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Jacob Mosen - Mammoth Project

Jacob Mosen

Bodybuilding, Strength & Conditioning
Coach
Jacob Mosen

Transform your physique with a powerful blend of bodybuilding and strength training. This is a 5-day per week programme designed to build muscle, increase strength, and achieve a balanced, lean physique. You'll also complete a little bit of cardio each week to keep your heart healthy. The program is structured in 4-week blocks, each focusing on 2-3 key muscle groups to maximise hypertrophy and strength, with the remaining muscle groups maintained at a lower volume. Sessions are designed to be efficient, with each workout intended to last between 45 minutes and 1 hour 40 minutes, making it easy to fit into your weekly routine.

This program is designed for lifters who have some gym experience and want to take their training to the next level. While it’s tailored for beginner to intermediate lifters, keep in mind that it assumes a basic understanding of standard exercises and gym equipment. It’s important that you’re comfortable with basic gym equipment and movements like squatting, deadlifting, and pressing before starting this program. However, for those who are familiar with the basics and looking to improve their technique, increase their strength, and build muscle, this program will provide a structured path to progress.

To fully benefit from the program, you'll need access to a gym that’s equipped with standard bodybuilding and strength training equipment, such as barbells, dumbbells, cable machines, adjustable benches, smith machines, and leg curl and leg extension machines. While the program doesn’t demand any highly specialised equipment, it does call for some ingenuity at times. For example, when setting up for certain exercises, you might need to adjust benches, use cables creatively, or position yourself in ways that target muscles more effectively. This will require a little problem-solving and an understanding of the gym layout, but nothing too complicated.

To ensure clarity and support throughout the program, every exercise includes a demonstration video that visually showcases correct technique. I also provide comprehensive written instructions to give you a deeper understanding of the movement. While I aim to keep these instructions concise, some exercises may require a bit of reading to fully grasp the technique and execution. The goal is to ensure you're set up for success and able to perform each exercise with confidence.

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Focused Muscle Development
Build Mammoth muscle through intelligent focus. Each training block prioritises 2–3 muscle groups, trained up to three times per week to deliver the volume required for growth. The result is steady hypertrophy gains and visible progress block after block without ever moving too far away from a foundation of strength.
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Strength as the Foundation
Mammoth Project never abandons strength. Heavy compounds remain a priority, and at key points of the year, training phases culminate in planned 1RM peaks. This ensures your growing physique will maintain neural efficiency and force production—so you stay strong, capable, and resilient year-round.
Features
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Access to your coach
Use the messaging system to receive individual feedback directly from your coach.
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Programming 5 days per week
5 main lifting days plus an additional cardio day because a healthy heart is also important.
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Exercise Video Guidance
All exercises have custom videos filmed by your coach so you're never left wondering if you're training correctly.
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No two weeks will ever be the same (probably)
Training is structured and evolving, progressing through the year, keeping you engaged, seeing consistent results, and always moving forward.
Equipment
Required
Barbell & Bumper Plates // Dumbbells // Adjustable Bench // Pullup Bar // Cable Machines // Leg Curl & Leg Extension // Roman Chair/Hyperextension Bench // Squat Rack with Adjustable Safeties // Adduction & Abduction Machine
Recommended
Kettlebells // Smith Machine // Gymnastics Rings // EZ Curl Bar // Ab mat // Lifting Straps // Weight Belt
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Sample Week
I will write fresh programming weekly. You’ll get notifications when they’re ready
Monday
2025-12-29

A

JMAD General Warmup

For Completion

B

JMAD Barbell Back Squat

4 x 4 @ 83 %

C

JMAD Standing Barbell Overhead Press

4 x 6

D

JMAD Wall-Leaning EZ Curl Bar Bicep Curl

E

JMAD Butterfly Situp

F

JMAD Adductor Machine

G

JMAD Smith Machine Calf Raise

4 x 6

Tuesday
2025-12-30

A

JMAD General Warmup

For Completion

B

JMAD Barbell Romanian Deadlift

4 x 7

C

JMAD Barbell Bench Press

4, 4, 4, 15 @ 86, 86, 86, 76 %

D

JMAD Single-Arm Dumbbell Row

E

JMAD Bench-Supported Cable Overhead Triceps Extension

F

JMAD Seated Leg Curl

Wednesday
2025-12-31

A

JMAD General Warmup

For Completion

B

JMAD Lat. Pulldown

C

JMAD Smith Machine Calf Raise

D

JMAD Cable/Gymnastics Rings Pelican Curl

E

JMAD Half-Kneeling Cable Rotation

F

JMAD L-Sit

2 x 0:00

G

JMAD Leg Extension

Thursday
2026-01-01

A

JMAD General Warmup

For Completion

B

JMAD Conventional Barbell Deadlift

4, 4, 4, 10 @ 83, 83, 83, 73 %

C

JMAD Flat Dumbbell Bench Press

D

JMAD Seated Row

E

JMAD Lying Triceps Extension

F

JMAD Cardio Moderate Duration Moderate Intensity

1 x 30:00

Friday
2026-01-02

A

JMAD General Warmup

For Completion

B

JMAD Back Squat (Pins)

4, 4, 4, 12 @ 76, 76, 76, 66 %

C

JMAD Hanging Leg/Knee Raise

D

JMAD Seated Dumbbell Shoulder Press

E

JMAD Smith Machine Calf Raise

6, 6, 6, 20

F

JMAD Single-Arm Dumbbell Preacher Curl

G

JMAD Rear Delt Cable Flye

Saturday
2026-01-03

A

JMAD Cardio Moderate Duration Moderate Intensity

1 x 45:00

Coach
coach-avatar Jacob Mosen

With 10 years of experience across CrossFit, Olympic weightlifting, powerlifting, bodybuilding, and sports performance, I help lifters build serious muscle on a foundation of real strength. I play competitive volleyball and occasionally run half-marathons, but now I'm returning to my roots to become the most jacked and shredded volleyball player on the court - a volleyball bodybuilder.

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You're ready

All you have to do is start

Start My 7-Day Free Trial
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FAQs
Who is this for?
This programme is for intermediate lifters who want to get bigger, stronger, and stay capable. Mammoth Project is for lifters ready for structured, challenging, results-driven training. If you’re a hybrid-minded athlete who wants size, strength, and long-term progress, this is for you.
Is it beginner friendly?
You should have some training experience and a solid foundation in basic lifts. Beginners may find the programming challenging, as it's suited for those ready to push past novice routines and focus on serious size and strength gains, but there is no minimum level of strength required.
What if I'm missing some equipment?
No worries! Substitutions are fine, and you can always ask the group for suggestions if you’re unsure. While I generally design the program assuming access to a commercial gym, I don’t expect everyone to have everything available at all times.
What if I don't like it?
This program isn’t for everyone—and that’s okay. Try a free week and see for yourself! If it’s not the right fit, or you want to try something else later, cancel anytime—no hassle.
Can I change the training schedule to suit me?
The programme is intended to be followed as it's written, but you can change it. You probably won't want to do the Monday, Wednesday, or Friday sessions on consecutive days as the blocks specific target muscles are trained on those days, but otherwise you can move the days around.
What's the body part split?
There isn't one - most days are likely to be full-body. You may notice patterns of specific muscles trained on specific week days, or some days appearing to be upper or lower body dominant, but these aren't permanent settings and will likely change when the next block starts.
The Proof
verified-athlete-avatar James

Strong, Jacked, Tattooed Gamer

Verified Athlete

"A long time client of Jacob's, his programming has helped me push my training further than what I thought I was capable of."

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Jacob Mosen - Mammoth Project
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Jacob Mosen - Mammoth Project
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Jacob Mosen - Mammoth Project
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Jacob Mosen - Mammoth Project