Slow Down to Go Faster: 5 Critical Mistakes New Swimmers Make (And How to Fix Them)

If you can doggy-paddle across a pool without sinking, you might feel confident signing up for your first triathlon. After all, how hard can a 400-meter swim really be when you already run and ride every week? Australian swimming coach Brenton Ford has watched that confidence dissolve at the water's edge more times than he can count — and a few of those athletes have needed a support boat to finish their swim leg.

Swimming is widely considered the hardest of triathlon's three disciplines for anyone who didn't grow up competing in the water. The learning curve is real, and unlike cycling or running, mistakes in the pool don't just slow you down — they can lead to shoulder injuries, early burnout, or genuine safety issues on race day. The good news? Most beginner mistakes follow predictable patterns, and every single one of them is fixable.

Ford is the founder of Effortless Swimming, a coaching platform with more than 420,000 YouTube subscribers and 380,000 Instagram followers. He sat down with Slowtwitch to break down exactly what he sees new swimmers and triathletes getting wrong — and what to do instead. Whether you're training for your first sprint tri or chasing a long-distance race, these insights will save you time, prevent injury, and build the water confidence that makes race day genuinely enjoyable.

Mistake #1: Buying the Wrong Gear (Your Equipment Is Working Against You)

Walk into any tri shop or scroll through any online store and you'll find a wall of swimming accessories promising faster, easier movement through the water. For beginners, the temptation to gear up completely before jumping in is understandable — but Ford says that impulse often backfires. The wrong equipment doesn't just fail to help; it actively teaches your body bad habits.

Long Fins: A Shortcut That Creates a Dead End

Fins are a legitimate training tool, and you'll find them in the bags of elite swimmers and Olympic-distance triathletes alike. The problem isn't fins themselves — it's the long variety that beginners tend to reach for first.

"They can really help with your kick, but they change how you use your legs," Ford says.

Long fins are buoyant and powerful, which feels great in the water. But that same buoyancy alters the timing and rhythm of your kick in ways that don't translate to finless swimming. When you eventually race without them (which is always), your kick mechanics are off.

The fix is simple: choose short fins instead. "The short fins don't change your kick timing and rhythm," Ford explains. You still get resistance feedback and some additional propulsion, but your kick stays honest. Short fins build the skill; long fins build a dependency.

Thick Pull Buoys: False Hips, Weak Core

Pull buoys are designed to float your hips so you can isolate your upper body pull without worrying about your leg position. That sounds like a good idea — and for experienced swimmers, it often is. But Ford warns against the wide, thick pull buoys that dominate beginner shelves.

"The really wide pull buoys can keep your hips up, which is great, but they also keep your legs a long way apart," he says. "When that happens, you won't engage your core as well as you would with a slimmer pull buoy, so you just end up being disconnected through the middle of your body."

Your core is the bridge between your upper and lower body in the water. If a pull buoy is doing all the stabilization work, that bridge never gets built. Opt for a slimmer pull buoy that supports your position without spreading your legs so far apart that your torso checks out of the conversation.

💡 Visual tip: Hold a slim pull buoy between your thighs and notice how it requires some muscle engagement to keep it in place. A thick buoy between your knees? You're just floating.

Oversized Hand Paddles: Fast Track to a Shoulder Injury

Hand paddles amplify every pulling force your arms generate in the water — which is exactly why they're dangerous in the wrong hands. A paddle that's too large for your strength and technique level places enormous stress on your shoulder joints, and that stress multiplies quickly if your catch mechanics are off (which they often are for beginners).

Shoulder injuries are the most common overuse issue among swimmers, and they're almost entirely preventable at the beginner stage. Before you buy paddles, consult a coach or experienced swimmer who can match the size to your current ability level. A properly fitted paddle is a useful tool. An oversized one is a shoulder injury waiting to happen.

Mistake #2: Windmilling Your Arms and Fighting the Water

Watch a strong swimmer from poolside and you'll notice something that feels counterintuitive: they don't look like they're trying very hard. Their stroke is smooth, unhurried, almost casual — yet they glide past everyone else in the lane. New swimmers see that efficiency and draw completely the wrong conclusion about how to replicate it.

The Windmill Trap

"A lot of people feel like the faster they move their arms, the faster they'll go," Ford says. "They're not accounting for the drag factor of water."

Water is approximately 800 times denser than air. Every extra movement you make — every splashy, rushed arm rotation — creates resistance that your body then has to overcome. Beginners tend to keep their torsos flat, spinning their arms in rapid circles, generating maximum effort for minimum speed. It's exhausting and inefficient.

Slow Down to Go Faster

Ford's counterintuitive prescription: slow your arm rate down and rotate your torso.

With each stroke, your body should rotate from side to side, rolling toward the pulling arm and reaching long rather than slapping fast. Think of it as a controlled pivot from your hips, not just a shoulder wiggle. That rotation gives your arm a longer reach — which means more water caught per stroke — and transfers power from your core, not just your arms.

"We want to accelerate through the underwater phase of the stroke," Ford explains. "It's almost like a waltz with the timing. It's a one-two-three, one-two-three, as opposed to just this constant turnover of the arms with no change in speed."

The waltz analogy is useful. There's rhythm, there's a pause, there's intentional acceleration at the right moment — and then the pattern repeats. That's the opposite of windmilling.

The paradox that unlocks everything: relaxing your stroke allows you to reach further, rotate more, and expend less energy per meter traveled. Less frantic effort equals more speed. If you remember nothing else from this article, remember "slow down to go faster."

💡 Try this drill: The catch-up drill — where one hand waits at full extension until the other arm catches up to it — forces you to pause between strokes and feel the glide. It's uncomfortable at first and deeply effective at breaking the windmill habit. For more game-changing drills to elevate your swimming performance, explore our training content.

Mistake #3: Skipping Warmups and Skipping Rest

Swimming is low-impact. No pounding pavement, no clipping in and out of pedals. For that reason, many beginner triathletes assume they can jump into swim workouts without the care they'd give a hard track session. Ford calls this assumption out directly — and the consequences show up as shoulder pain, elbow aches, and workouts that feel harder than they should.

Swimming Straight Through Without Intervals

"I think newbies tend to swim a kilometre or two, just straight," Ford says. "No breaks in between and all at the same pace. Swimming without intervals isn't going to give their muscles enough recovery time."

Continuously loading the same muscles at the same pace doesn't just limit improvement — it sets up overuse injuries that develop gradually and stick around for weeks. Structure your sessions with intervals: swim a set distance, rest 15–30 seconds, repeat. Your technique holds longer, your muscles recover between efforts, and you actually adapt faster than you would grinding out straight laps.

The Morning Warmup You're Skipping

This one is especially relevant if you're squeezing swims in before work. Rolling out of bed, driving to the pool, and immediately launching into hard effort with stiff muscles and a half-awake nervous system is a reliable path to injury.

"If you've only been up for half an hour and you're still getting the body moving, then yeah, that's an issue," Ford says. "You need to ease into the workout, but I see a lot of people just going for it and not warming up on the deck or in the water."

A meaningful warmup doesn't need to take 20 minutes. Ford recommends a two-part approach:

On the deck (2–3 minutes):

• Band work for shoulder mobility
• Arm circles and dynamic chest openers

In the water (5–10 minutes):

• Several easy laps at a comfortable, conversational pace
• Light drill work: kick sets, fingertip drag, catch-up

That's it. Twelve minutes of preparation can prevent twelve weeks of shoulder rehab. The warmup isn't optional — it's part of the workout.

Mistake #4: One Swim Per Week and Calling It Training

Here's the frustrating truth about learning to swim as an adult: one session per week will produce early results, and then it will produce almost nothing. You'll improve noticeably in the first few weeks, feel great about your progress, maintain your once-weekly schedule — and then plateau hard.

Why Frequency Matters More Than Duration

Ford is direct: "You need to try to be consistent within a week where maybe you get two or three swims in rather than just one. The body will start to adapt and develop that feel for the water and that comfort if you can spread it across two or three swims instead of just one."

Swimming is a skill sport first and a fitness sport second. Skill development follows the principle of distributed practice — your nervous system encodes movement patterns more effectively when exposed to them multiple times over a week rather than in one long session. Two 35-minute swims will do more for your technique than one 70-minute swim, even if the total water time is identical.

The goal isn't to become fast. It's to become comfortable. "Feel for the water" — that phrase coaches use constantly — refers to a tactile, intuitive connection with the aquatic environment that only comes from repeated exposure. You can't binge it on weekends.

The Cycling-Running Fitness Trap

This one catches triathletes specifically, and it's common enough that Ford has seen it play out "so many times." You've been logging solid miles on the bike, your run is strong, and you figure your overall fitness will carry you through a 400-meter swim.

"They think they're fit enough because they bike and run," Ford says. "Then they get to the race and they struggle a lot, even if it's just a 400-metre swim. That's a big wakeup call."

Cardiovascular fitness from cycling and running does not transfer meaningfully to swimming. Different muscle groups. Different breathing patterns. Different energy systems in practice. A 45-minute easy ride is nothing like 400 meters of open-water swimming when your heart rate spikes at the gun, the pack surges around you, and you can't see the bottom.

Ford doesn't mince words about where this gap can lead: "Some of these people get in a bit of trouble on race day and need the support boats."

What "Enough Swimming" Actually Looks Like

Minimum effective dose for beginners:

• 2–3 swims per week, 30–45 minutes each
• At least one session with structured intervals
• At least one drill-focused session
• Add a fourth swim once 3x/week feels sustainable

You don't need to train like a competitive swimmer. You need to feel safe, confident, and capable from the race start to the swim exit. That's the bar — and 2–3 sessions per week is how you clear it.

Putting It All Together: Your Action Plan

Progress in the water is genuinely available to anyone willing to address these mistakes methodically. Here's the priority order Ford's advice points toward:

This week:

1. Schedule a swim with a coach or experienced swimmer for a stroke assessment
2. Plan two or three swims for next week — block the time now
3. Pull up Effortless Swimming on YouTube and watch one video on rotation or body position

This month:

1. Establish your 2–3x/week rhythm and protect it
2. Get properly fitted for equipment (with guidance, not just an online cart)
3. Record a short video of your stroke from the pool deck for self-review

This quarter:

1. Demonstrate improved torso rotation and a slower, more deliberate arm rate
2. Complete at least 12 swims at your new frequency
3. Prepare for your first open-water experience — ideally a supervised group swim

Quick-Reference Checklist

Use this before each swim:

• [ ] Warmed up on deck (bands, arm circles)?
• [ ] Starting in the water with easy laps before hard effort?
• [ ] Workout structured with intervals, not just straight sets?
• [ ] Focusing on rotation with each stroke?
• [ ] Avoiding the urge to windmill when tired?
• [ ] Using short fins instead of long fins (if fins are in the plan)?
• [ ] Equipment appropriately sized for current ability?

The Bottom Line

Swimming rewards patience and punishes panic — in training and on race day. The five mistakes Brenton Ford identifies share a common thread: beginners tend to add more when they should do less. More arm speed. More gear. More distance in one go. Strip back to the fundamentals, build frequency before volume, and let the water meet you halfway.

Source: Slowtwitch — The Most Common Mistakes New Swimmers Make