In the glycolytic energy system, the typical rest period falls in which range?

• A. 60-120 seconds
• B. 30-60 seconds
• C. 60-240 seconds
• D. 120-240 seconds

Answer: (C)

Rest intervals for glycolytic training are designed to balance sustained high-intensity work with enough recovery to keep the glycolytic system engaged on repeated bouts. The glycolytic pathway powers efforts roughly from several seconds up to about two minutes, producing lactate in the process. To repeat such efforts at a high level, you need enough time for partial replenishment of substrates and for lactate clearance, but not so long that the workout shifts fully into aerobic recovery. A rest window of about 1 to 4 minutes provides that balance, allowing multiple high-intensity intervals with meaningful reuse of glycolytic energy and lactate handling. Shorter rests quickly fatigue the system; much longer rests lessen the glycolytic stimulus.