What is the work-to-rest ratio commonly used for the glycolytic system?

• A. 1:1
• B. 2:1
• C. 1:3
• D. 1:2

Answer: (D)

The glycolytic system powers high‑intensity efforts that last roughly 10 seconds to a couple of minutes, so training it involves repeating short, hard bouts with enough rest to recover parts of the energy you used but still keep the intensity glycolytic. A work-to-rest ratio around 1:2 is commonly used, meaning for every 20–30 seconds of work you rest about 40–60 seconds. This setup lets you sustain multiple hard efforts by partially restoring energy stores and allowing some lactate clearance, while not resting so long that the session becomes predominantly aerobic. Shorter rest (1:1) can leave you too fatigued to complete the next bout, and longer rest (1:3) reduces the glycolytic stimulus too much, shifting training toward aerobic adaptation.