From Basements to the BWF: How a Dutch Tradition Became a Tactical Masterstroke

The cellar sessions weren’t born from rebellion—they emerged from necessity. In 2018, head coach Mark Caljouw (then assistant coach) noticed a disconnect between the team’s polished doubles play and their singles athletes’ mental resilience under pressure. “We were winning matches, but not controlling them,” Caljouw told Badminton Magazine in a 2022 interview. “The problem? Our players were too serious.”

The solution? Borrow from Dutch football’s café culture, where players like Arjen Robben and Virgil van Dijk once honed their game over pints in Amsterdam’s back-alley bars. Caljouw repurposed a damp basement beneath the Sportcentrum Zuid training facility in Eindhoven, complete with flickering lights, a makeshift net strung between beer crates, and a jukebox playing Dutch rock. The rules were simple: no suits, no referees, and no fear of failure.

“The first time we played down there, Selena Piek smashed her racket into the wall. We all laughed—then we laughed harder when she won her next match.”

Why it matters: Badminton is a sport of micro-decisions—where a 0.3-second hesitation can lose a point. The cellar sessions force players to trust their instincts, not their technique, under controlled chaos. “We’re not drunk,” clarifies Caljouw. “We’re uninhibited.”

Psychology, Physiology, and the “Dutch Beer Effect”

The sessions aren’t just about fun—they’re rooted in sports psychology. Research from the Journal of Sport & Exercise Psychology shows that moderate social facilitation (laughter, low-stakes competition) reduces pre-match anxiety by up to 40%. In badminton, where singles players often face opponents alone, the cellar sessions simulate the noise of a crowd—without the pressure.

The “beer effect” isn’t literal—it’s about perceived risk. Players like Selena Piek (world No. 3) have described the sessions as “training to lose gracefully.” “If you can joke after dropping a point to a teammate, you can recover faster against a rival,” she said in a 2023 Dutch Badminton Federation interview.

Dr. Jan van der Meer, sports psychologist (Amsterdam University):

“The cellar sessions exploit the ‘challenge state’ in athletes. The brain associates the environment with play, not performance. That’s why Piek’s serve speed increased by 5 km/h after these sessions—her subconscious relaxed.”

How the Netherlands Are Using Chaos as a Weapon

The Dutch team’s success isn’t just cultural—it’s tactical. Here’s how they’ve weaponized the cellar approach:

1. Doubles Synergy: In mixed-gender cellar sessions, players swap partners mid-match, forcing them to adapt to unfamiliar net play. This directly translates to their dominant doubles strategy (e.g., their 2023 European Championship gold in men’s doubles).
2. Singles Aggression: The low-stakes environment emboldens players to take risks. Piek’s 2024 Orange Dutch Open title featured 18 unreturned serves—up from her career average of 12.
3. Coach-Player Communication: Caljouw uses the sessions to “test” new tactics without pressure. “If Yorick laughs at my suggestion, I know it’s a bad idea,” he jokes.

What’s at stake in Spain: The Dutch team enters the European Championships as the only nation with both singles and doubles players in the top 8. Their cellar sessions have become a mental lab—where they simulate everything from crowd noise (via blaring jukebox) to last-minute substitutions (players “quit” mid-match).

Why the World Isn’t Copying (Yet)

While the Dutch approach has yielded results, it’s not universally replicable. Three key differences set it apart:

Challenge: The BWF’s anti-doping code prohibits alcohol during official training. The Dutch team works around this by scheduling sessions on “off days” and using breathalyzers. “We’re not breaking rules—we’re redefining them,” says Caljouw.

“We’re Not Drunk—We’re Just Dutch”

To understand the sessions’ impact, we spoke with three players who’ve trained in the cellars:

Watch: A rare clip of the cellar sessions (filmed in 2022) where the team plays “beer badminton” with modified rules:

Spain, Sweat, and the Next Cellar Session

The Dutch team’s cellar sessions will pause during the European Championships but resume in September for World Championship prep. Their next official match is a qualifier for the BWF World Tour Finals on June 15 (14:00 UTC) in Antwerp, Belgium.

Your turn: Would you trust a team that trains with beer bottles? Share your thoughts in the comments—or tag @BadmintonNED to ask the Dutch players directly.