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Why do bodybuilders do fast reps?

Author

William Rodriguez

Published Jan 07, 2026

While faster reps are generally linked to more explosive movements that result in power, training with this tempo can also increase muscle size, according to the ​Journal of Human Kinetics​ study.

Are fast reps better for building muscle?

If you're looking to build muscle quickly, whether you've been training for years or are just starting out, then doing slower reps is the way to go. Workouts with slower reps cause your muscles to experience more time under tension, much more than with faster reps.

Why are fast reps better than slow reps?

The Benefits of Using Fast Reps for Muscle Growth

On the other hand, the main benefit of lifting reps at a faster tempo is that you can perform more reps or use a heavier weight than you can with a slower tempo.

Do explosive reps build muscle?

Explosive movements increase muscle fiber recruitment. Simply put, the more muscle fiber you activate, the more fibers you can exhaust while training, increasing muscle size.

Are slow reps better for hypertrophy?

"Resistance training with slow speed of movement is better for hypertrophy and muscle strength gains than fast speed of movement," International Journal of Applied Exercise Physiology, Vol.

30 related questions found

Is lifting weights fast or slow better?

For one, slower is safer. Most weightlifting injuries are the result of poor form and jerky, erratic movements. Also, the slower you go, the more time the muscles are carrying the weight load. Moving fast can cause momentum to take over and reduce the weight load.

Is it better to lift heavy or light weights to gain muscle?

So, in general, low reps with heavy weight tends to increase muscle mass, while high reps with light weight increases muscle endurance. This doesn't mean that you have to rely on one method exclusively. Alternating between the two may be the best approach for long-term success.

Do you need to lift heavy to get big arms?

“But to build bigger biceps and triceps you have to focus on perfect form, moving through a full range of motion and, crucially, never lifting too heavy. The key to adding arm size is to getting a good pump through lifting lighter for longer – and executing every rep as perfectly as possible.”

Is it better to do bicep curls fast or slow?

Especially with novices, faster reps can potentially lead to repetitions that are less in quality. Quality reps can lead to more effective learning of the movement, and targeting of the biceps with growth as a result. Slower repetitions are a better tool for learning and achieving more effective repetitions.

How do you move explosively?

7 VertiMax Exercises to Improve Explosiveness and Power

  1. Lateral High-Step. ...
  2. Repetitive Long Jumps. ...
  3. Paused Squat Jump. ...
  4. Three-Point Start. ...
  5. Palm-Loaded Standing Vertical. ...
  6. Single Response Max Vertical Jump. ...
  7. Two Leg Single-Response Long Jump.

How fast does muscle grow?

Muscle gain rates vary by individual, even when following the same program. Overall, with good nutrition and consistent training, research has found that 0.5–2 pounds (0.25–0.9 kg) of muscle growth per month is a good benchmark for maximal potential muscle growth ( 7 ).

How fast should I move up weights?

increase in most dumbbell sets). Many machines will have 2.5 weight increments, so just move up slowly and use your last few reps as a gauge to determine if you've found your new weight. As a rule, many fitness professionals will say not to increase your weight by more than 10% at a time.

Is it OK to train the same body parts each day since it will make you stronger?

Performing the same routine every day can lead to excess soreness or strain. Using the same muscle groups over and over again doesn't leave any time for your muscles to repair and grow. I recommend alternating days training different muscle groups so that you give your body time to recover.

Do negative reps build muscle?

In addition to building bigger, stronger muscles, negative reps also help make your connective tissue (ligaments and tendons) more resilient, fortifying them against strain and injury. This is especially important for field sport athletes who subject their bodies to explosive forces repeatedly each and every day.

Is lifting weights slowly better?

Slow down to use muscle, rather than momentum, pausing slightly at the bottom and top of each lift. Lower risk of injury. Rapid movements with heavy weights increase your risk of strains, sprains and muscle pulls. They also place your fellow gym goers at risk.

Is working out fasted better?

The potential benefits of fasted training include: Enhanced fat utilization: This effect, remember, only holds for low-intensity exercise. Better endurance: Multiple studies have shown that fasted cardio leads to an increase, over time, in VO2 max—a measure of endurance capacity.

Do biceps respond better to higher reps?

Howell is a fan of relatively light weight and high volume (reps in the 12 to 15 range) for biceps training, as the volume will tax both slow- and fast-twitch muscle fibers over time. Incorporating a large variety of biceps exercises performed with high sets and high reps will also help you build bigger arm muscles.

Are fast reps good?

If you're trying to build muscle, then normal to slow speeds are what you'll typically want to focus on. That's not to say there's no place for fast reps, but there are several conditions that need to be present to induce hypertrophy that are more likely to come to bear when you're doing slow or normal speed reps.

Should squats be done fast or slow?

Slow and fast squats are both beneficial, but your squat speed will depend on your experience level and your goals. Fast squats are better for athletes in power sports who need to improve their explosiveness while slow squats are better for perfecting squat technique, increasing hypertrophy, and building strength.

How do I get round biceps?

Wall curl. Stand with your back pressed against a wall, holding two 20-pound dumbbells with an underhand grip. Curl them upward toward your chest as you keep pressing your back and upper arms into the wall. Squeeze your biceps at the top of the curl; then lower the dumbbells.

How long biceps get bigger?

Typically, it takes around 6-8 weeks for you to start noticing changes in the appearance of your arms. At around the 12 week mark, this is typically when you can expect to see more significant changes, especially if you didn't already have a large amount of muscle mass in the area!

Why arent my biceps growing?

There are two main training errors people make that keep their biceps from growing. These are overtraining the biceps (often unintentionally) and a lack of variation in training techniques. Adding additional biceps focused workouts and trying multiple biceps exercises doesn't work.

How can I get huge arms?

8 Best Exercises for Bigger, Stronger Arms

  1. Bicep exercises.
  2. Concentration curl.
  3. Cable curl.
  4. Barbell curl.
  5. Chinup.
  6. Tricep exercises.
  7. Triangle pushup.
  8. Tricep kickback.

Do bodybuilders train heavy?

For long-term bodybuilding, you'll eventually incorporate heavier training using lower repetitions and near-maximum weights. The purpose of heavier training in bodybuilding is to improve strength that eventually allows more high repetition training using heavier weights.

How many reps is considered high reps?

For general fitness and strength training, something is considered to be high reps when 15 or more reps are performed. Performing 8-15 reps is considered to be moderate reps, whereas anything below 8 is lower rep training.