Your Cart is Empty

A Dark Night Is Good For You

April 16, 2015 3 min read

That's right, darkness is your friend. We already know that most of us aren't getting enough sleep and it is great that we are paying attention to that and trying to change it but the need for dark is still mostly ignored. Being exposed to regular patterns of light and dark regulates our circadian rhythm. Disruption of this rhythm can increase your risk of developing health conditions like obesity, diabetes and breast cancer.

Light regulates our sleep and wake patterns

falldetoxtrouble-sleeping_woman_night_fall_detox The physiological processes that control our sleep and wake, hunger, activity levels, body temperature, melatonin level in the blood (to name only a few), are called endogenous circadian rhythm. The endogenous circadian rhythm is nearly, but not quite, 24 hours. This rhythm has evolved with us and is deeply connected to our genetic make up. Our bodies rely on the sun to reset this cycle making light and dark very important signals. During the night, in the dark, our temperature lowers, metabolism slows and melatonin rises. When the sun rises, melatonin drops and you start to wake up. If you were to put someone in a dark cave, without any light, the cycle would last close to 24 hours. But over time, without any time cues from the sun, the person would become out of sync with the people outside the cave. In fact, many profoundly blind people -- those who cannot perceive light, must deal with this lack of synchronization on a daily basis.

What does your body do in the dark?

Your body does a lot in the dark. Levels of the hormone leptin, which control hunger, go up meaning you don't feel hungry. Why does this happen? Having evolved without artificial light at night, one theory says that leptin goes up at night because it was better to not be hungry at night, meaning we didn't have to forage in the dark when the risks would be far greater than during the day. In the last several years, it has become clear that the genes that control endogenous circadian rhythm also control a large part of our entire genome. This includes genes for our metabolism (how we process the food we eat), DNA damage response (how we are protected from toxic chemicals and radiation), and cell cycle regulation and hormone production (how our cells and tissues grow). Light at night messes all this up. Exposure to electric light at night has biological links to common modern day diseases like diabetes, obesity, cancer and depression.

Blue light, red light, no light

tablet Not all light is created equal, some make you more awake and alert while others have little effect. Light from the sun is a strong blue (although it does contain other colours) and this is important in the morning when you need to be alert. But when it comes to the evening, blue light is not good. It tricks our bodies into thinking it is daytime and we know that bright blue light has the strongest effect on lowering melatonin. Your tablet, phone, computer or compact fluorescent lamp (CFL) all emit blue light. Using these things at in the evening can prevent your natural physiological transition to night making it harder to sleep and increasing your long term risk for poor health. Red and yellow lights, like that from a candle or a campfire, have little effect on these transitions.

Electricity changed the way we sleep

Before we had electricity, people experienced full spectrum days of sunlight and dark nights. The dark lasted about twelve hours and during this time people slept for eight or nine hours in two separate bouts, and were awake, but in the dark, for another three or four hours. Everything changed with electricity. Outdoor spaces are lit brightly and people use their computers, tablets, televisions and phones at all hours of the day preventing our bodies from transitioning into nighttime physiology. When people leave the city and go camping, they notice an improvement in their sleep. Most of us get too little light during the day and too much at night. We work indoors (most of us) and fail to sleep in a completely dark room so our rhythms don't function optimally. What can you do to help yourself out? Get bright blue light in the morning, ideally from the sun and use dim, longer wavelength (red or yellow) light in the evenings. Sleep in complete darkness. Based on this information, what can you do to improve your sleep?

Leave a comment

Also in BodyRock Store Blog

Image of Bodyrock blog article - What Happens To Your Butt When You Sit All Day?
What Happens To Your Butt When You Sit All Day?

July 14, 2019 3 min read 474 Comments

Do you think your booty looks a little flat? This might be why!
Read More
Image of Bodyrock blog article - 12 Ways To Make Your Belly Flatter By The End Of The Day
12 Ways To Make Your Belly Flatter By The End Of The Day

July 08, 2017 4 min read 39 Comments

Read More
Image of Bodyrock blog article - 7 Ways To Stop Binge Eating In It's Tracks
7 Ways To Stop Binge Eating In It's Tracks

June 22, 2017 2 min read 1 Comment

Do you ever find yourself knuckle-deep in a bag of Cheetos?
Read More
Shipping & Delivery

Due to COVID-19, shipping systems the world over are experiencing abnormal delays. There is an enormous demand on postal and delivery services as online shopping has skyrocketed, due to store closures and stay-at-home mandates. This is an unprecedented situation, and we are working around the clock to fulfill your orders as quickly as possible. To be clear, we are filling orders in 4-6 days, and we are shipping immediately after that. Once shipped, our shipping partner, UPS, will get your order out to you as quickly as possible. Thanks for your support and understanding.

Are you in Canada? Specifically, are you outside of a metropolitan centre? We need to alert you to a disruption in shipping due to COVID-19. Our preferred shipping provider, UPS, has informed us that they cannot guarantee express shipping for many locations. We have also seen that packages delivered to Toronto, Ottawa, Vancouver, etc, are not waylaid, but packages delivered to areas just outside of these cities are being held in transit for days or even weeks. UPS has discontinued their guarantee of 1-4 day delivery, which you can read more about here. Therefore, we can guarantee early fulfillment but not early delivery of our goods from our warehouse to your door at this time.

We want you to start your fitness journey with us as quickly as possible, that’s why we send every package to the USA & Canada via expedited or standard shipping (whichever is faster) with our partners at UPS. Once your order has been processed successfully we try to have your shipment prepared within 4-6 business days, and it typically takes 2-4 days to get to you once it leaves our warehouse.

We currently DO NOT SHIP to locations outside of the US and Canada. We DO NOT ship to a P.O. Box number.

We ship all of our physical products with UPS, from our warehouse location in Kingston, Ontario, Canada. Sometimes delivery can be delayed by circumstances out of our control, like postal & custom delays, back-ordered products or incorrectly entered shipping addresses. If there is a delay at Customs, a representative of UPS may contact you to provide your identification in order to receive your package. Please do this ASAP: Customers will be responsible for any additional shipping fees for failure to provide the required information to release a shipment.

Make sure when checking out and paying for your order that all of your information entered is correct! If you notice a mistake in your address, please try to contact us before your order is processed for shipping to avoid any missed shipments or delays. As soon as we process your order for shipping, you will receive a shipping confirmation email that contains your UPS tracking number. You can head on over to the UPS Website to see where your products are. Note: tracking information may take 1-2 business days to be updated in the UPS system

If you are not home when your package is delivered, BodyRock is NOT responsible if it is stolen. Please contact us if this happens to you and we will provide you with all the information needed to take the next steps.
Returns & Exchanges

BodyRock Equipment

We offer a 30-day return policy, as long as: it is not more than 30 days past the date of delivery; and your item is in its original condition and packaging with the original order number. Refunds will be issued when the equipment is received back to the BodyRock warehouse, minus the original cost of shipping, and the customer is responsible for the costs of return shipping. To request a refund on physical product purchases, please contact us.

Digital Products

We cannot issue refunds on digital goods such as e-books or videos, as these are non-tangible goods that are irrevocable once the order is placed.


All of the BodyRock clothing is made to order and so is final sale. If you have any questions about sizing prior to placing your order, please contact us.