When you’re finally in a good workout groove, a rest day can feel like wasted time.
But while you’re taking it easy, your body isn’t.
That time between workouts is when your muscles repair, your energy stores refill and your body adapts to the work you’ve been putting in.
“Exercise creates stress on the body, and that stress can be healthy,” says Mitchell Lyons, MS, CSCS, a strength and conditioning specialist with Hartford HealthCare. “But your muscles, joints and nervous system also need time to recover so you can keep making progress safely.”
So what actually happens to your body on a rest day, and how much recovery do you really need?
Here’s what to know.
Rest days help your body rebuild
A good workout challenges your muscles.
That challenge helps you build strength and endurance over time. But much of that progress happens after the workout is over, while your body repairs and adapts.
“When you exercise, especially during strength training or higher-intensity workouts, your muscles experience small amounts of stress,” Lyons says. “Recovery gives your body time to repair and adapt.”
That doesn’t mean you need to spend every rest day on the couch, but it does mean your body needs a break from pushing hard all the time.
Some people even notice that they can lift more after a short break. In fact, ,many strength programs include planned “deload” periods when the weight, intensity or number of sets is reduced.
“A deload gives the body time to recover before training intensity increases again,” Lyons says. “Taking that step back can sometimes help you perform better when you return to harder workouts.”
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Rest helps your body keep up with your workouts
Rest days can be surprisingly hard to take, especially if you’re working towards a goal like weight loss or using it to de-stress.
But skipping rest doesn’t always mean better results.
“More exercise is not always better,” Lyons says. “Consistency matters, but so does recovery. If you never give your body time to rest, you may increase your risk of injury or burnout.”
Your body needs both effort and recovery to keep improving.
“The best workout plan is one you can stick with,” Lyons says. “If taking a rest day helps you stay consistent or perform better when you return, that rest is extremely valuable.”
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Active recovery counts, too
Just because its a rest day, doesn’t mean you should do nothing. For most people, active recovery is the best option.
Gentle movements like a walk or some light stretching or mobility work can help your body feel better without adding more strain. Activities like biking, swimming or golfing are other great alternatives.
But make sure you don’t overexert yourself.
“If you finish your rest day feeling more drained than when you started, it probably wasn’t really a rest day,” Lyons says.
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Harder workouts require more recovery
How much rest your body needs depends on the intensity of your workouts. If your exercise routine consists of walking, you may not need a lot of full rest days, while someone who’s lifting heaving or training for a race may need more.
“Higher-intensity exercise usually requires more recovery,” Lyons says. “The harder you train, the more intentional you need to be about rest.”
A balanced routine should include harder training days mixed with easier movement and time for mobility or stretching. Some weeks might also require a full recovery day to keep your body and training on track.
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Your body will usually tell you when it needs a break
Some soreness after a workout is normal, but when you notice that your routine is harder or you’re feeling run down, it could be time to scale things back.
“Pain is different from normal muscle soreness,” Lyons says. “If something feels sharp, lasts longer than expected or changes the way you move, it’s worth taking a step back.”
If your pain keeps returning or is paired with swelling or weakness, it’s also worth checking in with a healthcare professional.
