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Why exercise helps you sleep and why sleep is good for your fitness routine

Why exercise helps you sleep and why sleep is good for your fitness routine
I鈥橫 METEOROLOGIST KELLY ANN CICALESE. THANKS. KELLY ANN FIVE ON YOUR HEALTH THIS MORNING. CHOOSING THE BEST WORKOUT FOR YOUR BODY. EXPERTS SAY SOME EXERCISES AREN鈥橳 FOR EVERYONE. HERE TO EXPLAIN IS DOCTOR MIHO TANAKA, DIRECTOR OF THE WOMEN鈥橲 SPORTS MEDICINE PROGRAM AT MASS GENERAL BRIGHAM. DOCTOR, SO NICE TO SEE YOU AGAIN THIS MORNING. WE鈥橵E HEARD THE TERMS HIGH IMPACT AND LOW IMPACT. WHAT鈥橲 THE DIFFERENCE BETWEEN THOSE TWO TYPES OF WORKOUTS? YEAH. SO WHEN WE鈥橰E TALKING ABOUT IMPACT, IT鈥橲 REALLY RELATED TO HOW MUCH STRESS YOU鈥橰E PUTTING THROUGH THE JOINTS. SO ESSENTIALLY HOW HARD YOU鈥橰E HITTING THE GROUND DURING THOSE WORKOUTS. SO A HIGH IMPACT ACTIVITY MIGHT BE SOMETHING LIKE RUNNING JUMPING BOX JUMPS THINGS LIKE THAT. AND IN CONTRAST LOW IMPACT WOULD BE SWIMMING. THAT鈥橲 THE PERFECT LOW IMPACT EXERCISE. WALKING, GETTING ON THE BIKE. THE REASON WHY IT鈥橲 IMPORTANT TO DIFFERENTIATE BETWEEN THESE TWO IS THAT A LOT OF TIMES AS WE GET OLDER, WE HAVE PROBLEMS LIKE KNEE PAIN, ARTHRITIS, THINGS LIKE THAT. AND A LOT OF MY PATIENTS WILL COME IN AND SAY, YOU KNOW, I鈥橵E BEEN TOLD THAT I NEED TO LOSE WEIGHT BECAUSE THAT WILL HELP MY JOINTS. BUT THEN I GO OUT FOR A RUN AND NOW MY KNEES ARE REALLY PAINFUL, SO I CAN鈥橳 LOSE WEIGHT AND MY KNEES STILL HURT. AND THIS IS WHERE WE HAVE TO TALK ABOUT HIGH IMPACT EXERCISES REALLY IMPACTING YOUR JOINTS AND PUTTING A LOT OF PRESSURE ON YOUR JOINTS, ESPECIALLY IF YOU HAVE ANY PROBLEMS WITH THEM AND HOW LOW IMPACT EXERCISES LIKE WALKING, SWIMMING ESPECIALLY CAN BE A GREAT WAY TO GET IN THAT WORKOUT WITHOUT PUTTING THAT ADDED STRESS ON YOUR JOINTS. CAN ANYONE DO LOW IMPACT WORKOUTS? AND WOULD ROWING QUALIFY? I FIND LIKE IF I鈥橫 TOO TIRED TO RUN, THAT鈥橲 A WAY TO GET MOVING. YEAH, SO ROWING IS A GREAT LOW IMPACT EXERCISE. AND THIS IS A REALLY GOOD POINT. SO LOW IMPACT DOESN鈥橳 NECESSARILY MEAN LOW INTENSITY. SO THE INTENSITY OF THE EXERCISE, YOU KNOW, IS HOW MUCH OF A WORKOUT YOU鈥橰E GETTING, HOW MUCH YOU鈥橰E SWEATING, HOW HIGH YOUR HEART RATE IS, AND THOSE TYPES OF THINGS YOU CAN STILL GET FROM A LOW IMPACT EXERCISE WITH SWIMMING, RUNNING, I鈥橫 WALKING OR ROWING. BUT IF YOU鈥橵E BEEN TOLD BY YOUR DOCTOR THAT MAYBE YOU SHOULD LIMIT EXERTION, IF YOU HAVE ANY HEART TROUBLE OR THINGS LIKE THAT, THEN LOW IMPACT EXERCISES MIGHT BE THE WAY TO START. BUT YOU SHOULD STILL CHECK WITH YOUR DOCTOR TO MAKE SURE THAT IT鈥橲 OKAY TO BE PERFORMING THESE EXERCISES. OKAY. WHAT DO YOU TELL YOUR PATIENTS WHO MAY BE IN THE LOW IMPACT CATEGORY ABOUT ADDING A FEW HIGH IMPACT EXERCISES TO THEIR ROUTINE? YEAH, SO HIGH IMPACT EXERCISES HAVE SOME BENEFITS. SO ESPECIALLY BECAUSE IT鈥橲 SO THESE ARE FORCEFUL TYPES OF MOVEMENTS. THEY鈥橰E MORE EFFICIENT. SO YOU鈥橰E GOING TO GET A BETTER WORKOUT FROM THEM. YOU鈥橰E GOING TO STRENGTHEN MORE. YOU CAN EVEN EVEN STRENGTHEN YOUR BONES BECAUSE YOU鈥橰E GETTING THAT SORT OF ADDED PRESSURE ON YOUR JOINTS AND BONES. BUT IF YOU ARE GOING TO ADD THEM IN, OR IF YOU HAVE SOME SORT OF, YOU KNOW, PROBLEMS WITH YOUR KNEES, IT DOESN鈥橳 MEAN YOU CAN NEVER DO A HIGH IMPACT ACTIVITY. IT JUST MEANS THAT YOU HAVE TO EASE INTO IT A LITTLE BIT MORE. BECAUSE IF YOU GET TO A POINT WHERE YOUR MUSCLES ARE NOT ABLE TO SUPPORT YOUR JOINTS, THEN ALL OF THAT PRESSURE GETS ADDED ONTO YOUR JOINTS. AND THIS IS WHERE PEOPLE BECOME PAINFUL. AND SO IF YOU CAN, IF YOU CAN BUILD UP THOSE MUSCLES, AND THOSE ARE THE ONES THAT TAKE THE PRESSURE OFF OF YOUR JOINTS, THEN YOU鈥橠 BE ABLE TO WORK YOUR WAY INTO DOING HIGH IMPACT ACTIVITIES. SO DOING IT SLOWLY AND ALSO ALTERNATING WITH OTHER ACTIVITIES. SO DOING IT JUST A COUPLE TIMES A WEEK IS REALLY THE BEST WAY TO GET STARTED. OKAY, I鈥橫 MOTIVATED TO GO LOW IMPACT ONE DAY, HIGH IMPACT THE NEXT DAY AND JUST KEEP MOVING I THINK IS THE MESSAGE. DO A LITTLE BIT OF SOMETHING WHEN YOU CAN ALL THE TIME. EXACTLY. OKAY. DOCTOR MIHO TANAKA, THANK YOU. DIRECTOR OF WOMEN鈥橲 SPORTS MEDICINE PROGRAM AT MASS GENERAL
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Updated: 11:51 AM CDT Jun 6, 2025
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Why exercise helps you sleep and why sleep is good for your fitness routine
CNN logo
Updated: 11:51 AM CDT Jun 6, 2025
Editorial Standards 鈸�
The health benefits of a good night鈥檚 sleep have long been touted by researchers and medical professionals.While you鈥檙e catching z鈥檚, your body is hard at work maintaining your physical and mental health. It does so by repairing and boosting your cardiovascular and immune systems, plus regulating your metabolism. Your brain also consolidates memories and processes information from the day.Yet while experts recommend getting at least seven hours of sleep per night, nearly 40% of adults reported getting less than this required amount between 2013 and 2022, according to the U.S. Centers for Disease Control and Prevention. That鈥檚 alarming, since sleep deficiency can lead to injuries, physical and mental health problems, less productivity, and an even greater chance of dying, according to the National Institutes of Health.But if you鈥檙e part of that 40%, there鈥檚 hope. A raft of evidence shows regular exercise helps you sleep better, and quality sleep makes it easier and more enjoyable to work out.鈥淭he majority of people report that when they exercise, they sleep better,鈥� said Dr. Eric Olson, president of the American Academy of Sleep Medicine and a professor at the Mayo Clinic Alix School of Medicine in Rochester, Minnesota. 鈥淭hat can mean they fall asleep more easily, enjoy deeper sleep or sleep in bed more efficiently, which means actually sleeping rather than lying awake.鈥滶xercising enhances sleep for a variety of reasons, according to a 2023 systematic review published in the Cureus Journal of Medical Science. Physical activity increases melatonin production, a hormone that regulates your sleep-wake cycles. It reduces stress, which often keeps people tossing and turning at night, plus boosts your mood. Finally, it helps regulate your body temperature, which is key to sleeping well.The review concluded that regular exercise not only improves your sleep quality, but it may even help manage various sleep disorders, such as insomnia.Exercise can definitely help combat insomnia, Olson said, along with sleep apnea. People with sleep apnea experience repeated shallow breathing during sleep, and may even stop breathing at times. (If you think you might have sleep apnea, head to your medical provider right away. It can be dangerous.)鈥淎pnea is often predicated on one鈥檚 weight,鈥� Olson explained. 鈥淪o if exercising helps with weight management, it may also reduce sleep apnea and snoring. Exercising may also help combat restless legs syndrome, another sleep disorder, where you have a compelling urge to move your legs 鈥� although some find exercise exacerbates it.鈥滳ooling down before bed is keyOne key to using exercise to help improve the quality of your sleep is making sure your body temperature has cooled down before heading to bed. This is because a drop in core body temperature signals to your brain that it鈥檚 time to sleep. Exercising in the morning or afternoon is ideal, then, as your body has the bulk of the day to cool down.But if evening workouts are a better fit for your schedule, it鈥檚 fine to exercise then. You just need to give yourself 60 to 90 minutes post-workout for your body temperature to lower before going to bed, said Dr. Sara E. Benjamin, medical director of the Johns Hopkins Center for Sleep and Wellness in Columbia, Maryland.If you don鈥檛 have that much time to spare for an evening cooldown, skip that vigorous run and try a gentle workout instead, such as tai chi or yoga. 鈥淵oga before bed can be relaxing, and sometimes it鈥檚 good to move around before bed so you鈥檙e not as stiff and are more comfortable sleeping,鈥� Benjamin said.When your sleep improves, your workouts should, tooOnce your sleep improves thanks to regular physical activity, you may notice your workouts feel easier and are more enjoyable.鈥淲hen you don鈥檛 get enough quality sleep or a sufficient duration of sleep, your stamina and strength will be reduced, which can impair your workouts,鈥� Olson said. 鈥淎lso, when you鈥檙e overly tired because the quality and duration of your sleep aren鈥檛 adequate, it will be harder to get motivated to work out.鈥漈o further the symbiotic relationship between exercise and sleep, consider exercising outdoors rather than at the gym. 鈥淏eing outside and having natural light exposure is helpful,鈥� Benjamin said.That鈥檚 because exposure to natural light is imperative to the operation of your body鈥檚 circadian rhythm, or internal clock. Your circadian rhythm is a 24-hour cycle that regulates a variety of physiological processes in your body. It鈥檚 primarily influenced by light and darkness, which cue your body that it鈥檚 time to wake up or prepare for bed.Yet the link between good sleep and exercising at times is a personal one. Some people will be able to fall asleep even if they exercise right before bed or ingest caffeine, for example. And younger people may find exercise more beneficial to quality sleep than older adults, who tend to have sleep issues.Still, some form of exercise should help most people improve their sleep. And a good night鈥檚 sleep should make your workouts 鈥� and pretty much everything else in your life 鈥� more enjoyable.

The health benefits of a good night鈥檚 sleep have long been touted by researchers and medical professionals.

While you鈥檙e catching z鈥檚, your body is maintaining your physical and mental health. It does so by repairing and boosting your cardiovascular and immune systems, plus regulating your metabolism. Your brain also consolidates memories and processes information from the day.

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Yet while experts recommend getting at least seven hours of sleep per night, nearly 40% of adults reported getting less than this required amount between 2013 and 2022, according to the U.S. . That鈥檚 alarming, since sleep deficiency can lead to injuries, physical and mental health problems, less productivity, and an even greater chance of dying, according to the .

But if you鈥檙e part of that 40%, there鈥檚 hope. A raft of evidence shows regular exercise helps you sleep better, and quality sleep makes it easier and more enjoyable to work out.

鈥淭he majority of people report that when they exercise, they sleep better,鈥� said Dr. Eric Olson, president of the American Academy of Sleep Medicine and a professor at the Mayo Clinic Alix School of Medicine in Rochester, Minnesota. 鈥淭hat can mean they fall asleep more easily, enjoy deeper sleep or sleep in bed more efficiently, which means actually sleeping rather than lying awake.鈥�

Exercising enhances sleep for a variety of reasons, according to a published in the Cureus Journal of Medical Science. Physical activity increases melatonin production, a hormone that regulates your sleep-wake cycles. It reduces stress, which often keeps people tossing and turning at night, plus boosts your mood. Finally, it helps regulate your body temperature, which is key to sleeping well.

The review concluded that regular exercise not only improves your sleep quality, but it may even help manage various sleep disorders, such as insomnia.

Exercise can definitely help combat insomnia, Olson said, along with sleep apnea. People with sleep apnea experience repeated shallow breathing during sleep, and may even stop breathing at times. (If you think you might have sleep apnea, head to your medical provider right away. It can be dangerous.)

鈥淎pnea is often predicated on one鈥檚 weight,鈥� Olson explained. 鈥淪o if exercising helps with weight management, it may also reduce sleep apnea and snoring. Exercising may also help combat restless legs syndrome, another sleep disorder, where you have a compelling urge to move your legs 鈥� although some find exercise exacerbates it.鈥�

Cooling down before bed is key

One key to using exercise to help improve the quality of your sleep is making sure your body temperature has cooled down before heading to bed. This is because a drop in core body temperature signals to your brain that it鈥檚 time to sleep. Exercising in the morning or afternoon is ideal, then, as your body has the bulk of the day to cool down.

But if evening workouts are a better fit for your schedule, it鈥檚 fine to exercise then. You just need to give yourself 60 to 90 minutes post-workout for your body temperature to lower before going to bed, said Dr. Sara E. Benjamin, medical director of the Johns Hopkins Center for Sleep and Wellness in Columbia, Maryland.

If you don鈥檛 have that much time to spare for an evening cooldown, skip that vigorous run and try a gentle workout instead, such as tai chi or yoga. 鈥淵oga before bed can be relaxing, and sometimes it鈥檚 good to move around before bed so you鈥檙e not as stiff and are more comfortable sleeping,鈥� Benjamin said.

When your sleep improves, your workouts should, too

Once your sleep improves thanks to regular physical activity, you may notice your workouts feel easier and are more enjoyable.

鈥淲hen you don鈥檛 get enough quality sleep or a sufficient duration of sleep, your stamina and strength will be reduced, which can impair your workouts,鈥� Olson said. 鈥淎lso, when you鈥檙e overly tired because the quality and duration of your sleep aren鈥檛 adequate, it will be harder to get motivated to work out.鈥�

To further the symbiotic relationship between exercise and sleep, consider exercising outdoors rather than at the gym. 鈥淏eing outside and having natural light exposure is helpful,鈥� Benjamin said.

That鈥檚 because exposure to natural light is imperative to the operation of your body鈥檚 circadian rhythm, or internal clock. Your circadian rhythm is a 24-hour cycle that regulates a variety of physiological processes in your body. It鈥檚 primarily influenced by light and darkness, which cue your body that it鈥檚 time to wake up or prepare for bed.

Yet the link between good sleep and exercising at times is a personal one. Some people will be able to fall asleep even if they exercise right before bed or ingest caffeine, for example. And younger people may find exercise more beneficial to quality sleep than older adults, who .

Still, some form of exercise should help most people improve their sleep. And a good night鈥檚 sleep should make your workouts 鈥� and pretty much everything else in your life 鈥� more enjoyable.