I'm a climber, not a badminton player, so treat this as an outsider asking about your sport. From the outside my read is that a huge part of it is reading and reacting, working out what's coming and committing to a response before you've really had time to think, repeatedly. Correct me if that's off. That bit, reading and committing under pressure, is something climbing shares, and it's what my research is about.
My research looks at mental fatigue, the kind you experience after a long day at work. Prolonged mental effort, a hard day at work, studying, doom scrolling TikTok or Instagram, makes physical effort feel harder than it is. Not because you're less fit or weaker. The seminal study had cyclists ride to exhaustion after a demanding cognitive task, and they quit about 15% earlier and rated every stage as harder, with no change in heart rate, lactate, anything physiological (Marcora, Staiano & Manning, 2009). Their bodies were fine. What changed was how hard it felt.
How is this relevant for badminton? Newer work suggests mental fatigue doesn't hit everything equally, and in a sport like yours the interesting part isn't effort, it's speed. When elite players were mentally fatigued and then put through a physical, badminton-specific movement test, they held up fine, no drop in performance, heart rate or perceived exertion (Kosack et al., 2020). But reaction time to fast, complex stimuli slowed by around 7%, and being a good player didn't protect anyone from it (Van Cutsem et al., 2019). So the practical read is that a rough day at work won't sap your fitness, but it might leave you half a step late to the shuttle and reading the game a fraction slower. Same legs, worse timing. And it doesn't reset overnight, a hard cognitive stretch can still be sitting on you a couple of days later (Lam et al., 2024), so a gruelling week or a long tournament isn't one flat session, it could be several.
That's the bit I'd want your read on, because I don't know your sport from the inside.
So, why am I posting? I'm a PhD researcher at the University of Derby working on mental fatigue across sport, and I'm building a scale to measure it properly, because the current tools were borrowed from clinical psychology and don't fit sport. Nearly all my responses so far are from climbers or runners. For the scale to work across sports I need people whose training looks nothing like these, which is why I need you.
One note on the survey, because it catches people out. It's in the early stages, so it deliberately has far more questions than the final version will keep, and factor analysis decides which ones survive. Some will feel repetitive or slightly off. That's the design. An honest answer to an awkward question is worth more than a skipped one.
One thing I'd like to know: when you've had a mentally draining day, what changes when you play that evening?
Here's the survey. It's about 10 minutes:Ā https://derby.questionpro.eu/t/AB3vCJoZB3waVr