I've been a personal trainer for coming up to 15 years. Whilst many people seek out a personal trainer for a change in body composition, very few realise that the greatest benefits they will often obtain will be of a restructuring of their brain. The body's HQ, decision maker, and great leader.
I've also been a bit of a nerd for a lot longer, and at SISU we're a huge believer in embracing who you are and banishing negative stereotypes, so bear with me whilst we go on a nerd journey.
If you've ever seen Lord of the Rings, there is a scene where the Theoden, a king (and in this metaphor, your brain) is manipulated by his chief advisor (in this case your thoughts).
King Théoden sits slumped on his throne, aged beyond his years, drained of vitality. The greatest warrior-king of his generation—reduced to a shell. His advisors whisper poison. His strength is gone. His hope is dead. He believes the lies. Then Gandalf arrives. And with one intervention, the spell breaks. Théoden stands. He grabs his sword. The corruption lifts. "I know your face," he says, seeing clearly for the first time in years.
This is what depression and anxiety do to your brain. And exercise? Exercise is Gandalf.
Not because it's magic. Because it breaks the neurochemical spell that's been whispering lies to you for months, maybe years. The spell that tells you you're weak, that there's no point, that you're too far gone. The spell is real. The corruption is measurable. And the way to break it isn't just "thinking differently" but in changing the biology that's been hijacked.
When clients come to me saying they want to lose weight or build muscle, most don't realize they're actually seeking something deeper. The body transformation is just the surface. What they really need is to break the spell—and the barbell is just the tool to get there. It takes a great wizard (Exercise) to banish the thoughts and change the environment to allow the king to flourish again.
That was a pretty loose metaphor but I'll back it up with more than just fantasy Lore.
I've been a personal trainer for 15 years, and I can't count how many clients have walked through my door looking like Théoden on that throne. Slumped. Defeated. Convinced they're too far gone. They tell me they want to "get in shape." But after a few weeks of training together, the conversation always shifts.
They stop talking about abs and start talking about their anxiety lifting. They stop obsessing over the scale and start telling me they're sleeping through the night for the first time in months. They came for physical change and left with mental clarity. It's incredibly refreshing to see. Just like Théoden, there's a moment where I see the spell breaking. They stand a little taller. Their eyes are clearer, their purpose is stronger and you see a break of a smile when they look in the mirror. That's the power of SISU, and that's the power of exercise.
For the science behind my Lord of the Rings rant see below:
*University of South Australia study (2023): Physical activity is 1.5x more effective than counseling or leading medications for depression
*Singh, B., et al. (2023). "Effectiveness of physical activity interventions for improving depression, anxiety and distress." British Journal of Sports Medicine.
*PMC Article "The Role of Exercise in Management of Mental Health Disorders"