Assessment of Activity in Pregnancy Using an Actigraph
| Status: | Withdrawn |
|---|---|
| Conditions: | Women's Studies |
| Therapuetic Areas: | Reproductive |
| Healthy: | No |
| Age Range: | 18 - 50 |
| Updated: | 11/10/2017 |
| Start Date: | July 2007 |
| End Date: | September 2010 |
We would like to quantify the amount and type of activity a typical pregnant woman engages in
and then compare the pregnancy outcomes of women with varying activity levels. To do this, we
will have women wear a device known as an accelerometer (that records activity by measuring
changes in voltage levels) at certain times in their pregnancies.
and then compare the pregnancy outcomes of women with varying activity levels. To do this, we
will have women wear a device known as an accelerometer (that records activity by measuring
changes in voltage levels) at certain times in their pregnancies.
General findings that have consistently been demonstrated in the literature are that activity
tends to decreased during pregnancy from pre-pregnancy levels and that activity in the third
trimester is less than in the first trimester. In non-pregnant patients, increase in physical
activity and exercise has been associated with improved mood and self-esteem. Although the
data in pregnancy is limited, available studies do suggest that inactivity is associated with
worse mood. Regular physical activity is not detrimental in low-risk patients and in fact may
be beneficial.
Bed rest or activity restrictions are commonly employed interventions for women with a
variety of obstetric complications such as preterm contractions, vaginal bleeding, and fetal
growth restriction. There is no compelling data to support bed rest as an effective
therapeutic modality. There has been some data that occupational work can increase the risk
of preterm birth, but other studies have not demonstrated an effect.5 Furthermore, prolonged
bedrest can have detrimental effects such as muscle weakness and increased thromboembolic
risk, as well as negatively impact familial relations.
The use of the accelerometer is an attempt to objectively quantify physical activity in
pregnancy. The accelerometer assesses activity by measuring voltages, and can thus provide
information on the intensity of activity. An additional advantage is that it can be worn on
the wrist or ankle, whereas pedometers need to be worn on the waist for maximal accuracy
which limits their use in pregnant women. This novel study would contribute to the existing
literature on pregnancy activity that consists primarily of survey/subjective data to
determine what correlation, if any, exists between activity and pregnancy outcome.
Secondarily, the study will survey its participants to see if we can corroborate previous
studies that have demonstrated a relationship between activity level and patients' moods.
tends to decreased during pregnancy from pre-pregnancy levels and that activity in the third
trimester is less than in the first trimester. In non-pregnant patients, increase in physical
activity and exercise has been associated with improved mood and self-esteem. Although the
data in pregnancy is limited, available studies do suggest that inactivity is associated with
worse mood. Regular physical activity is not detrimental in low-risk patients and in fact may
be beneficial.
Bed rest or activity restrictions are commonly employed interventions for women with a
variety of obstetric complications such as preterm contractions, vaginal bleeding, and fetal
growth restriction. There is no compelling data to support bed rest as an effective
therapeutic modality. There has been some data that occupational work can increase the risk
of preterm birth, but other studies have not demonstrated an effect.5 Furthermore, prolonged
bedrest can have detrimental effects such as muscle weakness and increased thromboembolic
risk, as well as negatively impact familial relations.
The use of the accelerometer is an attempt to objectively quantify physical activity in
pregnancy. The accelerometer assesses activity by measuring voltages, and can thus provide
information on the intensity of activity. An additional advantage is that it can be worn on
the wrist or ankle, whereas pedometers need to be worn on the waist for maximal accuracy
which limits their use in pregnant women. This novel study would contribute to the existing
literature on pregnancy activity that consists primarily of survey/subjective data to
determine what correlation, if any, exists between activity and pregnancy outcome.
Secondarily, the study will survey its participants to see if we can corroborate previous
studies that have demonstrated a relationship between activity level and patients' moods.
Inclusion Criteria:
- Nulliparous
- First trimester (11-14w)
- No medical contraindications to normal activity
Exclusion Criteria:
- Chronic medical conditions that require restricted activity (cardiac disease, severe
asthma, etc)
- Known fetal anomalies
- Morbid obesity (BMI > 39)
- Maternal age less than 18 years
- Inability to comply with instructions
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