Logan Steele
Muscle hypertrophy refers to an increase in muscle mass, size and strength. This is achieved through strength training, such as weightlifting, which strains the muscles to cause damage. To achieve hypertrophy, it is important to continuously challenge your muscles and incorporate a range of training variables, such as frequency, intensity and volume. For example, lifting heavier weights for fewer repetitions can increase hypertrophy, as can performing compound exercises that train several muscle groups at the same time. In addition, blood flow restriction training (BFR) can be used to induce hypertrophy, particularly for those who are recovering from injury or older adults.
Characteristics and Values of Muscle Hypertrophy
| Characteristics | Values |
|---|---|
| Definition | An increase in muscle mass, size and strength |
| Causes | Strength training, weight lifting, and other short-duration, high-intensity anaerobic exercises |
| Types | Myofibrillar hypertrophy and sarcoplasmic hypertrophy |
| Training Variables | Frequency, intensity, and total volume |
| Training Techniques | Blood flow restriction training (BFR), progressive overload, and compound exercises |
| Training Schedules | Lifting heavy weights 2-3 days a week with rest days in between for muscle recovery |
| Training Volume | 10-20 sets per muscle group per week, with higher volumes leading to greater hypertrophy |
| Training Intensity | Low-load (30-60% 1RM) and high-load (>60% 1RM) training both lead to hypertrophy |
| Training Speed | Fast-to-moderate speeds for concentric movements (1-3 seconds) and slower speeds for eccentric movements (2-4 seconds) |
| Rest Intervals | 60-90 seconds of rest between sets |
| Supplements | Testosterone and anabolic steroids increase hypertrophy but may have side effects |
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What You'll Learn
Weightlifting and strength training
To build muscle through weightlifting, it is important to continuously challenge your muscles to promote growth and increased definition. This can be achieved by gradually increasing the weight lifted over time, rather than increasing it too quickly, which can lead to injury. The number of repetitions (reps) and sets performed will depend on the weight being lifted. For hypertrophy, it is generally recommended to use moderate weights and perform higher reps (6-12 reps) with more sets and limited rest in between. This can lead to mechanical fatigue, where the muscle fibres exhaust the available supply of ATP, a component that helps muscles contract. Research suggests that performing 10-20 sets per muscle group per week can maximise muscle hypertrophy.
Additionally, the type of hypertrophy training can be varied to target different types of muscle growth. Myofibrillar hypertrophy focuses on increasing strength and speed, while sarcoplasmic hypertrophy increases the body's sustained energy for endurance athletic events. A combination of these training types can be used to achieve specific fitness goals.
It is important to note that the results of hypertrophy training can vary depending on genetics, age, and other factors. A good hypertrophy program should include proven exercises that allow for progressive increases in strength over time. Adequate sleep and a diet rich in protein are also important components of a hypertrophy training regimen.
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Myofibrillar and sarcoplasmic hypertrophy
Myofibrillar hypertrophy involves an increase in the size and number of myofibrils, resulting in greater strength and power. 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. It is also characterised by an increase in muscle fibre density, which gives the muscles a hard and defined appearance. Examples of exercises that promote myofibrillar hypertrophy include 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.
Sarcoplasmic hypertrophy, on the other hand, 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, creatine phosphate, and enzymes. This type of hypertrophy is typically associated with higher repetition ranges and shorter rest periods. Sarcoplasmic hypertrophy increases the muscle's work capacity, allowing more sets and reps to be performed as the myofibrils have more supplies to do their work. Examples of exercises that promote sarcoplasmic hypertrophy include bicep curls, tricep extensions, lateral raises, and leg extensions. These exercises typically involve isolation movements and promote an increase in sarcoplasmic volume within the muscle fibres.
Both myofibrillar and sarcoplasmic hypertrophy contribute to an increase in muscle size, but they differ in the specific changes that occur within the muscle fibres. Myofibrillar hypertrophy primarily increases strength and power, while sarcoplasmic hypertrophy enhances endurance and gives muscles a full and rounded appearance.
To achieve optimal muscle growth, it is recommended to focus on both types of hypertrophy in your training program. This involves incorporating a mix of high-rep, moderate-rep, and low-rep workouts, as well as ensuring proper nutrition with sufficient protein and a caloric surplus. Additionally, it is important to continuously challenge your muscles and gradually increase the weight and intensity of your exercises to promote growth and increased definition.
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High-intensity exercises
To maximise muscle hypertrophy, it is important to incorporate both mechanical tension and metabolic stress. Mechanical tension can be achieved through exercises that create significant muscle tension, such as lifting heavy weights. Additionally, metabolic stress can be induced by performing a high number of repetitions (reps) with short rest intervals. This can be done through training techniques like drop sets, where you perform a set to fatigue and then reduce the load to continue exercising.
The combination of heavy load resistance training and high-intensity exercises is ideal for those seeking to gain muscle strength and mass. High-intensity training programs, typically involving at least 70% 1RM (one-repetition maximum), have been shown to effectively increase muscle hypertrophy. It is important to note that as intensity increases, the number of reps should be adjusted accordingly, with a recommended range of 6 to 12 reps for hypertrophy training.
To further optimise muscle growth, consider implementing progressive overload. This strategy involves progressively increasing resistance or repetitions over successive workouts while maintaining a high level of effort. Additionally, varying your exercises or activities can help target different muscle fibres and promote uniform growth. For example, compound exercises that involve multiple muscle groups and joints in a single action, such as squats or deadlifts, can be beneficial for hypertrophy.
It is worth noting that training status (beginner, intermediate, or advanced) will influence the specific training methods employed. For instance, a beginner in resistance training may benefit from 2-3 full-body resistance training sessions per week. Additionally, proper form and technique are crucial to prevent injuries, especially when performing high-intensity exercises. Consulting a certified trainer can be helpful in creating a personalised training program that aligns with your specific goals and fitness level.
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Blood flow restriction training
Blood flow restriction (BFR) training is a method of working out that involves the use of cuffs or bands to partially restrict blood flow to the muscles being worked out. This restriction is coupled with low-load resistance exercises. BFR training allows you to build muscle while exercising at a lower intensity, minimising stress on your body.
BFR training is particularly useful for individuals who cannot tolerate high mechanical loads, such as those recovering from injury or older adults. It is also an appealing alternative for older adults with sarcopenia or painful joints where joint compressive forces should be kept at a lower intensity.
BFR bands are available in various forms, including pneumatic bands and basic straps or bands that tighten around a limb. The bands fit looser than those used by medical professionals, and users must manually restrict their blood flow. If using BFR bands, it is important to monitor your blood pressure and the percentage of blood flow restriction.
BFR training can be incorporated into your workout routine during active recovery weeks, where you work out with less weight and for shorter durations. It is recommended that you go hard for three or four weeks, and then use BFR training to reduce the intensity for a week.
BFR training has been shown to induce hypertrophy comparable to traditional high-load training. This is likely due to increased metabolic stress and muscle fibre recruitment. Muscular hypertrophy refers to an increase in muscle mass, size and strength, achieved through exercise.
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Supplements and diet
Diet and supplements play a crucial role in muscle hypertrophy, alongside resistance training. A well-rounded, healthful diet, rich in macronutrients, is essential for optimising muscle gain and strength.
Protein is integral to building muscle, as it provides the "building blocks" to build and repair muscle tissue, aiding post-workout recovery. The recommended daily intake varies, with some sources suggesting 0.8-1 gram of protein per pound of body weight, while others recommend 0.6-0.9 grams per pound. However, it is agreed that consuming enough protein is essential for muscle gain. This can be achieved through a diet rich in lean protein sources, such as plant-based protein powder, lean meat, chicken, and fish. It is also beneficial to consume a source of protein within 30 minutes of a workout.
While it is possible to meet all the necessary criteria for muscle hypertrophy without supplements, certain supplements may help individuals meet their fitness goals. Creatine is one such supplement that can boost muscle and strength gain, as well as improve endurance and reduce muscle damage and soreness. Beta-hydroxy beta-methylbutyrate (HMB) is another supplement that may be beneficial, particularly for those new to exercise or increasing workout intensity, as it can aid in reducing the breakdown of muscle proteins. Additionally, a pre-workout drink like Pulse can enhance energy, mood, focus, and endurance while reducing fatigue.
It is worth noting that the effectiveness of supplements can depend on individual factors such as sex, genetics, and existing muscle mass. For example, males typically find it easier to achieve hypertrophy due to higher testosterone levels. Therefore, it is always advisable to consult a qualified healthcare professional, such as a doctor or dietitian, for tailored recommendations and support regarding supplements.
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Frequently asked questions
Muscle hypertrophy is an increase in muscle mass, size and strength. This is achieved through strength training, such as weightlifting.
Hypertrophy training focuses on building as much muscle as possible. The best hypertrophy programs include enough hard training to get your muscles to grow, but not so much that you can’t recover from your workouts. A good strength training plan will allow you to lift heavy and get stronger over time.
The frequency of your training will depend on your goals and current fitness level. You could try lifting heavy weights three days a week, or two days a week, with a day in between to recover. Research shows weightlifters should aim for 6-12 reps per set, with 60-90 seconds of rest between sets.
