May 27, 2026

How to Lose Weight: sleep

Lessons from a Fit life.

Welcome to common sense weight loss advice from Boston’s (South End’s) best Personal Training studio.

We’re taught losing weight is hard. You have to hustle. Non Stop. Up early. Work out. Sweat. Sacrifice.

It’s exhausting. If only there were a few easy things we could do to lose weight…

Like sleeping. Sleeping is easy.

Sleeping is easy

While Hustle culture glorifies sleep deprivation, is sleeping actually a non negotiable key to a healthy, happier, AND trimmer you?

The science is clear: Quality rest is essential to weight loss and weight maintenance. A synopsis of weight loss studies that monitored sleep (in addition to diet and exercise) found that better (less disturbed, more continuous), longer (7+ hours nightly) sleep increased the likelihood of meaningful weightloss by 33%.

And allll this time I thought sleep was getting in the way of my 24/7 grind. Hustle Culture is failing me.

But How

How does sleep improve weight loss outcomes? The reasons are myriad; let’s highlight a few.

  • Sleep restriction increases hunger and appetite by altering metabolic and endocrine function; glucose and insulin sensitivity decreases and the evening levels of cortisol and ghrelin increase, while leptin decreases.
  • Sleep duration may be associated with an increase in physiological hunger cues. Extending sleep duration past 6.5 hours for over 2 weeks resulted in participants consuming over 270 fewer daily calories.
  • Sleeping only one fewer hour per night negatively altered fat metabolization.
  • impaired sleep compromises serotonin (happiness hormone) production; that makes us more likely to reach for those sugary, salty foods that bump up serotonin production.
  • Workouts get worse. Gym attendance, power output and recovery quality all decrease amongst the sleep deprived.

Remember…

You can’t lose weight properly while sleeping poorly. 70% of weight lost whilst sleeping poorly will come from lean muscle mass, not fat. When you’re under rested your body stubbornly holds on to fat.

But hustle culture says…

But Hustle Culture says my dream’s more valuable than sleep, that I can rest when I’m dead; sleep is for wimps; and although good things may come to those who rest, it’s only those things left behind by the hustlas.

Sleep is lazy; Grind 24/7.

Does it ever sound to you like hustle culture is over compensating for something?

Me, I’ll side with Dr Andrew Huberman who said, “Sleep is not a luxury; it is a non-negotiable biological necessity and the foundation of performance.”

Now Don’t quit your workouts and hop in the sack. Keep working out intelligently, but when you’re done go to bed early.
Your work will still be there in the morning… go to sleep.
Your binge watch can wait… rest.
Put down your doom scrolling. Close your eyes.
Don’t even finish this video. Put down your…

Related: No Bliss on the Couch: Sleep and Recovery · Is Sleep as Important as Working Out?

About the author

Stephen Allison

Stephen Allison founded Fit, a private personal training studio in Boston’s South End, after more than 20 years of coaching clients one-on-one. He trains runners, lifters and everyday athletes.

Want a coach in your corner? Train one-on-one with Stephen or another Fit trainer. Your first 45-minute session is free.

Keep reading

If there were one small thing that improved your sleep, kindled vivid dreams nightly, enhanced mental health and assisted weight loss, would you be interested? It won’t cost much; nor will it take up much time. You in? Are you ready to make your own yogurt? You probably thought I was selling you a pill. Nah, Homie, it’s a yogurt maker. Unfortunately it’s not covered by insurance.
Nutritional advice changes pretty quickly. One minute they’re telling us to fast, then fasting can kill us, then, wait a minute, fasting is back; only this time make it an olive oil fast.
Megan is using a continjous glucose monitor in an attempt to improve her already formidable fitness. I sent her some questions I had about the CGM. You can read her answers below.

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