IFPA Trainer Practice Exam 2025 - Free Trainer Certification Practice Questions and Study Guide

The three energy systems used during exercise are correctly identified as ATP-CP, anaerobic, and aerobic systems.

The ATP-CP system, also known as the phosphagen system, provides immediate energy for high-intensity, short-duration activities, such as sprinting or heavy lifting. This system relies on stored ATP and creatine phosphate to rapidly regenerate ATP, making it essential for explosive movements that last up to about 10 seconds.

The anaerobic system, often referred to as anaerobic glycolysis, kicks in to provide energy for activities lasting from about 10 seconds up to 1-2 minutes. It breaks down glucose into lactate for energy without the need for oxygen, which is important during high-intensity efforts, like intense intervals or multiple sets of exercises performed in a row.

The aerobic system is utilized during lower-intensity, longer-duration activities. It generates energy by using oxygen to break down carbohydrates and fats, supporting sustained efforts that last beyond a couple of minutes, such as running or cycling at a steady pace.

Other options do not accurately represent the energy systems used during exercise. Cardio, strength, and endurance systems are types of training or exercise modalities rather than energy systems. Similarly, speed, agility, and flexibility refer to