Key Moments

Q&A: Fasted Training, Training Frequency, and How Much Research is Enough? (Episode 19)

Stronger By ScienceStronger By Science
Education4 min read118 min video
Sep 26, 2019|10,150 views|212|17
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TL;DR

Fasted training, peak performance, diet recovery, and training frequency are discussed, alongside evidence thresholds for new strategies.

Key Insights

1

Fasted cardio is generally fine for low-intensity work, but higher intensity should be avoided or supplemented by prior carbohydrate intake.

2

Achieving peak performance in powerlifting meets typically yields a 2-4% increase; attempting to peak for two meets four weeks apart is challenging and compromises optimal performance in one.

3

Recovery from long diets is multifactorial, depending on diet duration, extremity, rate of weight loss, and achieved leanness, often taking 3-6 months for hormonal and performance normalization.

4

Training frequency response is highly individual; 1-2x/week for deadlifts and 2-3x/week for squats/bench presses are good starting points, but individual adaptation varies significantly.

5

Intuitive eating can be unreliable for calorie intake regulation due to hedonic and cultural factors; a period of tracking is recommended to build skills for habitual eating.

6

Evidence threshold for adopting new strategies involves considering study quality, sample size, effect size, and potential risks versus benefits, with lower risk strategies requiring less evidence.

FASTED TRAINING AND CARDIO CONSIDERATIONS

The discussion on fasted training clarifies that while there's no conclusive performance benefit and some evidence it may be detrimental, low-intensity cardio in a fasted state is acceptable. This is partly due to the concept of "training low" (low glycogen availability), which may benefit aerobic adaptations if the intensity is low and the overall program includes high-intensity work. However, high-intensity exercise in a fasted state is likely to compromise performance and adaptations. The distinction between fasted training and low-glycogen training is also noted, as one can induce the other through various means, not just by skipping breakfast.

PEAKING FOR POWERLIFTING MEETS

The podcast addresses the challenge of peaking for two powerlifting meets four weeks apart, emphasizing that perfect peaking for both is unlikely. A typical peak provides a 2-4% performance increase, with some individuals achieving more but historical data being a better predictor. The recommended strategy prioritizes one meet for a full peak, followed by a recovery period, and then entering the second meet in a non-fatigued but not perfectly peaked state. Practicing peaking strategies during training is crucial for individuals to understand their own responses.

METABOLIC RECOVERY FROM PROLONGED DIETS

Recovery from long-duration diets is highly variable and depends on the diet's extremity, rate of weight loss, and achieved leanness. Aspects like metabolic rate, hormones (testosterone, leptin), and performance can take 3-6 months to normalize completely, with some hormonal aspects like menstrual cycles potentially taking much longer. The recovery rate is significantly influenced by intentional overfeeding and weight regain. The goal is not necessarily to return leptin levels to their initial baseline but to bring them within a normal reference range, potentially improving leptin sensitivity.

TRAINING FREQUENCY AND PERIODIZATION

The podcast distinguishes between Daily Undulating Periodization (DUP) and training frequency. DUP can be beneficial, particularly in the short term, by varying intensity and volume weekly, which can enhance engagement and potentially strength gains over shorter periods (e.g., 6-12 weeks). However, in longer-term studies, DUP doesn't consistently outperform linear periodization. Regarding frequency, 1-2x/week for deadlifts and 2-3x/week for squats and bench presses are presented as solid starting points. Individual responses to frequency are highly variable; some thrive on higher frequencies (4-5x/week), while others perform best with lower frequencies (1x/week).

INTUITIVE EATING AND APPETITE REGULATION

The discussion on intuitive eating highlights that while it can be a sustainable long-term approach, relying solely on hunger cues might be unreliable in the modern food environment. Human appetite regulation is influenced by hedonic, cultural, and societal factors, often overriding natural hunger signals. For muscle growth, relying on exercise to up-regulate hunger significantly is cautioned against, as high-intensity exercise can acutely suppress appetite. A period of structured tracking is recommended to build the skill set necessary for more habitual, less rigid eating patterns.

EXERCISE SELECTION FOR CHEST GROWTH AND HIP THRUSTS

For chest hypertrophy, dumbbell bench press and low incline dumbbell press are favored over barbell bench press due to potentially longer range of motion and better isolation of the pecs. Machine-based exercises like the pec deck and cable flies are also recommended for matching strength curves. Extended range of motion push-ups are suggested as an effective alternative. Hip thrusts are praised for glute hypertrophy and can indirectly benefit the squat by increasing glute size. However, their direct transferability to the squat's sticking points is limited, whereas they show more direct benefit for deadlift lockout strength.

EVIDENCE THRESHOLDS FOR NEW STRATEGIES RESEARCH

Adopting new training or coaching strategies requires careful consideration of evidence. A single study, even with a large effect size, is generally insufficient; multiple replicated studies are preferred. The quality of research, sample size, and consistency of findings across different study types (e.g., small vs. large samples) are critical. The risk-to-benefit ratio of a strategy also plays a significant role; low-risk, easy-to-implement interventions (like static stretching between sets) require less rigorous evidence than new supplements, which carry financial and potential safety risks. Contradictory findings require further investigation, especially when they challenge established 'gym wisdom'.

Common Questions

Research indicates no conclusive performance benefit from fasted training. While low-intensity cardio in a glycogen-depleted state might enhance aerobic adaptations, high-intensity fasted training can negatively impact performance and overall adaptations. For convenience, low-intensity fasted cardio is generally fine if a set amount of work is to be performed.

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