Andrea Dacey, RDN, CSSD, Board-Certified Specialist in Sports Dietetics, working with athletes in Boston, MA and San Diego, CA.

Weight Management for Athletes

Most weight loss advice is written for people who aren’t training six times a week. Cut calories, eat less, move more, and hope your energy holds up. For an athlete, that approach doesn’t just risk a bad week of workouts. It can tank strength, wreck recovery, and in worse cases, push someone toward the exact problems we cover on our RED-S and Female Athlete Triad page.

This is weight and body composition work built specifically for people who train hard and need to keep training hard through the process. The goal isn’t just a smaller number on the scale. It’s changing your body without losing what makes you an athlete in the first place.

Why This Looks Different for Athletes

An athlete’s relationship with weight is complicated in ways a generic diet plan doesn’t account for. Some athletes are chasing a weight class. Some want a better power-to-weight ratio for a sport like HYROX or endurance racing. Some are dealing with a body composition change that happened after an injury or a break from training and want to reverse it. And some are just carrying advice from a coach, a teammate, or the internet that doesn’t actually fit their situation.

The common thread across all of these is that performance has to stay part of the equation. A plan that gets you lighter but leaves you flat on the bar, slow on your long runs, or constantly injured hasn’t actually worked, even if the scale says otherwise.

What This Actually Involves

This starts with a real assessment, not a generic calorie calculator. That usually means looking at your training volume, your current eating patterns, and often body composition or metabolic testing to understand where you’re actually starting from instead of guessing.

From there, the plan is built around your training calendar, not against it. Heavier training weeks and lighter ones call for different approaches, and a plan that ignores that tends to fall apart the first time life gets busy or a race gets close. Progress gets tracked against how you’re performing and recovering, not just body weight, because a number on a scale doesn’t tell you whether you’re actually getting stronger or just getting smaller.

Timing Matters More Than People Expect

When you attempt a body composition change matters almost as much as how. Trying to cut weight in the middle of a heavy competitive block usually backfires, you end up under-recovered right when you need to be sharpest. Off-season or lower-intensity periods tend to be a much better window for this kind of work, and part of the initial conversation is figuring out whether now is actually the right time or whether it makes more sense to wait.

When This Isn’t the Right Fit

If what’s going on involves a pattern of restriction, bingeing, obsessive tracking, or a relationship with food and training that already feels out of control, that’s a different conversation, and a more careful one. Our Eating Disorder Support for Athletes page covers that side of things directly. It’s fine not to know which category you’re in before reaching out. Part of the first conversation is figuring that out together.

Getting Started

If you’re weighing whether this is the right fit, that’s a normal place to start. Learn more about Andrea’s background, or reach out through the contact page to talk through your specific situation before committing to anything.

FAQ