Training to Failure: Effective or Excessive? Exploring the Pros and Cons

Published on 13 May 2024 at 19:26

Training to failure means pushing yourself in an exercise until you can't do another rep with good form. It's like giving it your all! This method can definitely help you grow stronger muscles and boost your strength. However, there are some things to keep in mind because it's not without its risks.

Why It Can Be Good

Muscle Fiber Recruitment: 💪 Training to failure maximally recruits muscle fibers, ensuring that a high percentage of muscle units are activated during the exercise.

Muscle Hypertrophy: 🏋️‍♂️ Pushing muscles to failure induces greater muscle damage and metabolic stress, stimulating muscle growth (hypertrophy) over time.

Strength Development: 🏋️‍♀️ Training to failure challenges muscles to adapt and become stronger, leading to improved strength gains.

Progressive Overload: 📈 Training to failure applies progressive overload, continuously increasing demands on muscles for ongoing adaptation and growth.

Mental Toughness and Focus: 🧠 Enduring through sets to failure builds mental toughness, discipline, and focus, beneficial beyond fitness.

Efficiency in Workouts: ⏱️ Training to failure can be time-efficient, achieving high intensity and stimulus within fewer sets.

Variety and Challenge: 🔄 Incorporating training to failure adds variety and challenge to workouts, preventing plateaus and keeping routines engaging.

Time Under Tension: ⏳ Training to failure increases time under tension (TUT), enhancing metabolic stress and mechanical tension on muscles for hypertrophy.

Things to Watch Out For

Increased Risk of Injury: ⚠️ Fatigue from training to failure can compromise your form and technique, increasing the risk of injury.

Excessive Muscle Fatigue: 💪 Training to failure can lead to significant muscle fatigue, which may impede recovery and performance in subsequent workouts.

Central Nervous System (CNS) Fatigue: 🧠 Intense training to failure can tax your central nervous system, leading to increased overall fatigue and potential impacts on mood, sleep, and overall recovery.

Plateauing or Diminished Progress: 📉 Constantly training to failure may not always be necessary or beneficial for progress. It can lead to diminishing returns over time, as your body adapts to this high-intensity stimulus.

Potential Mental Strain: 😓 Training to failure can be mentally challenging and draining. It requires a high level of focus and determination, which may not always be sustainable or conducive to long-term motivation.

Variability in Response: 🔄 Not everyone responds the same way to training to failure. Some individuals may thrive with this approach, while others may experience excessive fatigue or diminished results.

Recovery Requirements: 🛌 Training to failure places significant stress on your muscles. Ensure you prioritize adequate recovery through proper nutrition, hydration, and sleep to support muscle repair and growth.

Balanced Programming: 🔄 Incorporate training to failure strategically within a balanced workout program. It should complement other training intensities and techniques rather than being the sole focus of your workouts.

Listen to Your Body: 🚨 Pay attention to signals from your body. If you're consistently feeling excessively fatigued, sore, or experiencing persistent pain, it may be a sign to dial back the intensity or volume of your workouts.

Progressive Overload: 📈 Training to failure should be used judiciously as part of a progressive overload strategy. Focus on gradually increasing weights, reps, or intensity over time, rather than relying solely on training to failure for gains.

What Do The Studies Say?

According to the National Library of Medicine which compared failure vs non-failure on strength, the following was found.

The size (cross-sectional area - CSA), angle (pentation angle - PA), and fibre length (fascicle length - FL) of the vastus lateralis (VL) muscle were assessed. Strength was measured using the maximum weight participants could lift once (1-repetition maximum - 1-RM) for leg press and leg extension exercises. Electromyography (EMG) was used to evaluate muscle activation after the training period.


Both RT-F and RT-NF protocols resulted in increased muscle size (CSA), changes in muscle angle (PA), and lengthening of muscle fibres (FL).

  • Muscle CSA: RT-F increased by 13.5% and RT-NF by 18.1%.
  • PA: RT-F increased by 13.7% and RT-NF by 14.4%.
  • FL: RT-F increased by 11.8% and RT-NF by 8.6%.

Strength gains were comparable between RT-F and RT-NF:

  • Leg press 1-RM: RT-F increased by 22.3% and RT-NF by 26.7%.
  • Leg extension 1-RM: RT-F increased by 33.3% and RT-NF by 33.7%.

EMG analysis showed no significant difference between the protocols, indicating similar levels of muscle activation.


Both training to failure (RT-F) and stopping short of failure (RT-NF) are effective methods for increasing muscle size, altering muscle angle and fibre length, improving strength, and activating muscles in individuals who exercise regularly.

Keywords: Muscle fatigue, Muscle mass, Pentation angle, Fascicle length, Electromyography.

In summary, whether training to failure or stopping short, similar improvements in muscle size, strength, and activation can be expected with regular exercise over a 10-week period.

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