NCT04076618

Incorporating Nutrition, Vests, Education, and Strength Training in Bone Health (INVEST in Bone Health)

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 150 (actual)
• Sponsor: Wake Forest University Health Sciences · Academic / Other
• Sex: All
• Age: 60 Years – 85 Years
• Healthy volunteers: Not accepted

Summary

The main goal of the proposed study is to compare the effects of weight loss (WL) alone with WL plus weighted vest use or WL plus resistance exercise training (RT) on indicators of bone health and subsequent fracture risk.

Detailed description

The study team proposes that a 12 month trial in 150 older (60-85 years) adults with obesity (Body mass index or BMI=30-40 kg/m2 OR 27.0-\<30 kg/m² and one obesity-related risk factor) randomized to one of three interventions (n=50/group): WL alone (WL; caloric restriction targeting 10% WL); WL plus weighted vest use (WL+Vest); targeting ≥8 hours/day, weight replacement titrated up to 10% WL); or, WL plus structured RT (WL+RT; 3 days/week). Total hip trabecular volumetric bone mineral density (vBMD) is the primary outcome. This outcome will be complemented by exploratory assessment of several fracture-related risk factors, including: (1) femoral neck and lumbar spine vBMD, cortical thickness, finite element modeling of bone strength, and regional fat and muscle volumes, measured by CT; (2) areal bone mineral density (aBMD) at the total hip, femoral neck, lumbar spine, and distal radius; trabecular bone score; and total body fat/lean masses, measured by dual energy x-ray absorptiometry (DXA); (3) muscle function and strength; (4) biomarkers of bone turnover; and (5) bone-regulating hormones/cytokines known to influence bone metabolism during WL. Therefore, the investigators Specific Aims are to: Aim 1: Determine the effects of WL+Vest compared to WL and WL+RT on 12 month change in total hip trabecular vBMD. Despite similar reductions in total body weight, Hypothesis 1: Participants in the WL+Vest group will show attenuated losses of total hip trabecular vBMD versus WL; and Hypothesis 2: Loss in total hip trabecular vBMD will be no greater in WL+Vest compared to WL+RT. Aim 2: Explore the effects of WL+Vest compared to WL and WL+RT on the 12 month change in fracture-related risk factors. Despite similar reductions in total body weight, we hypothesize that WL+Vest and WL+RT will demonstrate improvements in fracture-related risk factors compared to WL.

Conditions

• Weight Loss
• Bone Health

Interventions

Type	Name	Description
DEVICE	Vest	Weighted Vest worn \> or = 8 hours per day
BEHAVIORAL	Resistance Exercise Training	Structured exercise training 3 days a week
BEHAVIORAL	weight loss program	a 24-week intensive phase (with weekly dietary classes) followed by a 27-week transition phase (with biweekly dietary classes)

Timeline

• Start date: 2020-08-12
• Primary completion: 2024-04-01
• Completion: 2024-04-01
• First posted: 2019-09-03
• Last updated: 2025-02-06
• Results posted: 2025-02-06

Locations

1 site across 1 country: United States

Regulatory

• FDA-regulated device study