NCT02984553

Objective Physical Activity Assesment in Postmenopausal Women

The Use of Lactate Thresholds to Individualize Accelerometer Cut-points and Objectively Assess Physical Activity Levels in Postmenopausal Women

• Status: Unknown
• Phase: —
• Study type: Observational
• Enrollment: 80 (actual)
• Sponsor: Centro de Estudios, Investigación y Medicina del Deporte · Other Government
• Sex: Female
• Age: 50 Years – 70 Years
• Healthy volunteers: Accepted

Summary

The purpose of this study is to accurately assess weekly physical activity levels of postmenopausal women using lactate thresholds to individualize the accelerometer cut-points.

Detailed description

This observational study aims to accurately assess weekly physical activity levels of postmenopausal women using lactate thresholds to individualize the accelerometer cut-points. Postmenopausal women will be recruited from local advertisements in public health centers. Each woman will perfom on different days a progressive discontinuous submaximal walking-running test and several constant speed tests wearing an accelerometer to identify the individual lactate threshold (LT), the maximal lactate steady state (MLSS) and the corresponding accelerometer activity counts/min (cpm). Participants then will wear an actigraph accelerometer (wGT3X-BT) for seven days. Linear regression equations will be developed for each participant to determine accelerometer activity counts for each intensity level: 1) sedentary behaviour (\<200 cpm), 2) light intensity (200 cpm to activity counts at LT), 3) moderate intensity (activity counts between LT and MLSS) and 4) vigorous intensity (activity counts \>MLSS). Physical activity levels will be measured using both, individualized approach and Sasaki, Jonh and Freedson´s (2011) absolute cut-points obtained through walking and running activities eliciting 3-6 MET intensities (2689-6166 cpm), considering it a "moderate" effort.

Conditions

• Primary Prevention

Timeline

• Start date: 2015-11-01
• Primary completion: 2017-07-01
• Completion: 2017-07-01
• First posted: 2016-12-07
• Last updated: 2016-12-07

Locations

1 site across 1 country: Spain