Why Your Swim Is Holding You Back (And How to Fix It Without More Pool Time)
by The Next Race
The swim is the shortest leg of a triathlon. For most age-groupers, it's also the most expensive.
Not in time — the gap between a fast swimmer and a slow one over 1.5km might be four minutes. That's significant, but it's recoverable on the bike. The real cost of a poor swim is what it does to everything that comes after it. An anxious, inefficient swim burns energy you were supposed to spend on the bike. It spikes your heart rate into zones that take 10 minutes to recover from. It puts you in a mental state that colours the entire race.
The swim isn't just about the swim.
Why more pool time often doesn't help
Most triathletes who struggle in the water do more of the same thing: swim more lengths. If they're slow, they add a third session per week. If that doesn't work, they add a fourth.
This rarely works. Swimming slowly for more hours mostly makes you better at swimming slowly. Fitness is not the primary constraint for most triathlete swimmers — technique is. And technique doesn't improve through volume. It improves through deliberate practice of the specific movements that create propulsion.
The single most common flaw in triathlete swimming is a low body position. The legs sink, creating drag, which means you're working against water resistance rather than through it. More swimming doesn't fix a low body position. Specific drills do.
The drills that actually matter
Kick sets with a kickboard reveal exactly how much propulsion you're generating with your legs — and for most triathletes, it's close to nothing. This isn't a problem to fix; it's information. Triathletes who know they have weak kicks can compensate by using a pull buoy more in training and focusing kick effort on rotation rather than propulsion.
The catch-up drill slows the stroke down enough that you can feel each phase separately: entry, catch, pull, push, recovery. If you don't know what a good catch feels like, you can't replicate it at race pace. This drill makes it tangible.
Single-arm swimming forces you to balance your stroke. Most triathletes pull harder on one side, creating a slight drift that means you're swimming slightly longer than the course distance without realising it. One session per week with single-arm sets will expose and eventually fix this.
Open water is a different sport
Pool swimming and open water swimming share the same stroke, but almost nothing else. The absence of a black line on the bottom, the temperature, the other bodies, the chop, the inability to grab a wall — all of it changes the experience fundamentally.
Athletes who train exclusively in pools and race in open water are not prepared. They're fit, but they're not prepared.
Sighting is a skill. Every time you lift your head to look for a buoy, you disrupt your stroke and lose momentum. Athletes who sight poorly add metres to every race. The goal is to sight as infrequently as possible — every six to eight strokes — and to incorporate the lift into the stroke rather than stopping to look.
Practise this in the pool first: every eight strokes, lift your eyes just above the water level before rotating to breathe. It feels unnatural at first. It becomes automatic with repetition.
The one thing that changes everything
If you've done everything above and the swim still fills you with dread, the issue might not be technical. It might be comfort.
Open water anxiety is extremely common and almost never talked about among triathletes, who tend to project confidence about things they're actually quite afraid of. Getting your face cold, losing visibility, being surrounded by other swimmers — these are stressful stimuli, and stress burns energy.
The fix is exposure, not volume. Get into open water more often. Don't swim hard — just swim. Swim short, swim relaxed, swim until being in open water feels like a normal thing rather than an emergency. That acclimatisation has more impact on your race-day swim than any additional pool session.
You don't need more pool time. You need better pool time, and more open water.