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Evaluating Individual Level Change in Physical Function Response Following an Exercise Program for Cancer Survivors

Overview
Specialties Critical Care
Oncology
Date 2023 May 26
PMID 37233792
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Abstract

Purpose: Cancer survivors physical function response to exercise programs at the group level is well-established. However, to advance toward a more personalized approach in exercise oncology, a greater understanding of individual response is needed. This study utilized data from a well-established cancer-exercise program to evaluate the heterogeneity of physical function response and explore characteristics of participants who did vs. did not achieve a minimal clinically important difference (MCID).

Methods: Physical function measures (grip strength, 6-min walk test (6MWT), and sit-to-stand) were completed pre/post the 3-month program. Change scores for each participant and the proportion achieving the MCID for each physical function measure were calculated. The independent t-tests, Fisher's exact test, and decision tree analyses were used to explore differences in age, body mass index (BMI), treatment status, exercise session attendance, and baseline value between participants who achieved the MCID vs. those who did not.

Results: Participants (N = 250) were 55 ± 14 years old, majority female (69.2%), white (84.1%), and diagnosed with breast cancer (36.8%). Change in grip strength ranged from - 42.1 to + 47.0 lb, and 14.8% achieved the MCID. Change in 6MWT ranged from - 151 to + 252 m, and 59% achieved the MCID. Change in sit-to-stand ranged from - 13 to + 20 reps, and 63% achieved the MCID. Baseline grip strength, age, BMI, and exercise session attendance were related to achieving MCID.

Conclusions: Findings illustrate wide variability in the magnitude of cancer survivors' physical function response following an exercise program, and that a variety of factors predict response. Further investigation into the biological, behavioral, physiological, and genetic factors will inform tailoring of exercise interventions and programs to maximize the proportion of cancer survivors who can derive clinically meaningful benefits.

References
1.
Basen-Engquist K, Alfano C, Maitin-Shepard M, Thomson C, Schmitz K, Pinto B . Agenda for Translating Physical Activity, Nutrition, and Weight Management Interventions for Cancer Survivors into Clinical and Community Practice. Obesity (Silver Spring). 2017; 25 Suppl 2:S9-S22. PMC: 5683412. DOI: 10.1002/oby.22031. View

2.
Bohannon R . Minimal clinically important difference for grip strength: a systematic review. J Phys Ther Sci. 2019; 31(1):75-78. PMC: 6348186. DOI: 10.1589/jpts.31.75. View

3.
Bohannon R, Crouch R . Minimal clinically important difference for change in 6-minute walk test distance of adults with pathology: a systematic review. J Eval Clin Pract. 2016; 23(2):377-381. DOI: 10.1111/jep.12629. View

4.
Bouchard C, Rankinen T . Individual differences in response to regular physical activity. Med Sci Sports Exerc. 2001; 33(6 Suppl):S446-51; discussion S452-3. DOI: 10.1097/00005768-200106001-00013. View

5.
Buffart L, Sweegers M, May A, Chinapaw M, VAN Vulpen J, Newton R . Targeting Exercise Interventions to Patients With Cancer in Need: An Individual Patient Data Meta-Analysis. J Natl Cancer Inst. 2018; 110(11):1190-1200. PMC: 6454466. DOI: 10.1093/jnci/djy161. View