Rest 60sec

Stand tall, holding a light dumbbell in each hand with palms facing. Keeping your chest up and a bend in your elbows, raise the weights out to shoulder height, then lower back to the start.

5 Reverse flye
Dumbbell reverse flye
Sets 3 Reps 12-15 Tempo 2011 Rest 60sec