Hypertrophy training for muscle growth

What hypertrophy training means

What does hypertrophy training mean?

Hypertrophy is the scientific term for an increase in muscle size. Hypertrophy training is resistance exercise set up to maximize that response. Any resistance training can build some muscle, but a hypertrophy program deliberately manages the things that matter most: how much work you do, how hard each set is, and how you make it harder over time.

You'll often hear about two kinds of hypertrophy:

• Myofibrillar hypertrophy is growth of the contractile proteins inside muscle fibers, which directly increases your capacity to generate force.
• Sarcoplasmic hypertrophy is expansion of the fluid and energy stores around those proteins, which adds volume without a matching gain in strength.

The split is tidier in gym talk than in the lab. A 2020 review found select evidence for sarcoplasmic hypertrophy during resistance training, along with other patterns of growth, and researchers are still working out how much each contributes. You can't choose one or the other with a rep scheme, so there's no need to program around it.

The science behind muscle growth

What actually makes muscles grow?

A widely cited 2010 review named three factors that can play a role in muscle growth. They're still the standard framework, though the evidence has shifted since then.

Mechanical tension is the force your muscles produce when they contract against resistance. A 2019 review calls mechanical signals the prime candidates for what starts hypertrophy. This is why progressive overload, gradually increasing weight or reps, is the foundation of any program.

Muscle damage refers to small tears in muscle fibers, especially during the lowering phase of a lift. It was long credited with driving growth, but that view hasn't held up. The same 2019 review says damage is probably not essential, and a 2018 review concluded it doesn't mediate or boost hypertrophy, since programs that cause little damage build similar muscle. So that soreness a day or two after training tells you the workout was new or hard. It doesn't tell you it worked.

Metabolic stress is the buildup of byproducts like lactate during exercise, the burn you feel in high-rep sets. It may contribute through several cellular mechanisms. The old explanation, that it creates a hormone surge that builds muscle, is weaker. In a 12-week trial of 49 trained men, the rise in hormones after a workout had no relationship to gains in muscle or strength.

How to train for hypertrophy

How should you train for hypertrophy?

Building muscle isn't complicated, but it does take attention to a few training variables. Here's a quick view, followed by the research on each.

Common starting targets for hypertrophy training

Lifters also ask about drop sets, supersets and other advanced methods. A 2019 systematic review of 30 studies found that some may save time or add a useful stimulus, but evidence was too thin for specific guidelines on several of them. Get the basics right first.

Periodization for long-term muscle growth

Do you need periodization to build muscle?

Periodization is the planned organization of your training over time, so you keep progressing and avoid plateaus. Rather than doing the same workout indefinitely, you vary things like volume, intensity and exercise selection on purpose.

For hypertrophy, a simple approach is to cycle between a phase of higher volume at moderate intensity (accumulation) and a phase of moderate volume at higher intensity (intensification) every 4 to 8 weeks. That helps manage fatigue and keeps workouts from going stale.

You don't need a complicated scheme as a beginner or intermediate lifter. Focus first on consistent overload. Add structure later, when progress gets harder to come by.

Nutrition for muscle growth

What should you eat to build muscle?

Training provides the stimulus for growth, and food provides the raw materials. Without enough protein and total calories, even a great program won't deliver what it could.

Supplements for muscle growth

Which supplements are worth it?

A well-rounded diet should cover most of what you need, but a few supplements have solid evidence. Check with your doctor first if you have a health condition or take medication.

Creatine monohydrate is the most researched supplement for strength and muscle mass. It helps your muscles regenerate ATP, their immediate energy source, during hard efforts, so you can do more work. A dose of 3 to 5g daily is effective for most people. The International Society of Sports Nutrition calls it safe and well tolerated in healthy people, based on studies running as long as 5 years.

Protein powder (whey, casein or plant-based) is simply a convenient way to reach your protein target when whole food isn't practical. It's food in powder form, and it doesn't build muscle by itself. Shakez Protein Powder is ours, with 20g of whey protein per scoop.

Caffeine can improve training by raising alertness and making hard work feel a little easier. The society's caffeine position stand reports small to moderate benefits for muscular strength and endurance in many, but not all, studies.

Beyond these basics, most products marketed for muscle building have weak evidence or none. Get your training and food right before you spend money on them.

Recovery for muscle growth

How much does recovery affect muscle growth?

Here's something many people miss: you don't build muscle in the gym. You give the signal in the gym, and you build during recovery. Skimp on it, and you limit your results and raise your injury risk.

Sleep is non-negotiable. Growth hormone release peaks during deep sleep. In a small crossover study of 13 young adults, one night without sleep reduced muscle protein synthesis by 18%, raised cortisol by 21% and lowered testosterone by 24%. Aim for 7 to 9 hours a night. For more, see our guide on the importance of sleep for overall health.

Rest days let your muscles repair and adapt. Most people do well training 4 to 5 days a week with 2 to 3 rest days. Listen to your body. Persistent fatigue, declining performance or nagging aches are signs you may need more recovery. Pain that's sharp or doesn't let up is worth a visit to your doctor.

Stress management matters too. Chronic stress raises cortisol, which may interfere with growth and recovery. Find what works for you, whether that's meditation, a walk or simply protecting some downtime.

Practical tips for hypertrophy training

How do you make hypertrophy training stick?

All the science in the world won't help if you can't apply it consistently. These habits make it sustainable.

• Track your workouts. You can't overload progressively if you don't know what you lifted last time. Keep a simple log of exercises, weights, sets and reps.
• Focus on compound movements. Squats, deadlifts, bench presses, rows and overhead presses work several muscle groups at once and should form the base of your program. Add curls, lateral raises and leg extensions as extras.
• Put form ahead of ego. Sloppy technique shifts work away from the target muscle and raises injury risk. Use weights you can control through a full range of motion.
• Be patient. Muscle growth is slow. A common rule of thumb is 0.5 to 1 pound of muscle per month, and less as you get more advanced. That's a rough estimate rather than a study result, and it varies with experience, genetics and training.
• Make the food convenient. Meal prep helps when you have a high protein target to hit day after day.

That last one is where most programs slip. Lifting takes an hour, but hitting 33g of protein four times a day takes planning. If that's your weak link, our meal plans can cover a few of those meals with no cooking. Our High Protein Meal Plan starts at $63 for 6 meals, with 2 extra ounces of meat per meal and about 500 or more calories. Or use Build A Meal Plan to choose meals one by one with the High Protein filter. Across our current menu, meals run from 20g to 55g of protein, with a median of 31.5g. They're not a training program, and they won't build muscle without the work. They just make the food part easier.

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Ready to go further? Our complete guide to gaining healthy weight goes deeper on protein, calories and meal planning. Master the basics first. Consistency with the fundamentals will take you further than any complicated program or supplement.