from theory to evidence-basedintervention€¦ · RESULTS - TRAININGLOAD Self-reported training...
Transcript of from theory to evidence-basedintervention€¦ · RESULTS - TRAININGLOAD Self-reported training...
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…from theory to evidence-based intervention
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WEIGHT MANAGEMENT INJURY IMMUNE FUNCTION
COGNITIONEXERTION
LEARNING RECOVERY
SLEEP?
RECOVERY
FOCUS & ATTENTION
MOOD
HORMONES
MEMORY & SKILL
LEARNING
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ATHLETE
NON-ATHLETE
Leeder et al. 2012
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RESEARCH AIMS - AGENDA
°C
1 2 3 4
CHARACTERIZE SLEEP ‘SLEEP THIEVES’ SLEEP &PERFORMANCE
OPTIMIZE SLEEP
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1. CHARACTERIZING SLEEP OF ELITE ATHLETES
3 2 1 1 2 3 4 5 6 7
n = 98
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RESULTS |GENERAL SLEEP QUALITY
All
M (SD)
# Athletes
≥ [cutoff]
Demographics
Age 18.72 (3.02)
Female 56
Habitual Sleep
PSQI total (0-21) 4.61 (2.04) 40 [5]
HSDQ total (0-5) 1.64 (0.35) 12 [2.02]
Insomnia 2.11 (0.67) 3 [3.7]
Parasomnia 1.29 (0.37) 2 [2.4]
CRSD 1.81 (0.65) 3 [3.4]
Hypersomnia 1.49 (0.47) 1 [2.9]
RLS/ PLMD 1.63 (0.61) 6 [2.7]
SBD 1.47 (0.41) 1 [2.9]
• Habitual sleep qualitygenerally ok
• But not for all athletes
Knufinke et al (2017) Journal of Sleep Research
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RESULTS | WEEK AVERAGES
M (SD) Healthy
Ranges
Training load (1-10) 5.41 (2.56)
Time in Bed (h:min) 8:33 (1:10)
Total Sleep Time (h:min) 7:51 (1:08) > 7 hrs
Sleep Onset Latency (min) 14 (15) 0-30 min
Wake After Sleep Onset (min) 33 (16) < 30 min
Frequency Awakenings (#) 33 (11) < 30
Sleep Efficiency (%) 88 (5) ~ 92%
REM (%) 27 (7) 20-25%
Light (%) 51 (9) 45-60%
Deep (%) 21 (8) 10-20%
Sleep Quality (1-10) 6.84 (1.48)
Refreshed (1-10) 6.14 (1.70)
Vigor (0-100) 53.81 (18.77)
Affect (0-100) 68.43 (15.64) Knufinke et al. (2017a) JSRKnufinke et al. (2017b) JSMS
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insufficiently
recovered
1. CHARACTERIZING SLEEP OF ELITE ATHLETES
▪ 41% poor sleep quality
▪ 12% potential sleep disorder
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RESEARCH AIMS - AGENDA
°C
1 2 3 4
CHARACTERIZE SLEEP ‘SLEEP THIEVES’ SLEEP &PERFORMANCE
OPTIMIZE SLEEP
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2. IDENTIFYING SLEEP JEOPARDIZING FACTORS
SLEEP HYGIENE
TRAINING LOAD
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“the conditions and practices that promote
continuous and effective sleep”(American Academy of Sleep Medicine, 2001)
SLEEP HYGIENE
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All
M (SD)
# Athletes
≥ [cutoff]
SHI total (13-65) 30.94 (5.21) 0 [ 4]
Regularity 2.59 (0.67) 3 [ 4]
Environment 1.71 (0.79) 1 [ 4]
Psychological
Strain2.75 (0.78) 6
[ 4]
Active Behavior 2.67 (0.60) 0 [ 4]
Naps 1.77 (0.78) 1 [ 4]
Substances 1.91 (1.00) 9 [ 4]
Knufinke et al. (2017a) JSR
RESULTS - SLEEP HYGIENE
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All
M (SD)
# Athletes
≥ [cutoff]
Sleep Hygiene
Heavy Meal (%) 26 (33) 10 [80]
Caffeine After 6 PM (%) 22 (28) 7 [80]
Alcohol After 8 PM (%) 2 (6) 0 [80]
Sleep Medication (%) 3 (1.3) 1 [80]
Bed partner/ Roommate
(%)49 (46) 40 [80]
Bedtime Routine (%) 25 (38) 16 [80]
Nap (%) 18 (20) 1 [80]
Intense Activity (%) 2 (11) 1 [80]
Blue Light (%) 70 (29) 51 [80]Knufinke et al. (2017a) JSR
RESULTS - SLEEP HYGIENE
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Sleep hygiene associated with better sleep quality and fewer sleep complaints
0
0,5
1
1,5
2
2,5
3
13 18 23 28 33 38 43 48Ho
llan
d S
lee
p D
iso
rde
rQ
ue
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aire
(0
-5)
Sleep Hygiene Index (13-65)
0
2
4
6
8
10
12
14
13 18 23 28 33 38 43 48
Pit
tsb
urg
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lee
pQ
ual
ity
Scal
e (
0-2
1)
Sleep Hygiene Index (13-65)
PSQI HSDQ
SHI .45** .50**
RESULTS - SLEEP HYGIENE
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• (Habitual) sleep hygiene matters for
sleep quantity and quality
• Sleep hygiene deserves attention
−Regularity of bed- and rise times
−Psychological strain
−Active pre-sleep behavior
RESULTS - SLEEP HYGIENE
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SLEEP AND EXERCISE: A RECIPROCAL ISSUE?
Regular exercise benefits sleep
→ But, impaired sleep during periods
of intense training
May cause:
• Overreaching
• Performance decrease
• Increase in injuries
• Mood disturbances
Chennaoui et al., (2015).Sleep Medicine
ReviewsFietze et al., (2009). Chronobiology
International Killer et al., (2015). Journal of Sport Science
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SLEEP AND EXERCISE: A RECIPROCAL ISSUE?
How does habitual training load impact
sleep in elite athletes?
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RESULTS - TRAININGLOAD
▪ Self-reported training load did not significantly
affect sleep quantity or sleep stage distributions
(REM, Light, Deep), all p’s > .05
With sleep remaining
irresponsive to changes in
training load, future studies
should investigate whether
the current sleep quantity
and sleep stage distribution
provide sufficient recovery
after strenuous exercise.
Knufinke et al. (2017). J. Sci & Med. in Sport
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RESEARCH AIMS - AGENDA
°C
1 2 3 4
CHARACTERIZE SLEEP ‘SLEEP THIEVES’ SLEEP &PERFORMANCE
OPTIMIZE SLEEP
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3. EFFECTS OF SLEEP ON PERFORMANCE
3 2 1 1 2 3 4 5 6 7
COGNITIVE GROSS MOTORFINE MOTOR
• Reaction Speed
• Error Rate
• Technical skills • Power / endurance
Sport-specific | normalized outcomes converted to arbitrary units
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n M SDSleep Quantity
Total Sleep Time (h:min) 282 7:30 1:05Sleep Onset Latency (min) 282 0:14 0:17Wake After Sleep Onset (min) 282 0:31 0:16Sleep Efficiency (%) 282 88.73 5.55
Sleep StagesDeep (h:min) 206 1:37 0:31REM (h:min) 206 1:59 0:42Light (h:min) 206 3:54 0:50
Note. Episodes of sleep / wakefulness were identified using a high sleep-wake threshold (i.e., AW>80; epochs are scored as wake if activity counts were above 80).
3 2 1 1 2 3 4 5 6 7RESULTS
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Note. The model in Figure 1 refers to response speed. Translated to response time, the model predicts that for each additional hour of sleep, response time is approximately 5ms faster.
Knufinke et al. (2018). JSSM
RESULTS
COGNITIVE: Increase total sleep time – faster reaction time
FINE MOTOR: No significant effects
GROSS MOTOR: Shorter sleep onset latency – better gross motor performance & shortertotal sleep time – beter gross motor performance
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CONCLUSION
Small, naturally occurring changes in sleep quantity and
sleep stages
• are unlikely to result in large
performance effects.
• impact cognitive
performance to a greater extent than athletic
performance.
• highlight a dose-response relationship.
→ more extreme sleep loss or
accumulated sleep debt may
prove to be detrimental for
performance and recovery.
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RESEARCH AIMS - AGENDA
°C
1 2 3 4
CHARACTERIZE SLEEP ‘SLEEP THIEVES’ SLEEP &PERFORMANCE
OPTIMIZE SLEEP
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HOW IS SLEEP REGULATED?
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TARGET MECHANISMSSLEEP
MAINTENANCE
1. SLEEP HYGIENE
2. TEMPERATURE
3. LIGHT
DESIGN CRITERIA
a) theoretically plausible
b) practically usable
SLEEP ONSET
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INTERVENTION PILOTS
1. SLEEP HYGIENE 2. TEMPERATURE 3. LIGHT
19 field hockey players 15 recreational athletes
>> NO SIGNIFICANT EFFECTS >> FASTER SLEEP ONSET
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OPTIMIZING SLEEP IN ATHLETES – LIGHT REGUALTION
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OPTIMIZING SLEEP BY MEANS OF LIGHT
Current situation
Optimal situation
RQ: Can coordinating fixed sleep schedules with light-dark regulation lead to more consolidated sleep in the habitual bedroom environment?
• Delayed melatonin
synthesis
• Increased alertness
• Habitual
melatonin
syntheses
• Increased SOL
• More frequent and
longer WASO
• Reduced sleep duration
• Facilitated sleep onset
• Reduced frequency and
duration of WASO
• Increased sleep duration
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DESIGN - AMBULATORY
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• 26 recreational athletes
• 19-32 years old
• 14 female
• Trained 8.90 ± 4.56 h/week
• Team and individual sports
PARTICIPANTS
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LIGHT REGULATION
faster sleep onset
faster sleep onset
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• Most athletes were in need for a sleep optimization strategy (6.8 ± 2.4)
• Comfort
• Ease of use
• Appearance
PROCESS EVALUATION
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PROCESS EVALUATION
Light symptoms: 38 15 11
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• Carefully timed exposure to bright-light in the morning combined with restriction of short-wavelength light in the evening is effective in shortening self-reported sleep onset latencies and improving sleep quality in athletes, with larger effects in case of a fixed sleep-wake schedule.
• Feasibility of the current intervention is questionable (in a top-sport context) due to:• duration of goggle-use, especially in the
evening• appearance of the goggles• regular sleep-wake pattern
CONCLUSION
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• Explore less obtrusive options of light-regulation that are feasible indoors, outdoors and without attracting much attention in public
FUTURE DIRECTIONS
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CONCLUSION& PRACTICAL IMPLICATIONS
SLEEP HYGIENE
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SLAAPHYGIENE
APP
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SLAAP HYGIENE APP
Kies:• een periode
• start- en end datum
• een locatie
• je sport
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SLAAP HYGIENE APP - MONITORING
Gevalideerde:• slaap hygiëne vragenlijst
• slaap kwaliteit vragenlijst
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SLAAP HYGIENE APP - ADVIES
Advies• persoonlijk feedback
• passend op je slaap behoefde
• passend bij de periode
• makkelijk toepasbaar / praktisch
• op wetenschap gebaseerd
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SLAAP HYGIENE APP – VERGELIJK EN VERBETER
• Slaapadvies en tips• tussen verschillende periodes
• seizoenen
• Verbeter• kijk terug
• leer
• zie je progressie
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SLAAPHYGIENE
APPVRAGEN?
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…from theory to evidence-based intervention