Exercise Types and Sleep: Distinct Effects of Cardio, Strength Training, Yoga, and Stretching
Part 3 of the Exercise & Sleep Series
You’ve likely had this experience: after a 5-kilometer jog one evening, you sleep exceptionally deep that night; or after a long workday with stiff shoulders and neck, you toss and turn unable to fall asleep. The relationship between exercise and sleep is far more nuanced than “being tired makes you sleep well.” Different types of exercise act on the body through entirely different mechanisms, with varying impacts on sleep.
Some people fall asleep much faster after a run, some notice a clear increase in deep sleep after strength training, and others find that only a session of yoga before bed can “turn off the noise” in their minds. Today, we will systematically discuss how four of the most common forms of exercise—aerobic exercise, strength training, yoga, and stretching—each affect your sleep.
1. Aerobic Exercise and Sleep
1.1 What Is Aerobic Exercise?
Aerobic exercise, simply put, is endurance exercise performed with an adequate supply of oxygen. During activity, the body’s energy comes primarily from the aerobic metabolism of fat and glycogen, with heart rate maintained at 60%–80% of maximum heart rate. It can be sustained for extended periods without significant lactic acid buildup.
| Feature | Description |
|---|---|
| Sustainability | Long-duration, moderate-to-low intensity, typically 20 minutes or more |
| Energy system | Relies primarily on aerobic metabolism for fuel |
| Heart rate range | 60%–80% of maximum heart rate |
The most common forms of aerobic exercise in daily life include brisk walking, jogging, swimming, cycling, jump rope, aerobic dance, and rowing. It is also the most thoroughly studied type of exercise for sleep benefits, with the strongest supporting evidence.
1.2 Benefits of Aerobic Exercise for Sleep
In a classic 2000 review by Driver and Taylor at the University of Toronto, which systematically synthesized all available research on exercise and sleep at the time—conclusions still widely cited today—regular aerobic exercise was found to mildly but consistently improve multiple sleep metrics.
| Benefit | Specific Effect |
|---|---|
| Faster sleep onset | Sleep onset latency shortened by an average of ~15 minutes |
| Increased deep sleep | Longer duration of slow-wave sleep (SWS) |
| Longer total sleep time | Overall sleep duration increased |
| Improved sleep efficiency | Higher proportion of time in bed spent actually asleep |
Subsequent meta-analyses have repeatedly confirmed these findings: for healthy adults and people with mild sleep problems, 4–8 weeks of regular aerobic exercise produces measurable improvements in both self-reported sleep quality and objective sleep architecture.
1.3 Why Aerobic Exercise Improves Sleep
Why do activities like running and swimming improve sleep? There are four main scientific explanations, which are not mutually exclusive and work together:
| Mechanism | Explanation |
|---|---|
| Thermoregulatory rhythm effect | Exercise raises core body temperature. After exercise ends, body temperature gradually declines, and this cooling process triggers drowsiness, acting like a natural “sleep signal” |
| Energy depletion hypothesis | After the body’s energy stores are depleted, deep sleep is needed for repair and glycogen replenishment, increasing sleep drive |
| Stress relief effect | Aerobic exercise boosts endorphin secretion, lowers cortisol levels, eases anxiety and mental tension, and reduces “racing thoughts” at bedtime |
| Melatonin regulation | Outdoor exercise with exposure to natural daylight during the day strengthens circadian rhythms, making nighttime melatonin secretion more timely and robust |
Among these, the thermoregulatory rhythm is the most widely accepted mechanism. You can think of it this way: the body first “heats up” and then slowly “cools down”—the larger this temperature difference, the stronger the drive to fall asleep.
1.4 Practical Recommendations
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Duration: 30–60 minutes of moderate intensity per session is sufficient; there is no need to push to extremes.
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Frequency: 3–5 times per week. Consistency matters more than occasional intense sessions.
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Timing: Prioritize morning or afternoon sessions. If you can only exercise in the evening, finish at least 90 minutes before bedtime to allow body temperature and heart rate to return to baseline.
2. Strength Training and Sleep
2.1 What Is Strength Training?
Strength training, also known as resistance training, uses external force (body weight, gym equipment, resistance bands, etc.) to make muscles contract against resistance, stimulating muscle growth and increasing strength. Unlike aerobic exercise, its energy supply relies more on anaerobic metabolism, with individual movements lasting a short time but at high intensity.
| Feature | Description |
|---|---|
| Core principle | Muscles perform work against external force, creating micro-tears that lead to supercompensation during recovery |
| Training goals | Increase muscle mass, boost strength, improve body composition |
| Common forms | Free weights, weight machines, bodyweight training, resistance bands |
Typical strength training exercises include barbell squats, bench press, deadlifts, dumbbell training, push-ups, and pull-ups.
2.2 Effects of Strength Training on Sleep
In the past, there was less research on strength training and sleep, and some people worried that “training too hard would make you too stimulated to sleep.” However, recent research has painted a clear picture: regular strength training also significantly improves sleep quality, and in some dimensions, its effects are comparable to aerobic exercise.
A network meta-analysis covering multiple non-pharmacological interventions found that strength training ranks among the top exercise interventions for improving sleep quality, outperforming light activities like walking alone.
| Effect | Description |
|---|---|
| Sleep quality | Significant reduction in Pittsburgh Sleep Quality Index (PSQI) scores |
| Deep sleep | Increased proportion of slow-wave sleep |
| Sleep continuity | Fewer nighttime awakenings |
Interestingly, some studies have found that strength training may produce a larger increase in melatonin than aerobic exercise, possibly related to signaling from muscle metabolic byproducts.
2.3 Unique Sleep-Promoting Mechanisms of Strength Training
The pathways by which strength training improves sleep overlap with those of aerobic exercise, but it also has unique characteristics:
| Mechanism | Description |
|---|---|
| Growth hormone secretion | Strength training stimulates a large release of growth hormone, whose peak secretion occurs during deep sleep at night, creating a positive feedback loop |
| Increased basal metabolism | More muscle mass raises basal metabolic rate, giving the body a greater need for repair at night |
| Physical fatigue | The “physical tiredness” from muscle training, different from mental fatigue, directly increases the physiological drive for sleep |
| Muscle clock regulation | Skeletal muscle has its own circadian clock. Regular resistance training synchronizes peripheral clocks, which in turn stabilizes the central circadian rhythm |
Put simply: aerobic exercise “gets the whole body moving,” while strength training “breaks down and rebuilds muscle”—the latter creates a more direct demand for deep sleep.
2.4 Practical Recommendations
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Duration: 45–60 minutes per session, including warm-up and rest between sets.
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Frequency: 2–3 times per week, allowing 48 hours of recovery for muscles.
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Timing: Afternoon is the ideal window for strength training, when neuromuscular excitability is high and there is plenty of time before bed. If training in the evening, try to finish at least 3 hours before bedtime to avoid excessive sympathetic nervous system activation.
3. Yoga and Sleep
3.1 What Is Yoga?
Yoga originated in ancient India as a mind-body practice combining physical postures, breath control, and meditation. Compared to the first two types of exercise, yoga does not aim to burn calories or build muscle. Its core is “regulating the autonomic nervous system”—calming the overexcited sympathetic nervous system and allowing the rest-focused parasympathetic nervous system to take over.
| Feature | Description |
|---|---|
| Mind-body integration | Physical postures paired with breath work and focused attention |
| Nervous system regulation | Activates the parasympathetic nervous system and reduces stress responses |
| Improved flexibility | Enhances joint range of motion and muscle tone |
The types of yoga best suited for sleep promotion include Hatha yoga, Yin yoga, Restorative yoga, and Yoga Nidra. Higher-intensity styles like Vinyasa flow or Ashtanga tend to have weaker sleep-promoting effects.
3.2 Benefits of Yoga for Sleep
If aerobic exercise helps you sleep by “tiring out your body,” yoga helps by “calming your mind.” For people with high stress and anxiety-related insomnia, yoga is often more effective than running.
A 2024 systematic review and network meta-analysis of patients with insomnia found that yoga increased total sleep time by approximately 110 minutes, improved sleep efficiency by about 15.6%, and shortened sleep onset time by nearly 30 minutes—remarkable improvements.
| Benefit | Description |
|---|---|
| Reduces mental anxiety | Lowers cortisol and reduces excessive rumination at bedtime |
| Improves breathing patterns | Shifts from chest breathing to diaphragmatic breathing, directly triggering the relaxation response |
| Releases muscle tension | Eases chronic tightness in the shoulders, neck, and lower back, reducing physical discomfort that interferes with falling asleep |
| Especially beneficial for people with insomnia | Research supports its use for chronic insomnia, menopausal sleep disturbances, and sleep problems in older adults |
Research by Streeter’s team at Boston University revealed the neurochemical mechanism behind this: brain gamma-aminobutyric acid (GABA) levels increased by approximately 27% after yoga practice, while no such change was seen in a walking group with similar energy expenditure. GABA is the brain’s primary inhibitory neurotransmitter, acting like a “brake” for the nervous system—higher levels mean greater calm and easier sleep onset.
3.3 Recommended Bedtime Yoga Poses
You don’t need advanced poses before bed; a few gentle ones are enough:
| Pose | Benefit |
|---|---|
| Child’s Pose | Relaxes the back, shoulders, and neck, and eases spinal tension |
| Cat-Cow Stretch | Gently mobilizes the spine and releases back tension |
| Legs-Up-the-Wall (Viparita Karani) | Promotes venous return from the legs, lowers heart rate, and calms the nervous system |
| Corpse Pose (Savasana) | Paired with deep breathing, progressively relaxes the entire body as the perfect transition to sleep |
If you’re short on time, 5–10 minutes of Legs-Up-the-Wall with deep breathing can already produce noticeable relaxation.
3.4 Practical Recommendations
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Duration: 20–45 minutes is ideal; keep practices gentle before bed.
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Frequency: Daily or 3–4 times per week works; consistency is key.
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Timing: Works best within 1 hour before bed. Dim the lights, keep the environment quiet, and treat it as part of your bedtime ritual.
4. Stretching and Sleep
4.1 What Is Stretching?
Stretching uses passive or active methods to lengthen muscle fibers, increase joint range of motion, and relieve muscle tension. It is very low intensity, burns almost no extra energy, and does not significantly raise heart rate—but it is highly effective at relieving physical tension from prolonged sitting.
| Feature | Description |
|---|---|
| Core goal | Lengthen muscle-tendon units and improve flexibility |
| Physiological effect | Reduces muscle tone and relieves local fatigue |
| Common types | Static stretching, dynamic stretching, proprioceptive neuromuscular facilitation (PNF) stretching |
When we talk about stretching for sleep, we are mainly referring to static stretching—holding a stretch position for 30 seconds or more to let muscles gradually relax. Dynamic stretching is better suited for pre-workout warm-ups.
4.2 How Stretching Helps Sleep
Stretching is the most underrated sleep-promoting exercise. It is not intense, doesn’t make you sweat, and doesn’t take much time—but for sleep problems caused by “feeling tight and uncomfortable lying down,” its effects are immediate.
A 2018 study by D’Aurea et al. on people with insomnia found that after 16 weeks of regular stretching training, participants’ insomnia severity decreased by 43.3%, sleep onset latency shortened by 20%, and nighttime wake time decreased by 23.5%. The sleep benefits of stretching are especially pronounced for people with sedentary office jobs and frequent shoulder, neck, or back soreness.
| Benefit | Description |
|---|---|
| Relieves muscle tension | Releases built-up tension in the neck, shoulders, lower back, and hips from a day of desk work |
| Reduces physical pain | Lessens aches and pains that interfere with falling asleep and sleep continuity |
| Calms the nervous system | Paired with slow breathing, gently activates the parasympathetic nervous system |
| Extremely accessible | Requires no equipment, takes little space, and carries almost no risk of injury |
Another hidden benefit of stretching is ritual. When you spend 10 minutes doing the same stretches every night before bed, your body gradually forms a conditioned reflex—after this routine, it’s time to sleep. This kind of bedtime ritual is very helpful for people who have trouble falling asleep.
4.3 Key Areas for Bedtime Stretching
You don’t need to stretch your entire body; focus on the areas that tend to hold the most tension:
| Body Area | Recommended Stretches |
|---|---|
| Neck | Side neck stretches, slow neck rotations, hold for 20 seconds per side |
| Shoulders and upper back | Cross-body shoulder stretches, chest openers, Cat-Cow stretch |
| Lower back and hips | Child’s Pose, seated spinal twist, butterfly stretch |
| Legs | Hamstring stretches, quadriceps stretches, calf stretches |
The key principle of stretching: feel a gentle pull, but no pain. Breathe steadily and don’t hold your breath. Never try to “stretch to the limit”—the goal of bedtime stretching is relaxation, not challenging your flexibility.
4.4 Practical Recommendations
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Duration: 10–20 minutes is enough; even 5 minutes is better than nothing.
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Frequency: Can be done daily, especially after a long day of sitting.
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Timing: Within 30 minutes before bed; works even better with dimmed lights.
5. Side-by-Side Comparison of the Four Exercise Types
With all that covered, how do you choose among these four types of exercise? Here’s a comparison across several dimensions to help you find the right fit.
5.1 Comparison of Sleep-Promoting Effects and Mechanisms
| Exercise Type | Core Sleep-Promoting Mechanism | Most Notable Sleep Benefit | Strength of Evidence |
|---|---|---|---|
| Aerobic exercise | Thermoregulatory rhythm + energy depletion + stress relief | Shortens sleep onset, increases total sleep time | ★★★★★ |
| Strength training | Muscle repair demand + growth hormone + metabolic boost | Increases deep sleep, improves sleep continuity | ★★★★☆ |
| Yoga | Parasympathetic activation + increased GABA + breath regulation | Eases anxiety-related insomnia, improves sleep efficiency | ★★★★☆ |
| Stretching | Muscle relaxation + physical comfort + bedtime ritual | Eases sleep onset difficulties caused by physical tension | ★★★☆☆ |
Note: Evidence strength is based on the volume and consistency of existing research, and does not represent the ranking of actual effects for every individual. Individual variation is large—what works for you is what’s best.
5.2 Comparison of Intensity and Timing Windows
| Exercise Type | Exercise Intensity | Recommended Timing Window | Finish How Long Before Bed |
|---|---|---|---|
| Aerobic exercise | Moderate–high | Morning, afternoon | At least 90 minutes before |
| Strength training | Moderate–high | Afternoon | At least 3 hours before |
| Yoga (gentle styles) | Low–moderate | Evening | 30–60 minutes before |
| Static stretching | Low | Any time | Can be done right before bed |
A common misconception is that “you should never exercise at night.” In reality, only high-intensity vigorous exercise within 1 hour of bedtime may cause sleep difficulties for some people; low-intensity stretching and gentle yoga can actually help sleep when done before bed.
5.3 Comparison of Suitable Populations
| Exercise Type | Best For |
|---|---|
| Aerobic exercise | People who want overall sleep improvement, average fitness, with daytime availability |
| Strength training | People who want to build muscle while improving deep sleep quality |
| Yoga | People with high stress, frequent anxiety, and racing thoughts at bedtime |
| Stretching | Sedentary office workers with muscle tension and soreness that disrupts sleep |
6. How to Choose the Right Exercise for You
There is no one-size-fits-all answer. The core is to match your specific issue, your available time, and your preferences.
6.1 Choose Based on Your Sleep Problem
| Your Concern | Top Recommendation |
|---|---|
| Lying awake for a long time before falling asleep | Daytime aerobic exercise + bedtime yoga / stretching |
| Light sleep, frequent awakenings | Regular strength training + aerobic exercise |
| High stress, racing thoughts at night | Yoga, breathwork, gentle stretching |
| Soreness and discomfort when lying down | Targeted stretching + yoga poses for relaxation |
6.2 Choose Based on Physical Fitness
| Fitness Level | Recommended Exercise |
|---|---|
| Low fitness, rarely exercise | Start with brisk walking, stretching, and gentle yoga |
| Moderate fitness, some baseline activity | Aerobic exercise as the mainstay, paired with yoga |
| Good fitness, regular exercise habit | Combine aerobic + strength training for maximum benefit |
6.3 Choose Based on Available Time
| Time Availability | Recommended Plan |
|---|---|
| Plenty of time, available during the day | Aerobic exercise + 2–3 strength training sessions per week |
| Only available in the evening | Yoga + stretching; avoid high intensity |
| Very fragmented time | 10 minutes of bedtime stretching daily, building up over time |
7. Recommendations for Combined Exercise Routines
Single types of exercise have limitations; combining them yields better results. Sleep is a physiological process influenced by many factors, so addressing it from different angles produces compounding benefits.
7.1 Recommended Classic Combinations
| Combination | Best For | Key Benefit |
|---|---|---|
| Daytime cardio + bedtime stretching | Most people | The most reliable and easiest-to-stick-to pairing |
| Strength training + yoga | Stressed office workers | Builds muscle and regulates mood, balancing body and mind |
| Morning outdoor brisk walk + evening restorative yoga | People with insomnia | Anchors circadian rhythm during the day, calms the mind at night, working on two fronts |
7.2 Sample Weekly Schedule
Here is an exercise plan that balances sleep benefits with real-life practicality, for your reference:
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3–4 days per week: 30–45 minutes of moderate-intensity aerobic exercise (brisk walking, jogging, or cycling, your choice)
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2 days per week: 40 minutes of strength training (split upper-body and lower-body days)
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Every day: 5–15 minutes of bedtime stretching or short yoga session
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1–2 rest days per week: Full rest or only light activity
You don’t need to be perfect. Sticking to 80% of the plan is already excellent.
8. Precautions and Safety Tips
8.1 Sleep-Friendly Habits After Exercise
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Don’t lie down immediately after exercise; allow a buffer period for heart rate and body temperature to return to baseline.
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Hydrate promptly, but avoid drinking large amounts of water within 1 hour of bedtime to prevent nighttime bathroom trips.
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A small amount of protein after strength training is fine, but avoid heavy, greasy meals.
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Avoid scrolling on phones or looking at bright screens after exercise, to let the relaxation effect carry through to bedtime.
8.2 Notes for Special Populations
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People with cardiovascular disease: Always consult a doctor before starting a new exercise program, and begin at low intensity.
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People with joint injuries or degeneration: Prioritize low-impact aerobic exercise like swimming or cycling; avoid running and jumping activities.
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Pregnant people: In the second trimester, prenatal yoga and gentle stretching can be done under professional guidance; avoid supine positions and strenuous exercise.
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People with severe insomnia or sleep apnea: Exercise is an adjunct and cannot replace formal medical evaluation and treatment.
9. Frequently Asked Questions
Q1: Which is better for sleep—cardio or strength training?
There is no absolute “better”; they focus on different aspects.
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Aerobic exercise has stronger evidence for shortening sleep onset time and increasing total sleep duration.
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Strength training has unique advantages for increasing deep sleep proportion and improving sleep continuity.
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For most people, combining the two yields the best results.
Q2: Can yoga “cure” insomnia?
To be precise, yoga is an effective non-pharmacological intervention, not a “cure.” Numerous clinical trials show that regular yoga significantly improves multiple sleep metrics in people with insomnia, with particularly strong effects for insomnia accompanied by anxiety and stress.
However, for severe chronic insomnia, the first-line treatment remains Cognitive Behavioral Therapy for Insomnia (CBT-I), and yoga can serve as an excellent adjunct.
Q3: Does stretching actually improve sleep, or is it just a placebo?
It’s not just a placebo. Stretching directly reduces physical interference with sleep by relieving muscle tension and reducing bodily pain. When paired with slow breathing, it also gently activates the parasympathetic nervous system. Randomized controlled trials have verified that stretching improves insomnia severity and sleep onset latency.
Of course, the psychological cue from the “bedtime ritual” is an added benefit—and that is itself a valid sleep-promoting mechanism.
Q4: Does evening exercise always hurt sleep?
Not necessarily. The key factors are intensity and timing:
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High-intensity interval training or heavy strength training within 1 hour of bedtime can indeed make it harder for some people to fall asleep.
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Gentle yoga, static stretching, or slow walking before bed usually does not disrupt sleep, and may even help with sleep onset.
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For people who are already accustomed to evening workouts, sleep is usually not affected once the body adapts.
The safest approach: finish high-intensity exercise at least 90 minutes before bedtime, to give the body time to cool down and return to baseline.
10. Summary
Remember the Four Exercise Types in One Sentence Each
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Aerobic exercise: Helps you fall asleep faster and sleep longer
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Strength training: Helps you sleep deeper and more soundly
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Yoga: Calms your mind and eases anxiety-related insomnia
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Stretching: Relaxes your body so you fall asleep comfortably
Final Advice for You
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Variety is better than sticking to one type: Don’t do only one kind of exercise. Use cardio as your foundation, strength training to boost results, yoga to calm your mind, and stretching to relax your body.
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Consistency matters more than intensity: 30 minutes of regular exercise 3 times a week is far better than an occasional intense workout.
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What works for you is what works: Everyone says running helps sleep, but if you feel more stimulated after running—switch to yoga. Better sleep is the goal; exercise is just the means.
The relationship between sleep and exercise is essentially a cycle of healthy lifestyle: exercise appropriately, and you’ll sleep better; sleep well, and you’ll have more energy to exercise the next day. Finding your own rhythm matters more than chasing any “best exercise.”
References
[1] American College of Sports Medicine. (2019). ACSM’s Guidelines for Exercise Testing and Prescription (11th ed.). Lippincott Williams & Wilkins.
[2] Driver, H. S., & Taylor, S. R. (2000). Exercise and sleep. Sleep Medicine Reviews, 4(4), 387-402. https://doi.org/10.1053/smrv.2000.0110
[3] Kraemer, W. J., & Ratamess, N. A. (2004). Fundamentals of resistance training: progression and exercise prescription. Sports Medicine, 34(6), 377-388.
[4] Trich, G., et al. (2019). Resistance training and sleep quality: A systematic review and meta-analysis. Journal of Sports Sciences.
[5] Ross, A., & Thomas, S. (2010). The health benefits of yoga and exercise: a systematic review and meta-analysis. PLOS ONE, 5(12), e14920.
[6] Streeter, C. C., et al. (2010). Effects of yoga versus walking on mood, anxiety, and brain GABA levels. Journal of Alternative and Complementary Medicine, 16(11), 1145-1152.
[7] Page, J. (2012). Injury Prevention and Rehabilitation for Fitness Professionals. McGraw-Hill Education.
[8] D’Aurea, C. V., et al. (2018). Effects of stretching training on sleep quality in individuals with insomnia: A randomized controlled trial. European Journal of Applied Physiology, 118(9), 1867-1876.
[9] Stutz, J., et al. (2019). Effects of evening exercise on sleep in healthy participants: A systematic review and meta-analysis. Sports Medicine, 49(2), 269-287.
[10] Li, X., et al. (2024). Effects of various exercise interventions in insomnia patients: a systematic review and network meta-analysis. Journal of Sleep Research. https://doi.org/10.1111/jsr.14234