HIT improves health meta-analysis |
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40 active males, LSD(70%), LT(80%), 15/15 (95%/70%), 4x4/3(95%/70%), similar o2 consumption, AIT significantly increased stroke volume & VO2max compared to CET |
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Both CET & HIT improve CV fitness |
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Intensity crucial for optimal results |
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CV fitness is a marker of mortality |
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7 sedentary participants, LV-HIT (3x/wk) 2wks, 35% increase muscle oxidative capacity & 35% increase in insulin sensitivity, low subject numbers, similar for T2D (Little et al, 2011) |
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14 sedentary overweight/obese participants, 3x20s (3x/wk) 6wks, 12% increase in VO2peak, 40% increase in CS post-training, decrease in FPI post-training |
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16 active participants, SIT (3x/wk) 2wk, TTE (80% VO2max), increase CS, 100% improvement TTE (51 vs 26min), control = no training, support for TT (Burgomaster et al, 2006) |
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supports Rodas et al (2000) |
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SIT vs CET, 20 active participants, 3x/wk 6wks, both improve VO2peak, PPO, markers of mitochondrial biogenesis, SIT = 90% less training volume (10min vs. 4.5hrs) |
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16 healthy, sedentary, active participants, Burgomaster et al (2005) protocol, OGTT responses, Insulin sensitivity improves 23%, efficacy in overweight/obese/T2D? Overly intense? |
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29 sedentary participants, RE-HIT (3x/wk) 6wks, insulin sensitivity increases 28% |
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SIT (3x/wk) 2wk, 5 participants, increased enzymatic activity of energetic pathways (CS, HADH), 11% VO2max increase, no control |
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HIT alternative to CET |
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27 heat failure patients, 75 y/o, AIT vs. MICE vs. CON (PA advice), 3x/wk 12wks, AIT increased VO2peak, anaerobic threshold, cardiac function, similar for hypertension (Molmen-Hansen et al, 2011) |
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glycogenolysis negligible after 15-20s, exhausted on 3rd bout |
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Supports Babraj et al (2009) |
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30s sprints, 6min recovery of power output in parallel with PCr resynthesis |
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HiT improves VO2max more than CET meta-analysis |
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active recovery shortens recovery time of power output to ~4mins |
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8 active women, 7 AIT/2wks, increase whole body and skeletal muscle fat oxidation capacity, no control, increased FABP (Talanian et al, 2010) |
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HIGH vs LOW intensity, 19 overweight/obese men, LV-HIT (3x/wk) 3wks, LO(70%) vs. HI(100%), both increase CS and COX-IV, VO2peak/submaximal performance increased more in HI |
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