Home > Riviste > The Journal of Sports Medicine and Physical Fitness > Fascicoli precedenti > The Journal of Sports Medicine and Physical Fitness 2019 February;59(2) > The Journal of Sports Medicine and Physical Fitness 2019 February;59(2):223-9

ULTIMO FASCICOLO
 

JOURNAL TOOLS

eTOC
Per abbonarsi
Sottometti un articolo
Segnala alla tua biblioteca
 

ARTICLE TOOLS

Publication history
Estratti
Permessi
Per citare questo articolo

 

ORIGINAL ARTICLE  EXERCISE PHYSIOLOGY AND BIOMECHANICS 

The Journal of Sports Medicine and Physical Fitness 2019 February;59(2):223-9

DOI: 10.23736/S0022-4707.17.08106-3

Copyright © 2017 EDIZIONI MINERVA MEDICA

lingua: Inglese

Caffeine, acute static stretching and maximum knee flexion strength

Tyler M. FARNEY 1, 2 , Arnold G. NELSON 2, Joke KOKKONEN 3

1 Department of Health and Kinesiology, Texas A&M University - Kingsville, Kingsville, TX, USA; 2 School of Kinesiology, Louisiana State University, Baton Rouge, LA, USA; 3 Department of Exercise and Sport Science, Brigham Young University - Hawaii, Laie, HI, USA



BACKGROUND: Reductions in one-repetition maximum lifts (1RM) following static stretching can be attributed to enhanced neural inhibition, which can be reduced by using stimulants like caffeine. This study compared knee-flexion 1RM following either static stretching (SS) or no-stretching (NS), as well as after ingesting either caffeine (C) or placebo (P).
METHODS: Twenty-four participants (12 female, 12 male) performed four random counterbalanced knee flexion 1RM tests. A 1RM test was performed for each condition at the same time of day with ~48 hours separating each test. Static stretching consisted of 5 exercises with the 1RM being performed immediately following the stretching. Caffeine dose was 6 mg/kg body weight, and the placebo was methylcellulose (520 mg). Both doses were administered as pills 60 minutes before the SS or NS procedures.
RESULTS: Two-way repeated measures ANOVA showed a significant main effect for NS vs. SS (P<0.001, ηG2=0.23). The main effect for C vs. P, and the interaction between C vs. P and NS vs. SS were not statistically different. Average 1RMs were: CNS = 512±242 N, CSS = 474±241 N, PNS = 498±247 N, and PSS = 460±247 N.
CONCLUSIONS: It is concluded that static stretching induced strength decrements are not removed by using stimulants at doses allowed by sport governing organizations.


KEY WORDS: Articular range of motion - Muscle strength - Neural inhibition - Centrale nervous system stimulants

inizio pagina