When it comes to shedding body fat, most advice revolves around food and fitness plans—but what if movement alone could give you an edge?
Neuroscientist Andrew Huberman, host of the *Huberman Lab* podcast, has spotlighted two surprising, non-exercise movements that can ramp up fat loss in a sustainable, evidence-backed way.
What’s even more intriguing? These techniques—fidgeting and shivering—don’t require long workouts or major diet overhauls.
In a recent podcast episode, Huberman shared how stimulating the nervous system through subtle movements can ignite fat-burning responses in the body.
So, how exactly do everyday actions like bouncing your knee or stepping into cold water influence metabolism? Let’s dive into the science-backed methods Huberman says can make a real difference.
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How Movement Triggers Fat Burning—Even Without Exercise
Huberman explains that certain types of movement can stimulate the release of epinephrine (a.k.a. adrenaline), which promotes fat mobilization and oxidation. This is especially powerful because adrenaline doesn’t just help energy levels—it activates biochemical pathways that encourage fat breakdown.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
“One of the most powerful ways to stimulate epinephrine… is through movement,” Huberman stated. “Shivering is a strong stimulus for the release of adrenaline, epinephrine, into fat… and, the increase in fat oxidation and mobilization.”
This doesn’t mean you need to start sprinting or lifting weights (though those help too). Instead, subtle movements performed throughout the day can make a noticeable impact—starting with something almost everyone does unconsciously: fidgeting.
1. Fidgeting: Small Actions, Big Impact
Fidgeting isn’t just a nervous habit. According to Huberman, subtle, repetitive movements can significantly increase daily energy expenditure, especially when done consistently.
This includes behaviors like:
- Bouncing your knee while seated
- Pacing back and forth
- Standing up frequently
- Performing short, sharp “staccato” steps
- Even spontaneous twitchy movements—finger tapping, foot shaking
“Fidgeting is a good starting approach for those who aren’t big into exercise or don’t exercise often,” Huberman explained.
Huberman refers to research from 2015 and 2017 which used metabolic tracking to show that people who fidget more throughout the day can burn significantly more calories than those who remain still—even when both groups have similar body composition and dietary habits.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
In other words, movement adds up. Especially when it offsets periods of sedentary behavior or even the occasional calorie-heavy meal.
2. Shivering: Activating the Body’s Thermogenic Furnace
The second technique—and possibly the most unexpected—is shivering. This response, triggered by cold exposure, acts like a mini internal workout for your metabolism by activating brown fat.
“When you get into cold and you shiver… those small movements trigger the release of a molecule called succinate,” Huberman shared. “Succinate acts on the brown fat to increase brown fat thermogenesis and fat burning overall.”
Brown fat is a special type of fat tissue with one powerful trait—it’s thermogenic. It burns calories to generate heat. Found mainly between the shoulders and at the back of the neck, it activates in response to cold, helping the body stay warm while amping up energy expenditure.
How to Use Cold Exposure for a Fat Loss Boost
Huberman points out that most people who try cold exposure do it wrong. According to him, simply sitting in a cold bath or taking a single cold shower likely won’t trigger enough shivering to ignite meaningful fat burning.
Instead, he suggests a protocol based on physiological responses:
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
- Choose water temperatures that are “just cold enough to be uncomfortable”
- For some people, this may be 60°F (15.5°C); others may need colder water (down to upper 30s°F)
- Get into the cold water and stay in until you begin shivering
- Exit the water without drying off
- Wait 1–3 minutes, then re-enter the cold water
- Repeat this in-and-out process 2–4 times per session
- Do this 1–3 times per week for best results
This method leverages the body’s natural reaction to cold and encourages it to work harder even after cold exposure ends—through non-shivering thermogenesis and activation of brown adipose tissue.
Important Safety Note
Cold exposure, especially below 50°F (10°C), can be dangerous if not done safely. Always start mild and gradually work up to colder temperatures. People with cardiovascular issues or certain medical conditions should consult a health provider before attempting cold-induced shivering routines.
Are These Methods Effective on Their Own?
Can fidgeting and cold-induced shivering replace regular workouts or clean eating? Likely not. But according to Huberman, they’re valuable tools that can augment other fat loss strategies—or act as pillars for those just starting out with lifestyle changes.
In his words, “It’s unlikely this will compensate for chronic overeating, but it can play a role in helping to offset a meal with a large number of calories.”
Think of them as metabolic “bonuses”—low-effort habits that steadily chip away at body fat when practiced consistently over time.
Final Thoughts: The Power of Intentional Movement
Huberman’s insights highlight a broader truth: movement doesn’t have to be structured—or even intense—to have value.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Whether you’re bouncing a foot under a desk or stepping into a chilly tub, every action counts if it gets your nervous system firing and your body adapting.
While fidgeting and shivering may sound quirky, they’re grounded in real science and offer low-barrier ways to boost your metabolism.
For anyone looking to lose fat with minimal time or effort—these might be the little things that tip the scale.
