When you lift heavy weights versus light weights, your muscles seem to use their different types of fibers in about the same way — at least based on how the muscle’s electrical signal changes during the lift.

Compare median power frequency during matched volume heavy-load (≥80% 1RM) and light-load (≤30% 1RM) resistance exercises in healthy adults, with EMG sensors on target muscles (e.g., quadriceps), controlling for fatigue and movement velocity, to determine if recruitment patterns are statistically indistinguishable.

Track changes in median power frequency across multiple training sessions in individuals performing either heavy-load or light-load resistance training over 8–12 weeks to assess whether recruitment patterns converge or diverge over time.

Compare median power frequency responses during matched-intensity contractions between individuals with known high vs. low proportion of type II fibers (via biopsy-confirmed), performing both heavy and light-load exercises.

Use fine-wire intramuscular EMG to directly compare median power frequency changes across different motor unit populations during heavy vs. light-load exercise in the same individuals.

Synthesize published studies comparing median power frequency during heavy-load and light-load resistance exercise to determine if a consistent pattern of similarity exists across methodologies.