Dominic Stone
Muscle power is the ability to exert force quickly and repeatedly, which is different from muscle strength, which is the ability to exert maximal force in a single contraction. Muscle power is a product of force and velocity, or strength and speed, and is often associated with explosive movements such as jumping or sprinting. Training for muscle power involves performing high-power movements that recruit more muscle fibres and improve reaction time. This type of training can improve athletic performance and is important for injury prevention.
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What You'll Learn
Muscle power vs. muscle strength
Muscle power and muscle strength are two distinct concepts, and understanding the difference between the two is crucial for athletes, dancers, and older adults looking to improve their physical performance and overall fitness.
Muscle strength refers to the maximum amount of force one can generate during a single contraction, such as lifting a heavy weight that could only be lifted once before requiring a break. It is the ability to exert maximal force in a single movement, and it is typically measured as 1RM (one repetition maximum) in the gym or through specialised machines. Specific strength training focuses on improving the fast-twitch capacity within a muscle, enabling the production of rapid and forceful contractions. This type of training is particularly important for injury prevention, as it helps stabilise and protect joints during sudden movements.
Muscle power, on the other hand, is about the production of force quickly and is calculated as the product of force and velocity, or strength and speed. It involves explosive, high-velocity muscle contractions, where maximal power can be achieved in under a second. Power-based activities include sprinting, jumping, and throwing. Training for muscle power involves performing fast repetitions and ballistics, such as box jumps or sumo deadlifts, that challenge the brain to recruit more muscle fibres and improve reaction time.
While muscle strength is important for everyday activities and can decline with age, muscle power is crucial for athletic performance and injury prevention. Power training helps improve reaction time and enables individuals to stabilise their bodies during sudden movements, reducing the risk of falling or tripping. Additionally, power training can improve metabolic rate and fat utilisation, enhancing overall fitness and performance.
Both muscle strength and muscle power are important components of a well-rounded fitness routine. While strength training focuses on slow and controlled movements, power training emphasises speed and velocity. By incorporating a variety of exercises and adapting movement patterns, individuals can improve their strength and power, leading to better performance, injury prevention, and overall fitness.
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Power-based activities
Muscle power is distinct from muscle strength, as it involves the production of a great force over a short period of time. This is achieved through explosive, high-velocity muscle contractions, which can be trained by lifting between 30 to 80 percent of your 1RM (maximum weight lifted in one repetition). Power-based activities include sprinting, jumping, and throwing, as well as ballistic movements like box jumps with dumbbells.
Examples of power-based exercises include:
- Sprinting, especially uphill sprinting, which requires strength and speed.
- Jumping, particularly box jumps or vertical jumps, can be made more challenging and power-focused by adding weights.
- Throwing or lifting weights, focusing on fast repetitions with a sub-maximal load.
- Dancing, which requires explosive movements, such as jumps, lifts, and catches.
- Sports-specific movements, such as flipping tires, leaping over hurdles, or climbing walls.
To improve muscle power, it is recommended to perform a variety of exercises to create a broader range of adaptations and ensure continuous improvement. These exercises can be done in short, intense sessions of 3-5 minutes, 2-3 times per week.
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Training for power
Muscle power is distinct from muscle strength, and refers to the ability to produce a great force over a short period of time. It is a product of force and velocity, or strength and speed, and is often characterised by explosive, high-velocity muscle contractions. Training for muscle power, therefore, involves exercises that improve strength and speed.
It is important to note that training for power is about outsmarting the brain. The brain wants to give you the minimum amount of muscle fibres needed to perform a task, always keeping some in reserve. By doing high-power movements, you force the brain to recruit more fibres, sending a signal to the muscles to move quicker and improving reaction time.
To build power, you should incorporate exercises that replicate the movement patterns of the activity you are training for, stressing the muscle groups that are most needed. For example, if you are returning to technique class after an ankle sprain, you will need to condition your ankle to jump. Incorporate foot exercises that match the jumping speed and range of motion that occur in dance jumps. While slow and sustained strengthening exercises are recommended, you will benefit from restrengthening the feet with an increase in tempo, coming as close as possible to actual jumping speed.
To realise gains in power, apply the principle of progressive overload. Overload should happen in a gradual and progressive manner, whereby the intensity, duration, and frequency of exercises are steadily increased. For general health, try to do at least 150 minutes of moderate-intensity aerobic activity a week, as well as muscle-strengthening activities on 2 days a week.
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Power and age
Muscle power is distinct from muscle strength, referring to the production of a great force over a short period. This is often referred to as "explosive" movement, such as jumping or throwing, which requires strength and speed. Power-based training focuses on high-power movements, which force the brain to recruit more muscle fibres, improving reaction time and metabolic rate.
Power and strength are both impacted by age. Typically, muscle mass and strength increase steadily from birth, peaking around 30-35, before slowly declining. This process of muscle loss, called sarcopenia, accelerates from 65 onwards for women and 70 for men. By 50, a person can expect to lose approximately 12-15% of muscle strength per decade. This can greatly impact an individual's quality of life, affecting their ability to perform daily tasks and increasing the risk of falls and fractures.
However, age-related muscle loss can be slowed by maintaining an active lifestyle, including strength training, and a healthy diet. Resistance-based strength training can improve strength and reverse muscle loss. Progressive resistance training (PRT) is recommended, where the workout volume is gradually increased as strength and endurance improve. This constant challenge builds muscle and prevents plateaus.
Older adults can also benefit from aerobic activity, which can help maintain muscle mass and improve mobility. For example, walking with a weighted vest or backpack can add an extra challenge. Variety is also important, with a range of exercises ensuring the body never fully adapts and is always improving.
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Improving muscle power
Muscle power is the ability of the body to perform an activity quickly and repeatedly by applying a given force. It is a product of force and velocity, i.e. strength and speed. Improving muscle power results in better athletic performance and is also important for health and quality of life.
To improve muscle power, it is important to understand the difference between muscle strength and muscle power. Muscle strength is the ability to exert maximal force in a single contraction, such as lifting a weight that you could lift only once. On the other hand, muscle power refers to the ability to generate a great force over a short period of time, such as fast leg kicks and explosive jumping.
There are several ways to improve muscle power, including:
- Plyometric exercises: These involve performing combined multisprings to activate the metabolism using cycles of stretching and shortening. An example is basketball practice.
- Isokinetic exercises: These are repetitive movements performed at a constant speed, with the weight being modified to maintain the same speed.
- Power training: This method focuses on both strength and speed, targeting the two key ingredients of muscle power.
- Specificity training: This involves replicating movement patterns, such as in dance, and stressing the muscle groups that are most needed in specific activities.
- Resistance training: This can help reduce age-related muscle decline and improve overall muscle power.
- Power clean: This exercise involves lifting a barbell as fast as possible and placing it on the back of your shoulders while in a front squat position.
- Medicine ball toss: This exercise provides a lot of muscular power to the torso by dragging the force from the ground and rotating the hips.
It is important to note that the sequence and periodicity of muscle power training should be planned, and it is always advisable to consult with a health and sports professional to avoid injuries. Additionally, variety in training creates a broader range of adaptation, ensuring that your brain and muscles never fully adapt and are always improving.
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Frequently asked questions
Muscle power is the ability of a body to perform an activity quickly and repeatedly by applying a given force. It is a product of force and velocity, i.e., strength and speed.
Muscle strength is the ability to exert maximal force in a single contraction, such as lifting a weight that you could lift only once before needing a break. Muscle power, on the other hand, is about the speed of muscle contraction and the rate of force development.
Training for muscle power involves performing explosive, high-velocity muscle contractions with a sub-maximal load. Examples include sprinting, jumping, and throwing. It is recommended to do these exercises two to three times a week for three to five minutes each session.
Muscle power helps in improving athletic performance and can also aid in injury prevention. As we age, having muscle power becomes important for maintaining a good quality of life as it becomes more challenging to perform basic tasks like getting up from a seat.
