Powerlifters do not need to be exercise scientists, but understanding how your body makes energy explains a lot about why your training works the way it does. Your body runs on two broad systems, aerobic and anaerobic, and knowing which one powers your lifts tells you how to train and recover smarter.
The Two Systems in Plain Terms
The anaerobic system produces energy fast and without oxygen, and it powers short, hard efforts. A heavy single, a max attempt, a tough set of five, those all run anaerobically. The aerobic system uses oxygen to produce energy more slowly and powers longer, lower intensity work like a walk or an easy bike ride. One is built for short bursts of force, the other for sustained effort.
Powerlifting Is Anaerobic
Every lift you compete is over in seconds, which means powerlifting lives almost entirely in the anaerobic systems. Your strength comes from your body making energy fast and producing maximal force in a short window. This is why your training is built around heavy weights, low reps, and full rest between sets, not long grinding cardio.
Why the Aerobic System Still Matters
Here is what most lifters miss. Even though you compete anaerobically, your aerobic system runs your recovery. It is what refills your energy between sets and helps you bounce back between sessions. A powerlifter with zero aerobic base gasses out between heavy sets and recovers slowly. A little aerobic conditioning makes you a better lifter by letting you train harder and recover faster.
Train your strength anaerobically, since that is what you compete with. But do not ignore your aerobic base, because it is the engine behind your recovery. The rest of this series breaks down each system and how to train it.