The science behind the program. Blocks, load, recovery.

PALOFIT's training engine is built on researched principles. For each one, we explain what the research says and what it means for your training. You will find linked sources at the end of this page.

Four principles

  • Next workout: +2.5 kg

    Progressive overload

    Research
    Muscle and strength improve as training demands gradually increase. You can add weight or reps: in an eight-week comparison, both approaches improved muscle and strength by similar amounts.
    In PALOFIT
    When every set reaches the top of its target rep range, the weight goes up next time: +2.5 kg for lower-body and +1.25 kg for upper-body compound lifts. Until then, you build reps at the same weight.

    Plotkin et al. 2022, PeerJ

  • Every 6th week: deload

    Periodization

    Research
    Long-term progress calls for planned variation: training load rises in phases, with time for the body to recover in between.
    In PALOFIT
    The program runs in 6-week blocks. Set volume builds through weeks 1–5. Week 6 is a deload, with about half as many sets and slightly lighter weights. Some exercises change between blocks; the main lifts change last.

    Bompa & Buzzichelli 2018; Haff & Triplett 2016 (NSCA)

  • Technique reset −10%

    Autoregulation

    Research
    The right load varies from day to day. In a six-week comparison, strength improved more when progression followed actual performance rather than a fixed schedule.
    In PALOFIT
    The program remembers every set. After a workout, you say whether it felt easy, right or hard, and weights do not rise after a hard session. If you miss the target twice at the same weight, we offer a technique reset: one workout at 10% less weight to help you move forward.

    Mann et al. 2010, Journal of Strength and Conditioning Research

  • Rough night → lighter workout

    Training that adapts to recovery

    Research
    Several nights of short sleep can reduce strength in multi-joint exercises. In a Finnish study, endurance training guided by morning heart-rate variability (HRV) improved maximal running speed more than a fixed program.
    In PALOFIT
    With your permission, sleep, resting heart rate and HRV, compared with your own 7-day baseline, inform daily readiness. When readiness is clearly below normal, PALOFIT suggests a lighter workout: one fewer set and 20% lighter weights. The choice is yours.

    Knowles et al. 2018, Journal of Science and Medicine in Sport; Kiviniemi et al. 2007, European Journal of Applied Physiology

Muscle growth by weekly sets
Fewer than 5 sets5–9 sets10+ sets

Average muscle growth by weekly sets per muscle group. Schoenfeld, Ogborn & Krieger 2017, Table 2 (15 studies). The difference between the three groups was suggestive; each additional weekly set was associated with an average 0.37 percentage-point increase.

How a 6-week block is built
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Weekly set volume, peak week = 100%. Five weeks of build, then a deload in week six. Numbers show the weeks.

How the program is tailored to you

  • Weekly volume: the starting point is 8–12 sets per muscle group, depending on your goal. It is adjusted for your experience, age and available training time.

  • Training frequency: each muscle group is trained about twice a week when you train at least two days. Twice a week builds more muscle than once a week.

  • Experience and age: beginners start with a more moderate volume. For people over 40, volume and rest periods are adjusted to support recovery.

Sources

Studies

Books

  • Brad Schoenfeld, PhD

    Science and Development of Muscle Hypertrophy

    2nd edition, 2020, Human Kinetics. A textbook on hypertrophy research.

  • Mike Israetel, James Hoffmann, Chad Wesley Smith

    Scientific Principles of Strength Training

    Renaissance Periodization. Principles of strength training: overload, fatigue management and variation.

  • Eric Helms, Andy Morgan, Andrea Valdez

    The Muscle and Strength Pyramid (Volumes 1 and 2)

    An evidence-based model for prioritizing training and nutrition.

  • G. Gregory Haff, N. Travis Triplett (eds.)

    Essentials of Strength Training and Conditioning

    4th edition, 2016. NSCA textbook and a source for the CSCS certification.

  • Tudor Bompa, Carlo Buzzichelli

    Periodization: Theory and Methodology of Training

    6th edition, 2018. A foundational book on periodization.

Important note

PALOFIT is an educational and training aid. It does not replace physical therapy, medical advice or medical diagnosis. If you have health conditions or injuries, consult a healthcare professional before starting training.

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