Development of a Reference Chart for Monitoring Cancer-Related Fatigue Throughout a Supervised Exercise Program

Cancer-related fatigue is associated with objective measures of physical function before and after a clinical exercise program: A retrospective analysis

Background:

Cancer-related fatigue (CRF) is a common symptom reported by survivors of cancer. CRF is associated with reduced self-reported physical function, but associations with objective measures of physical function are less robust. Exercise programs have been shown to improve both CRF and objective physical function, but the interaction of exercise, CRF, and function has not been explored.

Methods:

Retrospective data were collected from baseline (n = 420) and final assessments (n = 234) of survivors who participated in a 3-month clinical exercise program. Assessments included measures of CRF (Functional Assessment of Chronic Illness Therapy–Fatigue) and physical function (6-minute walk test, usual and fast gait speed, 30-second sit-to-stand test, and the Timed Up and Go test). Multiple regression analyses investigated associations between CRF and physical function before and after the program. CRF and functional changes following the program were calculated and associations investigated with multiple regressions.

Results:

All measures of CRF and physical function significantly improved following the program (P < .01). CRF was associated with all functional measures at baseline (standardized β = −0.18 to 0.29, P < .01) and final assessments (r = −0.27 to 0.26, P < .01). Changes in CRF were associated with changes in function (standardized β = −0.12 to 0.23, P < .05), except usual gait speed (P = .17).

Conclusion:

This investigation demonstrated associations between CRF and objective physical function before and after participation in an exercise program. The 3-way interaction between CRF, physical function, and exercise can be used clinically to personalize rehabilitation strategies. Future studies should investigate changes in CRF and function during an exercise program.

Nonlinear, Multicomponent Physical Exercise With Heart Rate Variability-Guided Prescription in Women With Breast Cancer During Treatment: Feasibility and Preliminary Results (ATOPE Study)

OBJECTIVE

The purpose of this study was to examine the feasibility, safety, adherence, and preliminary efficacy of the ATOPE program during radiotherapy (RT) or chemotherapy (CT) for women with breast cancer.

METHODS

This single-blind, pretest-posttest feasibility study included 38 women with breast cancer at the beginning of their treatment. The ATOPE program consisted of 12 to 18 sessions of a multimodal physical exercise program, prescribed based on daily heart rate variability and clinimetric assessments using the ATOPE+ mHealth system. Overall health was assessed with quality of life, autonomous balance, and body composition, whereas health-related fitness was measured through functional capacity, physical activity levels, and upper and lower limb strength.

RESULTS

The rates of recruitment, retention, and adherence were 52.35, 73.68, and 84.37%, respectively, and the satisfaction rating was 9.2 out of a possible 10 points. The perceived health status change score was 3.83 points, scored on a -5 to 5 point scale. No adverse effects were found. Compliance results showed that the ATOPE+ mHealth system was used on 73.38% of the days, and the Fitbit bracelet (Google, Mountain View, CA, USA) was used on 84.91% of the days. Women stayed physically active 55% of days. Regarding preliminary results, for overall health, the percentage of body fat in the RT group decreased by 1.93%, whereas it increased by 5.03% in the CT group. Lower limb strength increased in the RT group, specifically knee extensor isometric strength (6.07%), isokinetic knee flexors 180 degree/second (1.53%), and isokinetic knee extensors 300 degree/second (4.53%), in contrast with the reductions found in the CT group (11.07, 18.67, and 14.89%, respectively).

CONCLUSION

The ATOPE program, through nonlinear prescription based on daily monitoring with the ATOPE+ mHealth system, is feasible and safe for application during breast cancer treatment. The results suggest that the overall health can be maintained or even improved regarding most variables.

IMPACT

This study focused on the feasibility, safety, and completion of a physical therapist-led program at early diagnosis for adults with breast cancer. The multimodal, supervised, tailored, nonlinear physical exercise program is feasible and safe, showed a good completion rate, and was able to prevent the quality-of-life deficits that are often triggered by systemic breast cancer treatment. This study highlights the importance of daily morning assessments using the ATOPE+ mHealth system in patients with breast cancer to prescribe nonlinear physical exercise.

Cancer-related fatigue mediates the relationships between physical fitness and attendance and quality of life after participation in a clinical exercise program for survivors of cancer

PURPOSE

Cancer-related fatigue (CRF) is a common and limiting symptom reported by survivors of cancer, negatively impacting health-related quality of life (HRQoL). Exercise improves CRF, HRQoL, and physical fitness in survivors. Prospective research trials have shown that exercise-associated fitness improvements effects on HRQoL are mediated by CRF; however, this has not been investigated in a pragmatic real-world setting. This study utilizes data from a large heterogenous population of survivors participating in a clinical exercise program to investigate this mediation effect, as well as effects of program attendance.

METHODS

Data were collected from 194 survivors completing the BfitBwell Cancer Exercise Program (July 2016-February 2020). Changes in HRQoL, CRF, and fitness were calculated and program attendance collected. Basic correlation analyses were performed. Linear regression analyses were performed to assess mediation by CRF.

RESULTS

All measures of CRF, HRQoL, and physical fitness significantly improved following the exercise program. Improvements in physical fitness were significantly correlated with improvements in HRQoL (r = 0.15-0.18), as was program attendance (r = 0.26) and CRF (r = 0.59). The effects of physical fitness and program attendance on HRQoL were at least partially mediated by the effects of CRF.

CONCLUSION

This study extends research findings on how exercise programs improve HRQoL in survivors of cancer to a real-world setting. Results indicate that clinical exercise programs should target reductions in CRF in survivors (during or after treatment) through improvements in physical fitness to improve HRQoL and that high attendance should be encouraged regardless of fitness changes.