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  • Do Exercise Oncology Guidelines Have To Be Met To Obtain Improvements In Breast Cancer Outcomes?

    Author(s)
    Sandler, Carolina X
    Spence, Rosa
    Rye, Sheree
    Singh, Ben
    Tanner, Jodie
    Hayes, Sandi
    Griffith University Author(s)
    Spence, Rosa
    Hayes, Sandi C.
    Year published
    2020
    Metadata
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    Abstract
    PURPOSE: To explore whether compliance to weekly exercise targets predicts improvements in outcomes in women with breast cancer who participated in SAFE ACTRN12616000954426. METHODS: Physically inactive breast cancer survivors (stage II-IV; mean age 50.1±9.0) were randomised to frequent- (20 sessions, n=30) or limited (5 sessions, n=30) supervision with an exercise physiologist during a 12-week individually-tailored exercise intervention. The weekly exercise target was consistent with international guidelines of 600 MET minutes including at least 2 resistance exercise sessions. Exercise undertaken (mode, frequency, minutes, ...
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    PURPOSE: To explore whether compliance to weekly exercise targets predicts improvements in outcomes in women with breast cancer who participated in SAFE ACTRN12616000954426. METHODS: Physically inactive breast cancer survivors (stage II-IV; mean age 50.1±9.0) were randomised to frequent- (20 sessions, n=30) or limited (5 sessions, n=30) supervision with an exercise physiologist during a 12-week individually-tailored exercise intervention. The weekly exercise target was consistent with international guidelines of 600 MET minutes including at least 2 resistance exercise sessions. Exercise undertaken (mode, frequency, minutes, intensity) was recorded weekly and used to calculate MET mins. Exercise compliance was defined as 1) average weekly volume ≥ weekly target or 2) weekly target met in ≥ 80% of weeks. Multivariable regression analyses (adjustment for age, disease stage, BMI and group allocation) were used to evaluate whether exercise compliance predicted change between pre- and post-intervention in physical health (PROMIS global), aerobic fitness (6-minute walk test) and strength (YMCA bench press). RESULTS: 63% and 27% of sample (n=60) were compliant when defined by average weekly volume and ≥80% of weeks, respectively. Having an average weekly exercise volume that was ≥ weekly target predicted a clinically meaningful improvement in physical health (Δ±SE: 7.2±1.0 p<0.01), aerobic fitness (59.8±11.4 metres, p<0.05) and upper body strength (11.4±2.2, p=0.25). Meeting weekly targets ≥80% of intervention weeks did not predict change in outcomes (p≥0.05). CONCLUSION: These findings suggest that for achieving improvements in outcomes, it is important to ensure the volume of exercise undertaken over time meet targets, but that achieving weekly exercise volume targets on any given week is not. This represents reassuring evidence, particularly for patients who have short term declines in exercise undertaken as a consequence of accommodating fluctuating treatment-related symptoms, surgery requirements or new life circumstances.
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    Conference Title
    Medicine & Science in Sports & Exercise
    Volume
    52
    Issue
    7S
    DOI
    https://doi.org/10.1249/01.mss.0000679176.37837.8e
    Subject
    Oncology and carcinogenesis not elsewhere classified
    Sports science and exercise not elsewhere classified
    Allied health and rehabilitation science not elsewhere classified
    Science & Technology
    Life Sciences & Biomedicine
    Publication URI
    http://hdl.handle.net/10072/401664
    Collection
    • Conference outputs

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