7
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Ausência de variação da flexibilidade durante o ciclo menstrual em universitárias Translated title: Lack of flexibility variation during menstrual cycle in university students

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          FUNDAMENTAÇÃO: Algumas variáveis da aptidão física são marcadamente influenciadas pelas fases do ciclo menstrual (CM); contudo, há pouca informação sobre eventuais modificações na flexibilidade. OBJETIVO: Analisar o comportamento da flexibilidade corporal - global, por articulação e por movimento - em mulheres adultas jovens nas diferentes fases do CM. MÉTODOS: Estudou-se uma amostra de 15 mulheres. O grupo experimental (GE) foi constituído de alunas eumenorréicas, enquanto o grupo controle (GC) incluía alunas em uso regular havia pelo menos um mês de anticoncepcional oral (AO). Dados referentes ao período menstrual e ao uso de AO foram obtidos através da aplicação de um questionário. A flexibilidade foi avaliada pelo Flexiteste, permitindo uma análise da flexibilidade global (Flexíndice), por articulação, por movimento e em sua variabilidade. Os Flexíndices foram ainda comparados com os correspondentes percentis para gênero e idade. Para a análise estatística das três medidas do GE - fases folicular, ovulatória e lútea - e das duas do GC entre dias cinco e 26 do ciclo, utilizou-se ANOVA ou teste t conforme apropriado. RESULTADOS: Não houve diferenças na flexibilidade, movimento a movimento ou Flexíndice nas diferentes fases do CM no GE e nas duas medidas do GC (p > 0,05). O percentil do Flexíndice para o GC variou de 14 a 35 e no GE, de 14 a 80. Analisando as articulações e os índices de variabilidade, não foram encontradas diferenças significativas com as fases do CM (p > 0,05), com a exceção do índice de variabilidade distal-proximal entre as fases ovulatória e folicular no GE. CONCLUSÃO: Os dados obtidos não corroboram a impressão empírica de que a flexibilidade varia durante as fases do CM. Não se pode, contudo, afastar a hipótese de que a ausência de variações tenha ocorrido devido a alguma característica da amostra ou por limitações do Flexiteste em identificar mínimas variações, sendo necessária a realização de outros estudos.

          Translated abstract

          BACKGROUND: Some physical components are markedly influenced by the different phases of menstrual cycle (MC); however, there is little information about changes in flexibility. OBJECTIVES: To analyze the behavior of corporal flexibility - global, per joints and per movements - in adult young women during different phases of the MC. METHODS: A sample of 15 women was studied. The experimental group (EG) included students with regular MC, and the control group (CG) had students that had been taking oral contraceptives (OC) for at least one month. Data concerning the MC and OC use were acquired by questionnaire. The flexibility was evaluated by Flexitest, allowing a global analysis of flexibility (Flexindex), per joints, per movements and its variability. The Flexindices were compared with corresponding percentiles as to gender and age. For the statistical analysis in three phases of the EG - follicular, ovulatory and luteal - and the CG in two different moments - between the days 5 and 26 of the MC, ANOVA and T-test were used as appropriate. RESULTS: There were no significant differences in flexibility, per movements or Flexindex during the phases of MC in the EG or in the CG (p > 0.05). The Flexindex percentiles ranged from 14 to 35 for the CG, and from 14 to 80 for the EG. No significant differences between the joints and the variability indices during the MC were observed (p > 0.05), except for the distal-proximal variability indices between the follicular and ovulatory phases on the EG. CONCLUSION: These data do not corroborate the empirical impression that flexibility changes during MC phases. However, it is possible that the lack of variation could have occurred due to some sample characteristics or to Flexitest limitations in identifying small changes, which poses the need for other studies.

          Related collections

          Most cited references16

          • Record: found
          • Abstract: found
          • Article: not found

          Changes in muscle strength, relaxation rate and fatiguability during the human menstrual cycle.

          1. The effect of the different phases of the menstrual cycle on skeletal muscle strength, contractile properties and fatiguability was investigated in ten young, healthy females. Results were compared with a similar group on the combined (non-phasic) oral contraceptive pill (OC). Cycle phases were divided into the early and mid-follicular, mid-cycle (ovulatory) and mid- and late luteal. Cycle phases were estimated from the first day of the menstrual bleed. 2. Subjects were studied weekly through two complete cycles. Measurements included quadriceps and handgrip maximum voluntary isometric force and the relaxation times, force-frequency relationship and fatigue index of the quadriceps during percutaneous stimulation at a range of frequencies from 1 to 100 Hz. 3. In the women not taking the OC there was a significant increase of about 11% in quadriceps and handgrip strength at mid-cycle compared with both the follicular and luteal phases. Accompanying the increases in strength there was a significant slowing of relaxation and increase in fatiguability at mid-cycle. No changes in any parameter were found in the women taking the OC. 4. The changes in muscle function at mid-cycle may be due to the increase in oestrogen that occurs prior to ovulation.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            The influence of menstrual cycle phase on skeletal muscle contractile characteristics in humans.

            The influence of the different phases of the menstrual cycle on skeletal muscle contractile characteristics was studied in 19 regularly menstruating women. Muscle function was measured when (i) oestrogen and progesterone concentrations were low (menstruation), (ii) oestrogen was elevated and progesterone was low (late follicular phase), and (iii) oestrogen and progesterone were both elevated (luteal phase).Maximal isometric quadriceps strength, fatiguability and electrically stimulated contractile properties were measured. Isokinetic knee flexion and extension strength and fatiguability were also assessed as well as handgrip strength. Menstrual cycle phases were confirmed through measurement of oestrogen, progesterone, follicle stimulating hormone and luteinising hormone. No significant changes were found in any of the muscle function parameters throughout the menstrual cycle (n = 15). The muscle function measurements showed no significant correlations with any of the female reproductive hormone concentrations. These results suggest that the fluctuations in female reproductive hormone concentrations throughout the menstrual cycle do not affect muscle contractile characteristics.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              The timing of the "fertile window" in the menstrual cycle: day specific estimates from a prospective study.

              To provide specific estimates of the likely occurrence of the six fertile days (the "fertile window") during the menstrual cycle. Prospective cohort study. 221 healthy women who were planning a pregnancy. The timing of ovulation in 696 menstrual cycles, estimated using urinary metabolites of oestrogen and progesterone. The fertile window occurred during a broad range of days in the menstrual cycle. On every day between days 6 and 21, women had at minimum a 10% probability of being in their fertile window. Women cannot predict a sporadic late ovulation; 4-6% of women whose cycles had not yet resumed were potentially fertile in the fifth week of their cycle. In only about 30% of women is the fertile window entirely within the days of the menstrual cycle identified by clinical guidelines-that is, between days 10 and 17. Most women reach their fertile window earlier and others much later. Women should be advised that the timing of their fertile window can be highly unpredictable, even if their cycles are usually regular.
                Bookmark

                Author and article information

                Journal
                rbme
                Revista Brasileira de Medicina do Esporte
                Rev Bras Med Esporte
                Sociedade Brasileira de Medicina do Exercício e do Esporte (São Paulo, SP, Brazil )
                1517-8692
                1806-9940
                December 2002
                : 8
                : 6
                : 212-218
                Affiliations
                [02] orgnameClínica de Medicina do Exercício
                [01] orgnameUniversidade Gama Filho orgdiv1Programa de Pós-Graduação em Educação Física
                Article
                S1517-86922002000600002 S1517-8692(02)00800602
                264cd900-5540-4a3f-a691-0a7aef3dc386

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 23 May 2002
                : 14 September 2002
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 17, Pages: 7
                Product

                SciELO Brazil

                Self URI: Texto completo somente em PDF (PT)
                Categories
                Artigos Originais

                Menstrual cycle,Ciclo menstrual,Oral contraceptive,Flexibility,Flexibilidade,Anovulatório oral

                Comments

                Comment on this article