When you see ATP, the Association of Tennis Professionals, which runs men’s professional tennis tours and rankings. Also known as Association of Tennis Professionals, it pops up next to tournament names, rankings, or training plans, it’s not just random letters—it’s a system. Same goes for WTA, the Women’s Tennis Association, the governing body for women’s professional tennis. Also known as Women’s Tennis Association, it. These aren’t just club names—they’re the backbone of how professional sports are organized. And if you’re hitting the gym, reading workout plans, or following athletes, you’ll run into these all the time. Ignoring them means missing half the context behind your favorite training routines or competition results.
But gym abbreviations go way beyond tennis. You’ll see HIIT, High-Intensity Interval Training, a workout style that swaps long cardio sessions for short bursts of max effort. Also known as High-Intensity Interval Training, it in nearly every fat-loss plan. Or RM, Repetition Maximum, the heaviest weight you can lift for a set number of reps. Also known as Repetition Maximum, it—used by strength coaches to track progress. Even gym abbreviations like DOMS (Delayed Onset Muscle Soreness) or PR (Personal Record) show up in workout logs. These aren’t jargon for experts—they’re shorthand for everyday fitness goals. If you don’t know what they mean, you’re guessing instead of tracking. And guessing won’t get you stronger, faster, or fitter.
Some abbreviations link directly to how you train. For example, Big 5 refers to the five core compound lifts—squat, deadlift, bench press, overhead press, and barbell row—that build real strength. You’ll find that term in posts about building muscle without wasting time. Others, like VO2 max, measure how efficiently your body uses oxygen during exercise—a key metric for runners and cyclists. You don’t need a degree to understand them. You just need to know what they stand for and why they matter. The posts below cover exactly that: real examples from the gym, the track, and the court. You’ll learn what ATP and WTA mean in context, how HIIT fits into a 3-day-a-week routine, and why knowing RM can change how you lift. No fluff. No confusion. Just clear, practical explanations that help you train smarter from day one.
5 5 in the gym means five sets of five reps - a proven strength training method that builds power, not just muscle. Learn how it works, who it's for, and how to start.