comparison of two different sprint interval work to rest ratios on acute metabolic and inflammatory...
Post on 14-Dec-2015
216 Views
Preview:
TRANSCRIPT
Comparison of Two Different Sprint Comparison of Two Different Sprint Interval Work to Rest Ratios on Acute Interval Work to Rest Ratios on Acute
Metabolic and Inflammatory Metabolic and Inflammatory ResponsesResponses
Harnish CR, RT Sabo, DM Morries, EO Acevedo
This research was made possible through the support of Award Number UL1RR031990 from the National Center for Research Resources
IL-6
IL-6
AMPK↓Glycogen
↑[Cai2+]
Motor UnitRecruitment
IL-10
↑Glucose Uptake
↑Lypolysis AMPK Insulin
Cell
InactiveGLUT-4
IL-6
IL-6
IL-6
IL-6
IL-6
↑↑SSii
oror
GlucoseGlucoseUptakeUptake
TNF-α
Stimulation
Inhibition
Translocation
FunctionalGLUT-4
Adapted from Febbraio and Pedersen 2002; Pedersen and Fischer 2007
Initiation of muscle-derived IL-6 release and the subsequent cascade effect
From Cytokines to Myokines
RECOVERY
Sprint Interval TrainingSprint Interval Training
2 weeks SIT enhanced Si and metabolic functionBabraj, 2009; Gibala 2011; Little 2012
6 weeks 30 sec Wingate sprints elicited similar adaptations to endurance
Weekly volume 225 vs 2250 kJ/wkIncreased enzymes and mitochondria
Burgomaster, 2008; Gibala, 2006, 2008, 2009
Inconclusive single session data on Si or CytokinesBrestoff et al.2010 showed no acute impact of 5 sprints, raising questions about mechanism for chronic improvementWork to rest ratio believed to impact
exercise-stress responseNote: Only 8 of 12 subjects could be analyzed for cytokine response.
Is there a relationship between inflammation and Si?
Will shorter rests influence either inflammation or Si?
QuestionsQuestions
MethodsMethods13 Men & 2 women
23.8 (0.9) yrs, 78.5 (1.6) kg, 1.8 (0.27) m16.9 (1.7) % fat237 (14.6) 2 min Max Watts
Testing completed over 3 – 4 wk; 0700-1100 hrs12 hr fast
Each subject completed both sprint sessionsTabata: 10X 20 sec sprint with 10 sec recovery – 5%
Wingate: 5X 30 sec sprint with 4 min rest – 7%
Study Design
PREBLOOD
PREBLOOD
POST BLOODPOST
BLOOD1 hr POST
BLOOD1 hr POST
BLOOD24 hr POST
BLOOD24 hr POST
BLOOD
RESULTSRESULTS
TABATA WINGATE% Max Power 95.6 (4.7) 196.8 (4.7)
kJ 64.7 (3.5) 68.0 (3.5)
BLC (mM) 12.8 (0.7) 12.6 (0.7)
Total Time 04:50 18:30
IL-10 (pg/ml)Post
1 hr Post
341.5 (37.7)534.5 (37.7)322.2 (37.7)
341.5 (37.7)528.7 (37.7)371.7 (37.7)
TNF-α (pg/ml)Post
1 hr Post
625.6 (76.5)947.4 (76.5)507.6 (76.5)
625.6 (76.5)946.6 (76.5)551.5 (76.5)
Significant p < 0.05; 2X4 ANOVA Significant p < 0.05; 2X4 ANOVA
Inflammatory response to Tabata and Wingate
**
Insulin Sensitivity before and after SIT
RESULTSRESULTS
PREPREPREPRE TABATATABATATABATATABATA WINGATEWINGATEWINGATEWINGATE
Cederholm Index for peripheral insulin sensitivity, 1990
p < 0.03
p < 0.67
Mg
*I2*m
M-1*m
U-1*m
in-1
ConclusionsConclusions
Single SIT session does not improve Insulin Sensitivity 24 hrs post exercise
SIT Pro-inflammatory?Increased IL-10 ineffective at improving Si
W:R does not affect SIT inflammatory responseData indicate IL-10 and TNF myokines
Future Work: When does Si begin to improve after SIT? Between 1 day & 14 days?
Special ThanksSpecial Thanks
Shirley HelmShirley Helm
VCU CCTR and CRSU StaffVCU CCTR and CRSU Staff
Experiment.comExperiment.com
Dept of Health & Human PerformanceDept of Health & Human Performance
IL-1
0
Pearson Correlation: TNF-α vs IL-10
TNF-α
R= 0.79R= 0.79
RESULTSRESULTS
p < 0.0001p < 0.0001
top related