Victor Forge
Muscle hypertrophy is the process of increasing the size of skeletal muscles through the growth of their component cells. This is achieved through strength training, which causes neural and muscular adaptations that increase the capacity of an athlete to exert force through voluntary muscular contraction. The two types of muscle hypertrophy are myofibrillar hypertrophy, which increases the number of myofibrils, leading to enhanced muscle strength and density; and sarcoplasmic hypertrophy, which increases muscle glycogen storage, resulting in larger-looking muscles without a corresponding increase in strength. To achieve muscle hypertrophy, it is essential to progressively challenge the muscles through various exercises, adequate rest, proper diet, and sometimes supplements.
| Characteristics | Values |
|---|---|
| Definition | Muscular hypertrophy refers to growing muscle cells and increasing muscle mass. |
| Muscle Types | There are two types of muscle hypertrophy: myofibrillar and sarcoplasmic. |
| Myofibrillar Hypertrophy | An increase in the number of myofibrils, leading to increased muscle strength and density. |
| Sarcoplasmic Hypertrophy | An increase in muscle glycogen storage and sarcoplasmic fluid, leading to larger-looking muscles without increased strength. |
| Training Techniques | Strength training, resistance training, and progressive overload are common techniques to induce hypertrophy. |
| Exercise Types | Compound exercises that train multiple muscle groups simultaneously, such as squats, deadlifts, and bench presses, are effective for hypertrophy. |
| Exercise Frequency | There is no exact frequency, but recommendations range from two to five days a week, depending on fitness level and goals. |
| Exercise Schedule | Alternating between upper and lower body workouts allows for muscle recovery and growth. |
| Repetitions | Aim for 6–12 reps per set, with 60–90 seconds of rest between sets. |
| Weight | Gradually increase weight over time to challenge the muscles and induce growth. |
| Supplements | Protein and creatine supplements can aid in muscle growth and recovery. |
| Recovery | Recovery days are essential to allow muscles to repair and grow. |
| Sleep | Getting good quality sleep is important for muscle growth. |
| Genetics | Genetics play a role in muscle hypertrophy, with testosterone influencing hypertrophy rates, particularly during puberty in males. |
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What You'll Learn
Weightlifting schedules
Muscle hypertrophy is the enlargement of muscle mass typically caused by resistance training. It is important to continuously challenge your muscles to see growth and increased definition. Therefore, it is recommended to increase the amount of weight lifted gradually each week.
A good weightlifting schedule for hypertrophy includes time-proven exercises that allow you to lift heavy and get progressively stronger over time. The best programs include enough hard training each week to stimulate muscle growth, but not so much that you can't effectively recover from your workouts. Rest and recovery are essential for muscle growth, so it is recommended to allow for 60-90 seconds of rest between sets.
To maximise muscle hypertrophy, focus on compound weightlifting exercises that involve multiple muscle groups and joints in one action. Isolation exercises that involve only one joint and major muscle group can still be included in your program, but they are less effective for hypertrophy. For hypertrophy, it is recommended to aim for 6-12 reps per set at 75-85% of your single-rep weight capacity, but this will depend on your fitness goals and experience.
- Day 1: Barbell Bench Press (3 sets of 4-6 reps with 2-3 min rest), Incline Barbell Bench Press (3 sets of 4-6 reps with 2-3 min rest)
- Day 2: Dumbbell Bench Press (3 sets of 8-10 reps with 2-3 min rest)
- Day 3: Squat (3 sets of 4-6 reps with 2-3 min rest), Leg Press (3 sets of 8-10 reps with 2-3 min rest)
- Day 4: Deadlift (3 sets of 4-6 reps with 2-3 min rest), Romanian Deadlift (3 sets of 8-10 reps with 2-3 min rest)
- Day 5: Accessory exercises such as bicep curls, tricep dips, and lateral raises (3 sets of 8-12 reps with 1-2 min rest)
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Muscle recovery and rest
It is important to note that muscles can adapt quickly to exercise, so it is necessary to continuously challenge them to achieve growth and increased definition. This can be done by gradually increasing the weight you are lifting each week, rather than increasing it too quickly. Additionally, varying your exercises and targeting different muscle groups can help stimulate growth. For example, you can alternate between upper-body and lower-body lifting on different days, allowing you to work different muscles while giving others a chance to rest and recover.
The time required for recovery between training sessions is important to optimize muscle growth. This time can be used for light activity, relaxation, rest, and good-quality sleep. Research suggests that weightlifters should allow for 60-90 seconds of rest between sets, performing 6-12 reps per set. This allows for muscle fatigue, which is important for achieving hypertrophy.
It is also worth noting that there are advanced resistance training techniques that can be implemented to maximize muscle hypertrophy. These include agonist-antagonist, upper-lower body supersets, drop and cluster sets, and fast, controlled eccentric contractions. However, there is a lack of consensus on the efficiency of these advanced techniques compared to traditional approaches.
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Types of hypertrophy: myofibrillar and sarcoplasmic
Muscular hypertrophy refers to growing your muscle cells and increasing muscle mass. There are two types of muscle hypertrophy: myofibrillar and sarcoplasmic.
Myofibrillar hypertrophy refers to an increase in the size and number of myofibrils within the muscle fibres. Myofibrils are responsible for generating force during muscle contractions, so an increase in their size and number leads to greater strength and power. This type of hypertrophy is often associated with heavy resistance training and low repetitions. Exercises that promote myofibrillar hypertrophy include compound movements such as squats, deadlifts, bench presses, and overhead presses. These exercises require a high level of force production and recruit a large number of muscle fibres, leading to myofibrillar hypertrophy. Myofibrillar training will help with strength and speed.
On the other hand, sarcoplasmic hypertrophy involves an increase in the volume of sarcoplasm within the muscle fibres. Sarcoplasm is the fluid that surrounds the myofibrils and contains various substances such as glycogen, ATP, and enzymes. This fluid provides energy to the muscles during a workout. Sarcoplasmic hypertrophy is typically associated with higher repetition ranges and shorter rest periods. Exercises that promote sarcoplasmic hypertrophy include isolation movements such as bicep curls, tricep extensions, lateral raises, and leg extensions. Sarcoplasmic growth helps give your body more sustained energy for endurance athletic events.
It is important to note that myofibrillar and sarcoplasmic hypertrophy are not mutually exclusive. Combining both types of hypertrophy training can lead to optimal results in terms of muscle growth and strength gains. By incorporating both heavy resistance training and higher repetition ranges into your training program, you can target both types of hypertrophy and achieve a balanced and well-rounded physique.
To maximise hypertrophy, it is crucial to continuously challenge your muscles and increase the resistance over time. Additionally, diet is an important consideration, with protein being a key component for muscle growth.
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Progressive overload
There are different types of progressive overload strategies that can be employed. Linear progression involves increasing the load in a linear fashion throughout the training program. Step loading, on the other hand, uses larger load increments but less frequently, meaning you stick to a certain load for a longer period. Additionally, the "2-for-2 rule" is a guideline that suggests increasing the weight when you can perform two additional reps beyond your rep goal for the last set, consistently for two weeks.
The number of repetitions per set is an important consideration. For those focused on muscle growth, increasing the volume of reps per set (up to 25) is a good strategy. However, for those prioritizing strength, it is recommended to keep the volume lower (below 8 reps per set) and focus more on increasing the weight. It is also worth noting that decreasing the rest time between sets can be an effective overload strategy for hypertrophy, while strength athletes may benefit from maintaining sufficient recovery time.
To implement progressive overload safely and effectively, it is crucial to monitor your personal force-velocity profile and adapt the training variables accordingly. This can be done by tracking your performance over time and making adjustments when necessary. For example, if you notice an increase in bar velocity at a given load, it may be an indication to increase the load or volume. Additionally, it is important to prioritize good form and safety, especially when employing more advanced techniques such as partial reps or negatives, which require a spotter.
In summary, progressive overload is a key concept in muscle hypertrophy training. By gradually increasing the stress on the muscles and employing various strategies, individuals can stimulate muscle growth and avoid plateaus. It is important to tailor the progressive overload approach to your specific goals and fitness level, ensuring a safe and effective training program.
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Supplements to aid muscle growth
Supplements can be a great way to support muscle growth, but it is important to remember that they should be paired with resistance training and a well-rounded, healthy diet. Here are some supplements that can aid muscle growth:
Creatine
Creatine is a molecule produced naturally in the body, providing energy for muscles and other tissues. Taking it as a supplement can increase muscle creatine content, which promotes muscle gain and improves muscle strength. It can also increase the water content in your muscle cells, causing them to swell slightly and trigger muscle growth. Creatine is typically consumed through red meat, fish, or supplements. The usual dosage is 20 grams per day for a week, followed by 3-5 grams per day for up to 12 weeks. Side effects may include weight gain due to water retention, nausea, muscle cramps, and heat intolerance.
Whey Protein
Whey protein is a fast-digesting protein found in milk that contains essential amino acids necessary for muscle growth, particularly leucine. Consuming whey protein consistently alongside exercise may lead to improved strength and muscle growth. Dairy products, especially milk, are the best sources of whey protein.
Branched-Chain Amino Acids (BCAAs)
BCAAs are made up of three amino acids: leucine, isoleucine, and valine. They are critical for muscle growth and are found in most protein sources, especially animal-based ones like meat, poultry, eggs, dairy, and fish. While BCAAs are commonly consumed through food, they are also popular as supplements. Some studies suggest that BCAAs may improve muscle gain or reduce muscle loss, but more research is needed to confirm this.
Carnitine
Carnitine is a compound produced naturally in the brain, liver, and kidneys, and it plays a role in energy metabolism. It can increase oxygen intake and power output during exercise, supporting post-workout recovery by aiding the healing of damaged cells that cause muscle soreness. Carnitine can be consumed through red meats, fish, and certain plants, or taken as a supplement. Typical doses range from 1-4 grams daily for up to a year. Side effects may include stomach cramps, nausea, and diarrhea.
Glutamine
Glutamine supplements often come in powder form and have been studied at doses of up to 45 grams daily for six weeks. Side effects may include bloating, constipation, headaches, and musculoskeletal pain.
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Frequently asked questions
Muscle hypertrophy is an increase in muscle mass, size and strength. This is achieved through exercise and strength training.
Weightlifting is the most common way to increase hypertrophy. You can perform many repetitions (reps) at a lower weight or lift a heavy weight for fewer reps. The way you lift will determine the way your muscles grow and change. For example, you can develop muscle tone with a lighter weight, but it will require a high number of repetitions to improve efficiency. Compound exercises such as squats, deadlifts and bench presses are also effective as they train several major muscle groups at the same time.
This depends on your goals and fitness level. Some trainers say three days a week, others say five. It is important to let your muscles recover, so lifting every other day is a good way to allow time for rest and recovery.
A healthy diet rich in macronutrients is important for building muscle. Protein is an essential part of this, providing the body with the building blocks to build and repair muscle tissue. Research suggests that getting more than 1.62 grams of protein per kilogram of body weight per day is unlikely to produce additional benefits. Supplements such as creatine can also boost muscle and strength gain.
It is important to continuously challenge your muscles to continue seeing growth and increased definition. Gradually increase the weight you are lifting over time to avoid injury. Getting good quality sleep is also important.
