Can sit-to-stand muscle power explain the ability to perform functional tasks in adults with severe obesity?. Issue 11 (3rd June 2019)

• Record Type: Journal Article
• Authors: Orange, Samuel T.; Marshall, Phil; Madden, Leigh A.; Vince, Rebecca V.
• Is Part Of: Journal of sports sciences. Volume 37:Issue 11(2019)
• Page Start: 1227
• Page End: 1234
• Publication Date: 2019-06-03
• Subjects: Power -- strength -- physical function -- obesity -- reliability; Sports -- Periodicals; Sports -- Physiological aspects -- Periodicals; Sports -- Psychological aspects -- Periodicals; 612.044
• DOI: 10.1080/02640414.2018.1553500
• Languages: English
• ISSNs: 0264-0414

Abstract

ABSTRACT: This study examined the relationship between sit-to-stand (STS) power and physical function in adults with severe obesity. Thirty-eight adults (age: 44 ± 12 years; body mass index [BMI]: 45.2 ± 7.8 kg/m 2 ) completed evaluations of STS power, strength and functional performance. STS power was measured with a wearable inertial sensor, strength was assessed with the isometric mid-thigh pull, and function was measured with the timed up-and-go (TUG), six-minute walk test (6MWT) and 30-s chair STS. Power and strength (normalised to body mass) entered regression models in addition to age, gender, BMI and physical activity (daily step count). Power displayed large univariate associations with TUG ( r = 0.50) and 30-s chair STS ( r = 0.67), and a moderate association with 6MWT ( r = 0.49). Forward stepwise regression revealed that power independently contributed to TUG (β = −0.40, p = 0.010), 30-s chair STS (β = 0.67, p < 0.001) and 6MWT performance (β = 0.27, p = 0.007). Power also appeared to be a superior determinant of function compared with strength. Power generated via the STS transfer largely underpins the ability to perform functional tasks in adults with severe obesity, although intervention studies are required to investigate a potentially causal relationship.