Article

OBJECTIVE: To characterize the relationship between 1-repetition maximum (1-RM)
bench press strength and isometric handgrip strength among breast cancer
survivors. DESIGN: Cross-sectional study. SETTING: Laboratory. PARTICIPANTS:
Community-dwelling breast cancer survivors (N=295). INTERVENTIONS: Not
applicable. MAIN OUTCOME MEASURE: 1-RM bench press strength was measured with a
barbell and exercise bench. Isometric handgrip strength was measured using an
isometric dynamometer, with 3 maximal contractions of the left and right hands.
All measures were conducted by staff with training in clinical exercise testing.
RESULTS: Among 295 breast cancer survivors, 1-RM bench press strength was
18.2+/-6.1kg (range, 2.2-43.0kg), and isometric handgrip strength was
23.5+/-5.8kg (range, 9.0-43.0kg). The strongest correlate of 1-RM bench press
strength was the average isometric handgrip strength of both hands (r=.399;
P<.0001). Mean difference analysis suggested that the average isometric handgrip
strength of both hands overestimated 1-RM bench press strength by 4.7kg (95%
limits of agreement, -8.2 to 17.6kg). In a multivariable linear regression model,
the average isometric handgrip strength of both hands (beta=.31; P<.0001) and age
(beta=-.20; P<.0001) were positively correlated with 1-RM bench press strength
(R2=.23). CONCLUSIONS: Isometric handgrip strength is a poor surrogate for 1-RM
bench press strength among breast cancer survivors. 1-RM bench press strength and
isometric handgrip strength quantify distinct components of muscular strength.
CI - Copyright (c) 2016 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS