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| Name | Class |
|---|---|
| University of the Basque Country (UPV/EHU) | OTHER |
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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.
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.
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| Measure | Description | Time Frame |
|---|---|---|
| Time spent in moderate-to-vigorous physical activities | The time spent in moderate-to-vigorous physical activities during a week (The participants have to wear an accelerometer attatched at the hip on an elastic belt for a period of 7 days) | 1 week |
| Measure | Description | Time Frame |
|---|---|---|
| accelerometer intensity cut-points | accelerometer activity counts corresponding to each woman´s lactate thresholds will determine each intensity level (These thresholds are determined on the walking-running tests performed on different days with a minimum of one week in between. These tests are independent, they are performed at constant speed during 20min to determine the highest speed at which the lactate concentration remains in a steady state between the minute 10 and 20 of the test) |
| Measure | Description | Time Frame |
|---|---|---|
| Maximum Strength | hand grip, leg and bench press maximum lifted weight (kg) | 1 day |
| Heart rate variability | the heart rate variability response during the walking-running tests and during the weekly physical activity assessment |
Inclusion Criteria:
Exclusion Criteria:
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Postmenopausal women
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| Name | Affiliation | Role |
|---|---|---|
| Esteban Gorostiaga, Medicine | Centro de Estudios, Investigación y Medicina del Deporte | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Centro de Estudios, Investigación y Medicina del Deporte | Pamplona | Navarre | 31005 | Spain |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 16404492 | Background | Vainionpaa A, Korpelainen R, Vihriala E, Rinta-Paavola A, Leppaluoto J, Jamsa T. Intensity of exercise is associated with bone density change in premenopausal women. Osteoporos Int. 2006;17(3):455-63. doi: 10.1007/s00198-005-0005-x. Epub 2006 Jan 11. | |
| 16823548 | Background | Martyn-St James M, Carroll S. High-intensity resistance training and postmenopausal bone loss: a meta-analysis. Osteoporos Int. 2006;17(8):1225-40. doi: 10.1007/s00198-006-0083-4. Epub 2006 Jun 1. |
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Codified IPD (personal data not shown, e.g. 321RR) will be shared with the Musculoskeletal Research Unit of the University of Bristol for the deep analysis of the 3th outcome
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| an average of 1 month |
| Number of vertical acceleration peaks during the day | raw acceleration data will be measured to describe daily exposure to potentially osteogenic vertical impacts (The participants have to wear an accelerometer attatched at the hip on an elastic belt for a period of 7 days) | 1 week |
| aerobic fitness | determination of the speeds corresponding to the lactate thresolds during the walking-running test | an average of 1 month |
| an average of 1 month |
| 17686670 | Background | Borer KT, Fogleman K, Gross M, La New JM, Dengel D. Walking intensity for postmenopausal bone mineral preservation and accrual. Bone. 2007 Oct;41(4):713-21. doi: 10.1016/j.bone.2007.06.009. Epub 2007 Jun 26. |
| 9588623 | Background | Freedson PS, Melanson E, Sirard J. Calibration of the Computer Science and Applications, Inc. accelerometer. Med Sci Sports Exerc. 1998 May;30(5):777-81. doi: 10.1097/00005768-199805000-00021. |
| 23547769 | Background | Ozemek C, Cochran HL, Strath SJ, Byun W, Kaminsky LA. Estimating relative intensity using individualized accelerometer cutpoints: the importance of fitness level. BMC Med Res Methodol. 2013 Apr 1;13:53. doi: 10.1186/1471-2288-13-53. |
| 21616714 | Background | Sasaki JE, John D, Freedson PS. Validation and comparison of ActiGraph activity monitors. J Sci Med Sport. 2011 Sep;14(5):411-6. doi: 10.1016/j.jsams.2011.04.003. Epub 2011 May 25. |
| 1494764 | Background | Singh SJ, Morgan MD, Scott S, Walters D, Hardman AE. Development of a shuttle walking test of disability in patients with chronic airways obstruction. Thorax. 1992 Dec;47(12):1019-24. doi: 10.1136/thx.47.12.1019. |
| 20440028 | Background | Miller NE, Strath SJ, Swartz AM, Cashin SE. Estimating absolute and relative physical activity intensity across age via accelerometry in adults. J Aging Phys Act. 2010 Apr;18(2):158-70. doi: 10.1123/japa.18.2.158. |
| 19998859 | Background | Lopes VP, Magalhaes P, Bragada J, Vasques C. Actigraph calibration in obese/overweight and type 2 diabetes mellitus middle-aged to old adult patients. J Phys Act Health. 2009;6 Suppl 1:S133-40. doi: 10.1123/jpah.6.s1.s133. |
| 27798733 | Background | Hannam K, Deere KC, Hartley A, Clark EM, Coulson J, Ireland A, Moss C, Edwards MH, Dennison E, Gaysin T, Cooper R, Wong A, McPhee JS, Cooper C, Kuh D, Tobias JH. A novel accelerometer-based method to describe day-to-day exposure to potentially osteogenic vertical impacts in older adults: findings from a multi-cohort study. Osteoporos Int. 2017 Mar;28(3):1001-1011. doi: 10.1007/s00198-016-3810-5. Epub 2016 Oct 31. |
| 12627312 | Background | Beneke R. Methodological aspects of maximal lactate steady state-implications for performance testing. Eur J Appl Physiol. 2003 Mar;89(1):95-9. doi: 10.1007/s00421-002-0783-1. Epub 2003 Jan 21. |