Fasting daily. Crushing HIIT workouts, but still tired? Doctor shares what's really wrong and what your body needs

You’re crushing workouts, fasting daily, tracking every bite, and popping supplements like a pro—but somehow, you’re still wiped out. High performers often think more effort equals better health, but it can actually backfire. Dr Vassily Eliopoulos, a medical expert, explains why stacking stress instead of building resilience is quietly sabotaging your energy, hormones, and overall longevity. The real fix isn’t doing more—it’s learning what your body actually needs.

The hidden burnout trap

Cold plunges, fasted cardio, HIIT, caffeine binges, and under-eating—these all spike cortisol, your stress hormone. Cortisol itself isn’t the enemy, but chronically elevated levels disrupt sleep, melatonin, testosterone, estrogen, thyroid function, and even your gut and immune system. Basically, when your body is in survival mode, no amount of biohacking can optimise your hormones.

Rethink longevity: recovery first

Longevity isn’t earned by pushing harder. It’s earned in recovery. Dr Eliopoulos highlights what truly matters:

• HRV > step count
  
  
• Breathwork > back-to-back meetings
  
  
• Consistency > intensity
  
  
• Eating enough > over-restricting
  
  
• Sunlight > stim-based focus
  

View this post on Instagram

A post shared by Dr. Vass, M.D. (@dr.vassily)

Reset your baseline

Before adding more to your routine, subtract stress. Track your HRV, test cortisol levels, eat enough protein and carbs, prioritise sleep, soak up sunlight, and treat stress as a signal, not a badge of honor. Small tweaks, smart recovery, and nervous system regulation are the real longevity hacks.

Stop doing more—start doing right

High performance isn’t about endless effort. It’s about giving your body exactly what it needs to thrive. Fasting, workouts, and supplements are tools, but without recovery, they can turn into burnout accelerators. Focus on your nervous system, not just your grind, and you’ll finally feel the energy you’ve been chasing.