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Principles
Principles

Principle of Variation of Training

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variationperiodizationplateaustimulusadaptation

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DefinitionA short reference note, not a full lesson.
Definition

Varying the stimulus — load, volume, exercise, even contraction type — is the key driver of adaptation; holding variables fixed causes plateaus.

Detail

Variation in the volume and intensity of training (periodization) is extremely important for optimal gains in strength. Variation of the stimulus seems to be the key ingredient affecting change in muscle tissue and in neural factors. Proper use of cycling concepts allows better development of strength and power. There is an inverse relationship between the volume and intensity of training across phases.

Several means of varying training are useful for optimal gains in strength and size:

  • Slight variations in foot, hand, or other body-part position that do not affect the lifter's safety.
  • Using several different exercises to assure continual increases in strength.
  • Using several different types of muscular contraction (e.g., concentric, eccentric). A combination of concentric and eccentric actions — rather than concentric-only training — produces superior strength gains.

When training variables are not changed, plateaus result. If a user fails to change training variables for a long period, plateaus in strength and power gains will occur (Fleck & Kraemer, 1997). One system of training will not work optimally for all individuals and muscle groups, and the indefinite use of one program leads to plateaus in progress and overtraining; optimal gains come from mixing programs and manipulating short- and long-term variables appropriately. Periodized programs using multiple sets appear superior to using the same multiple-set system for the entire training period (Willoughby, 1993).

Key facts

  • Varied stimulus is the key ingredient affecting change in muscle tissue and neural factors.
  • Inverse relationship between training volume and intensity across cycles.
  • Means of variation: body-part position, choice of exercise, type of muscular contraction (concentric + eccentric > concentric only).
  • Unchanged variables → plateaus in strength and power.
  • Indefinite use of one program → plateaus and overtraining.

Connections

Go deeperMuscle Hypertrophy

Sources

Historical reference · reference manual (page cited)
p.46p.56p.300p.656
Cited authorities in source: Fleck & Kraemer (1997); Willoughby (1993); Stone et al. (1981) for periodization context.

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Atlas Connections

Muscle Hypertrophy
Hypertrophy is muscle growth from existing fibres getting bigger. In practice it comes from doing enough hard sets (about 10 or more per muscle per week) taken close to failure, over months. The exact load, frequency and fancy techniques matter much less than people think.
Principle of Individuality (Individual Differences)
Genetics, starting fitness, and other personal factors mean people adapt to the same program at different rates — programs must be matched to the individual.
Principle of Progression (Progressive Resistance)
Progressive resistance is the single most important strength principle — raise the load gradually (about 5% at a time) once you can hit the top of your rep range.
Principle of Progressive Overload
To keep improving, gradually make training harder than your body is used to: more weight, more reps or more sets. You don't need to add weight every week or go to failure. Small, steady increases you can recover from are what work.
Intensity
The amount of weight (resistance) lifted — also shaped by speed, reps, sets, rest interval, and workout duration.
Volume
How many — not how heavy. Volume is the total amount of exercises, sets, and reps performed, and moves inversely to intensity.
Periodization (Cycle Training)Closely related
Planned variation of training volume and intensity across distinct phases to drive optimal long-term gains in strength and power.