Almog Elazary + David Reznik_inSync

In triathlon, the bike leg is where races are won and lost — not just on power, but on position. Spend hours in an inefficient aero setup, and you'll pay for it on the run. Get it right, and everything changes: your power output, your comfort, and crucially, how your legs feel when you rack the bike and start moving.

This is the story of one athlete and one expert who've spent years figuring out exactly that — and what happened when the right equipment entered the equation.

The fitter: where physiology meets performance

David Reznik doesn't fit bikes the way most people imagine. There's no quick eyeball, no ruler and plumb line, no "that looks about right." His process starts long before anyone touches the bike.

A former professional mountain biker and road cyclist, David transitioned into physiotherapy after an injury at the 2003 World Championships. That pivot changed everything. He completed three academic degrees, earned an IOC certification in Olympic athlete treatment, and went on to serve as physiotherapist and biomechanics lead at the Tokyo 2020 and Paris 2024 Olympic Games.

"For me, these three disciplines are not separate — they are layers of the same system. Being a former professional rider allows me to understand the demands from the inside. Being a physiotherapist allows me to identify limitations and risks. And bike fitting is where everything comes together." — David Reznik

His tools have evolved with his understanding. What began with rulers and plumb lines is now a fully wireless 3D motion capture system — capable of precise, real-time analysis of movement under actual riding load.

"I started with very basic, static tools — rulers and plumb lines — focusing mainly on geometry and visual alignment. Today, I work with advanced 3D motion capture systems — evolving from wired setups to fully wireless technologies that allow precise, real-time analysis of movement under load." — David Reznik

Aerodynamics has become an equally central layer. Through wind tunnel work and specialist training, David now evaluates drag and positional efficiency alongside biomechanics — a combination that matters the most in time trial and triathlon, where the aero position is held for hours at a time.

"Through courses and experience working in wind tunnels, I've gained a much deeper understanding of how position affects drag and performance — especially in time trial and triathlon disciplines." — David Reznik

The goal, as David sees it, is to find the optimal intersection of biomechanical efficiency, aerodynamic performance, and long-term sustainability. Not the most aggressive position — the most maintainable one.

The athlete: from national champion to Kona qualifier

Almog Elazary started triathlon at 12. By 17, he'd moved to a boarding school dedicated to the sport. At 18, he was the Israeli national champion at the Olympic distance and racing for the national team.

For years, his world was short-course racing — fast, explosive, tactical. Then, in late 2024, he made the jump to Ironman. His debut at Ironman Cozumel ended with a second-place finish in the pro category and a Kona qualification slot. He didn't need long to decide: this is the distance he wants to race.

The shift from Olympic to full Ironman changes everything about how you have to think about the bike. At sprint and Olympic distances, you can survive a suboptimal position. At Ironman, you cannot. Eight or more hours of racing demand that your aero position is not just aerodynamically efficient — it has to be something your body can sustain without destroying the run.

The fit: adapting the system to the athlete

Almog has been working with David for years — first as a physiotherapy patient, then for bike fitting. When the Sync AB03 entered the picture, the process followed David's established methodology: full biomechanical assessment, analysis of current position across power output, aerodynamics, and comfort, then integration of the new system and a full revalidation in the clinic.

In clinical practice, David sees the consequences of poor positioning daily. It's rarely just a comfort issue — it cascades into injury, chronic pain, and movement patterns that compensate for what the equipment fails to provide.

"In clinical practice, I consistently see the consequences of poor positioning — excessive pressure on soft tissues, upper body instability, compensatory movement patterns, and overload that leads to pain or injury. In many cases, the limitation is not just the athlete — it's the equipment." — David Reznik

What drew him to Sync was a direct response to that problem. The AB03's range of adjustability — pad width, pad angle, fore-aft positioning, and overall stack height — gives him a fitting environment that works with the athlete's body rather than against it. And crucially, one that can keep evolving.

"These are not products designed around trends — they are built to address real issues I see daily in the clinic: pressure distribution, instability, and limitations in positioning. Instead of forcing the athlete to adapt to the system, I can adapt the system to the athlete — and continue adjusting it over time. With most systems, that evolution is limited. With the AB03, it becomes part of the process." — David Reznik

That adaptability is especially relevant at the Ironman level, where the demands on the body change significantly across a full season of training and racing. A position that works in February may need refinement by July. The AB03 makes that refinement precise rather than approximate.

On the road: what actually changed

For Almog, the difference was immediate — and measurable. His previous aero bars created instability: hands and elbows slipping under load, constant micro-adjustments, tension accumulating through the neck and shoulders over long efforts. The AB03's armrest design, which supports both the humerus and forearm, changed that directly. With the upper arm properly anchored, the whole upper body settles — less shifting, less searching for a stable position, less energy spent on things that have nothing to do with going fast.

"My power has increased significantly, and now I can hold the position for much longer without muscle pain after my rides. My hands and elbows don't slip — I feel much more relaxed and stable, and I'm getting off the bike feeling less fatigued." — Almog Elazary

The testing process was thorough. Almog put the AB03 through conditions designed to expose any weakness in the setup.

"I've put the AB03 through its paces across a variety of terrains — from flat, fast stretches riding against the wind with high resistance, to technical rolling hills that require frequent transitions. I also spent significant time on the indoor trainer dialling in micro-adjustments during high-intensity intervals, when form often breaks down." 

"Because the armrests support the humerus and forearm so securely, there is a noticeable reduction in tension through the neck and shoulders. Being able to maintain a rock-solid aero position for longer — without shifting or trying to find the right position — is a game changer." — Almog Elazary

What's next

Almog's 2025 season is built around the full Ironman calendar: Texas, Lake Placid, 70.3 Aix-en-Provence, 70.3 Elsinore, 70.3 St. Pölten, and the Ironman World Championship in Kona — the race he's already qualified for. He'll race Sync throughout.

For David, the partnership with Sync reflects something he's spent two decades working toward: an equipment system that fits into a long-term performance process, rather than requiring athletes to work around it.

That's the idea behind everything here — not a product review, not a one-off test, but a genuine integration of equipment into a high-performance system. Position is everything. Getting there takes the right tools, the right expertise, and the willingness to keep refining.