Muscular Strength and Hydroxyproline Concentration in Urine After Different Flexibility Training Protocols

• Published in: Journal of medical biochemistry Vol. 29; no. 2; pp. 89 - 94
• Main Authors: de Almeida, Olavo, de Oliveira Sampaio, Adriane, Conceição, Mário, Paranhos, Vivian, Mello, Danielli, Vale, Rodrigo, Achour Júnior, Abdallah, Dantas, Estélio
• Format: Journal Article
• Language: English
• Published: Belgrade Versita 01.04.2010; Society of Medical Biochemists of Serbia; Society of Medical Biochemists of Serbia, Belgrade
• Subjects: hidroksiprolin; hydroxyproline; mišićna snaga; muscle strength; muscle stretching exercises; musclestretching exercises; vežbe za istezanje mišića
• ISSN: 1452-8258; 1452-8266
• DOI: 10.2478/v10011-010-0015-x

The objective of this study was to evaluate variation in the lumbar spine extension (LSE) muscular strength index and the hydroxyproline (HP) urinary concentrations as a function of flexibility training with maximum intensity (flexibilizing) statically, by proprioceptive neuromuscular facilitation (PNF) and submaximally. The sample population - with an age of 17.13 ± 1.23; body mass of 63.23 ± 6.36 kg; height of 173.62 ± 5.465 cm and body fat percentage of 10 ± 3.62% - comprised 60 male individuals divided randomly into four equal groups: CG (control), StrG (stretching), SFG (static flexibilizing) and PNFG (flexibilizing by PNF). The statistical program SPSS 14.0 for Windows was used to perform a Shapiro Wilk test to verify the normality of the data and Levene's test to analyze the homogeneity of the sample, repeated measures ANOVA for multiple comparisons among groups and the Tukey's HSD Post Hoc test to determine the statistical difference within groups of the variables. A significance level of 95% (p<0.05) was adopted. The results showed a significant difference in LSE between PNFG and CG (D% = 11%; p = 0.029). It can be concluded that the practice of PNF increased strength in the study group. Cilj studije bio je da se odrede varijacije indeksa mišićne snage ekstenzije lumbalnog dela kičme i koncentracije hidroksiprolina u urinu kao funkcija vežbanja fleksibilnosti sa maksimalnim intenzitetom (fleksibilizacija) statično, proprioceptivnom neuromišićnom facilitacijom (PNF) i submaksimalno. Ispitivanu populaciju - prosečne starosti 17,13±1,23; telesne mase 63,23±6,36 kg; visine 173,62±5,465 cm i sa prosečnim procentom telesne masti 10±3,62 % - činilo je 60 muškaraca nasumično podeljenih u 4 jednake grupe: CG (kontrolnu grupu), StrG (istezanje), SFG (statična fleksibilizacija) i PNFG (fleksibilizacija metodom PNF). Statistički program SPSS 14.0 za »Windows« korišćen je za izvođenje testa Shapiro-Wilk kako bi se utvrdila normalnost podataka i homogenost uzorka. Za ponovljena merenja korišćena je ANOVA sa višestrukim poređenjima između grupa a Tukeyjev HSD post hoc test za utvrđivanje statističke razlike u okviru grupa varijabli. Usvojen je nivo značajnosti od 95 % (p<0,05). Rezultati pokazuju značajnu razliku u ekstenziji lumbalnog dela kičme između PNFG i CG (D%=11%, p=0,029). Može se zaključiti da je upražnjavanje PNF pojačalo snagu u proučavanoj grupi.