Slow reps vs. fast reps: How speed affects muscle growth and power

July 9, 2024

July 9, 2024

July 9, 2024

When you hit the gym, how fast do you lift? The speed of your repetitions—whether you perform them quickly or slowly—plays a crucial role in your fitness outcomes. This article delves into the benefits of fast reps versus slower reps, helping you understand how to tailor your workouts to achieve specific goals.



What Are Fast Reps?


Fast reps involve performing exercises at a high speed, usually in an explosive manner. This method targets fast-twitch muscle fibers, which are responsible for quick, powerful movements.


  • Explosive Power: Fast reps enhance your ability to perform rapid, forceful movements, making them ideal for sports that require bursts of speed and power.

  • Neurological Efficiency: Training with fast reps improves your nervous system's ability to recruit muscle fibers quickly and efficiently.

  • Metabolic Boost: Fast reps can increase your metabolic rate, aiding in fat loss and overall conditioning.


Example Exercise for Fast Reps: Perform a set of explosive push-ups, focusing on pushing yourself off the ground as quickly and forcefully as possible.




What Are Slow Reps?


Slower reps involve performing exercises in a controlled manner, extending the time your muscles are under tension. This method primarily targets slow-twitch muscle fibers, which are responsible for endurance and sustained muscle contraction.


  • Increased Muscle Tension: Slow reps maximize the time your muscles are under tension, promoting muscle growth and hypertrophy.

  • Muscle Endurance: Training with slower reps improves your muscle endurance, making your muscles more resistant to fatigue.

  • Better Form and Control: Slow reps allow for greater focus on form and technique, reducing the risk of injury and ensuring that the target muscles are properly engaged.


Example Exercise for Slower Reps: Perform a set of bicep curls, lifting the weight slowly and lowering it even more slowly, taking about 3-4 seconds per phase.




The Role of Repetition Speed in Training


According to a study published by the National Institutes of Health (NIH), the speed at which you perform repetitions can significantly influence muscle activation and growth. The study found that slower reps increase muscle protein synthesis, a key factor in muscle growth, while fast reps enhance power and strength gains by improving neuromuscular efficiency​​.




Combining Fast and Slow Reps for Maximum Benefit


Training with both fast and slow reps can provide a comprehensive approach to muscle development and strength gains. This method, known as tempo training, involves varying the speed of your reps to leverage the benefits of both techniques.


Example of a Combined Workout:


Phase 1: Fast Reps Focus

  • Duration: 4 weeks

  • Goal: Enhance explosive power

  • Training Method: Perform compound exercises like squats and bench presses with fast reps (1-3 seconds per rep)

  • Rest Periods: Shorter rest periods (30-60 seconds) to maintain intensity and metabolic rate


Phase 2: Slow Reps Focus

  • Duration: 4 weeks

  • Goal: Promote muscle growth and endurance

  • Training Method: Perform isolation exercises like leg extensions and bicep curls with slow reps (4-6 seconds per rep)

  • Rest Periods: Longer rest periods (60-90 seconds) to allow for muscle recovery and growth


Transition Phase: Mixed Reps

  • Duration: 1 week

  • Goal: Prepare for the next training cycle

  • Training Method: Combine fast and slow reps within the same workout to maintain adaptation and prevent plateaus

  • Rest Periods: Moderate rest periods (45-75 seconds) to balance intensity and recovery



Conclusion


Understanding the benefits of fast and slow reps allows you to tailor your workouts to your specific fitness goals. Whether you aim to boost explosive power, enhance muscle endurance, or achieve a balanced approach to both, incorporating a variety of repetition speeds can help you optimize your training results. Remember, the key to effective training lies in the strategic combination of different methods to continually challenge your body and promote overall fitness improvements.


By implementing these insights into your workout routine, you can maximize your muscle growth and strength gains, ensuring a well-rounded and effective routine. At Setgraph, we have created our application with the goal to empower you to reach your fullest potential. Our app allows you to easily set up custom lists to track each of your tempos separately, log each exercise, and monitor your improvements over time. Download Setgraph today to reach your goals with ease.

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