Experiences of physical activity during pregnancy in Danish nulliparous women with a physically active life before pregnancy. A qualitative study

[11] Thorp JM(2009)Incidence and outcomes of dystocia in the active phase of labor in term nulliparous women with spontaneous labor onset Acta Obstet Gynecol Scand 88 402-7

[12] Petersen AM(1968)Physiological analysis of middle-aged and old former athletes. Comparison with still active athletes of the same ages Circulation 38 1104-15

[13] Leet TL(2008)Analysing and presenting qualitative data Br Dent J 204 429-32

[14] Brownson RC(1991)A method of analysing interview transcripts in qualitative research Nurse Educ Today 11 461-6

[15] Pereira MA(2004)Qualitative content analysis in nursing research: concepts, procedures and measures to achieve trustworthiness Nurse Educ Today 24 105-12

[16] Rifas-Shiman SL(2003)Activity patterns during pregnancy Can J Appl Physiol 28 642-53

[17] Kleinman KP(2001)Predictors of pregnancy-associated change in physical activity in a rural white population Matern Child Health J 5 7-14

[18] Rich-Edwards JW(1996)Exercise during pregnancy among US women Ann Epidemiol 6 53-9

[19] Peterson KE(2003)Correlates of recreational physical activity in early pregnancy J Matern Fetal Neonatal Med 13 385-93

[20] Gillman MW(1999)Water-gymnastics reduced the intensity of back/low back pain in pregnant women Acta Obstet Gynecol Scand 78 180-5

[11] Thorp JM(2009)Incidence and outcomes of dystocia in the active phase of labor in term nulliparous women with spontaneous labor onset Acta Obstet Gynecol Scand 88 402-7

[12] Petersen AM(1968)Physiological analysis of middle-aged and old former athletes. Comparison with still active athletes of the same ages Circulation 38 1104-15

[13] Leet TL(2008)Analysing and presenting qualitative data Br Dent J 204 429-32

[14] Brownson RC(1991)A method of analysing interview transcripts in qualitative research Nurse Educ Today 11 461-6

[15] Pereira MA(2004)Qualitative content analysis in nursing research: concepts, procedures and measures to achieve trustworthiness Nurse Educ Today 24 105-12

[16] Rifas-Shiman SL(2003)Activity patterns during pregnancy Can J Appl Physiol 28 642-53

[17] Kleinman KP(2001)Predictors of pregnancy-associated change in physical activity in a rural white population Matern Child Health J 5 7-14

[18] Rich-Edwards JW(1996)Exercise during pregnancy among US women Ann Epidemiol 6 53-9

[19] Peterson KE(2003)Correlates of recreational physical activity in early pregnancy J Matern Fetal Neonatal Med 13 385-93

[20] Gillman MW(1999)Water-gymnastics reduced the intensity of back/low back pain in pregnant women Acta Obstet Gynecol Scand 78 180-5