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Combinatie KT en HIIT een "slecht" plan ....

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wazzup

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Effect of consecutive repeated sprint and resistance exercise bouts on acute adaptive responses in human skeletal muscle
Vernon G. Coffey1, Bozena Jemiolo2, Johann Edge3,4, Andrew P. Garnham5, Scott W. Trappe2, and John A. Hawley1

Abstract

We examined acute molecular responses in skeletal muscle to repeated sprint and resistance exercise bouts. Six men [age, 24.7 * 6.3 yr; body mass, 81.6 * 7.3 kg; peak oxygen uptake, 47 * 9.9 ml·kg−1·min−1; one repetition maximum (1-RM) leg extension 92.2 * 12.5 kg; means * SD] were randomly assigned to trials consisting of either resistance exercise (8 × 5 leg extension, 80% 1-RM) followed by repeated sprints (10 × 6 s, 0.75 N·m torque·kg−1) or vice-versa. Muscle biopsies from vastus lateralis were obtained at rest, 15 min after each exercise bout, and following 3-h recovery to determine early signaling and mRNA responses. There was divergent exercise order-dependent phosphorylation of p70 S6K (S6K). Specifically, initial resistance exercise increased S6K phosphorylation (∼75% P < 0.05), but there was no effect when resistance exercise was undertaken after sprints. Exercise decreased IGF-I mRNA following 3-h recovery (∼50%, P = 0.06) independent of order, while muscle RING finger mRNA was elevated with a moderate exercise order effect (P < 0.01). When resistance exercise was followed by repeated sprints PGC-1α mRNA was increased (REX1-SPR2; P = 0.02) with a modest distinction between exercise orders. Repeated sprints may promote acute interference on resistance exercise responses by attenuating translation initiation signaling and exacerbating ubiquitin ligase expression. Indeed, repeated sprints appear to generate the overriding acute exercise-induced response when undertaking concurrent repeated sprint and resistance exercise. Accordingly, we suggest that sprint-activities are isolated from resistance training and that adequate recovery time is considered within periodized training plans that incorporate these divergent exercise modes.

This study was funded by a grant from the Australian Sports Commission.
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full tekst her: http://ajpregu.physiology.org/content/297/5/R1441.long#abstract-1
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Idd, KT en cardio (hoge intensiteit) op aparte dagen.
 
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  • #4
Ik ben het zeker niet oneens met de stelling sprints en kt voldoende uit elkaar te houden om te rusten, maar...

Ik zie niet hoe dit onderzoek ook echt aantoont dat sprints niet na kt gedaan moeten worden, enkel dat de acute response anders is...

Of weten we zeker dat die vorm van interference ook minder resultaten zal geven op de lange termijn? Kan het niet zijn dat het er juist voor zorgt dat er minder herstel van de kt nodig is of dit makkelijker kan plaatsvinden doordat stress onderbroken wordt?

Je kan zo zonder metingen over langere termijn gedaan te hebben nog geen conclusies trekken over de programmering/periodisatie vind ik, maar ik mis misschien aanvullende kennis - zo weet ik niet precies wat al die moeilijke stoffen doen die beinvloed worden. :)

Weet iemand dit uit te leggen?
 
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Gewoon beetje rustige cardio voelt ook veel beter aan na KT.
 
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