Low levels of exercise are beneficial for adults

Even low levels of leisure-time physical activities are beneficial for adults, whilst doing more vigorous exercise has additional health benefits in terms of reducing mortality.  Authors call for the promotion of any amount and intensity of physical activity, to reduce mortality risk in the general population | British Journal of Sports Medicine

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Abstract
Background:  Evidence on the role of very low or very high volumes of leisure time physical activity (PA) on the risk of all-cause and cause-specific mortality is limited. We aimed to examine the associations of different levels of leisure time PA with the risk of all-cause, cardiovascular disease (CVD) and cancer-specific mortality.

Methods:  Data were from 12 waves of the National Health Interview Surveys (1997–2008) linked to the National Death Index records through 31 December 2011. A total of 88 140 eligible participants aged 40–85 years were included.

Results:  Compared with inactive individuals, those performing 10–59 min/week of PA had 18% lower risk of all-cause mortality. Those who reported 1–2 times (150–299 min/week) the recommended level of leisure time PA had 31% reduced risk of all-cause mortality. Importantly, the continued benefits were observed among those performing leisure time PA 10 or more times the recommended minimum level. In addition, there was a larger reduction in all-cause and cause-specific mortality for vigorous vs. moderate intensity PA.

Conclusions: We found that beneficial association between leisure time PA and mortality starts from a low dose. Doing more vigorous exercise could lead to additional health benefits.

Full abstract at British Journal of Sports Medicine

Full reference: Zhao M, Veeranki SP, Li S, et al | Beneficial associations of low and large doses of leisure time physical activity with all-cause, cardiovascular disease and cancer mortality: a national cohort study of 88,140 US adults | British Journal of Sports Medicine | Published Online First: 19 March 2019

See also: Even low amounts of exercise are beneficial | OnMedica

How diet, nutrition and physical activity affect cancer risk

The World Cancer Research Fund have published an interactive infographic summarising risk factors for certain cancers.

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The full report summarises the wealth of evidence on how diet, nutrition and physical activity can influence the biological processes that underpin the development and progression of cancer.

The report contains the following 10 exposure sections, covering definitions and background information, issues relating to interpretation of the evidence, the evidence itself ( and judgements on the evidence.

View the Interactive Cancer Risk Matrix

Full report: Diet, Nutrition, Physical Activity and Cancer: a Global Perspective

Changes to diet and exercise could avoid 26,000 cases of cancer a year in women

Around 500 cases of cancer in women every week in the UK could be prevented by keeping a healthy weight and increasing exercise | British Journal of Cancer | story via Cancer Research UK

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The latest figures, calculated from 2015 cancer data, found that whilst smoking remains the biggest preventable cause of cancer, everyday changes to live a little more healthily can have a large impact.

By keeping a healthy weight, drinking less alcohol, eating more fibre, cutting down on processed meat and being more active, more than 26,000 cancer cases in women could be avoided each year.

This equates to 15% of all cancers diagnosed in women each year in the UK. More than 24,000 cases of cancer in men could also be avoided with the same approach.

Full story at Cancer Research UK

Full reference: Brown, K. et al. | The fraction of cancer attributable to known risk factors in England, Wales, Scotland, Northern Ireland, and the UK overall in 2015 | British Journal of Cancer 2018 | Vol. 118 p1130–1141

Physical activity in the community improves mobility for cancer survivors

Programmes to encourage physical activity for people with cancer at home or in local communities have a positive impact on physical function | NIHR Signal

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The changes were generally small to moderate, for example those receiving rehabilitation could walk on average 28 metres further in six minutes. The studies mostly included older people with breast cancer, in whom these small improvements may be important.

Cancer survivors experience changes to their physical function resulting from cancer and its treatments. Restoring function can help people maintain independence.

This review looked at a range of interventions. Those delivered in people’s homes or nearby community settings may be more convenient for people with reduced physical function, and might enable more people to attend. Further research would help to confirm these findings in the UK and to explore implementation issues.

 

Computer-tailored physical activity intervention for prostate and colorectal cancer patients and survivors

Cancer and cancer treatment coincide with substantial negative physical, psychological and psychosocial problems | BMC Cancer

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Background: Physical activity (PA) can positively affect the negative effects of cancer and cancer treatment and thereby increase quality of life in CPS. Nevertheless, only a minority of CPS meet PA guidelines. We developed the OncoActive (OncoActief in Dutch) intervention: a computer-tailored PA program to stimulate PA in prostate and colorectal CPS, because to our knowledge there are only a few PA interventions for these specific cancer types in the Netherlands

Discussion: Using the Intervention Mapping protocol resulted in a systematically adapted, theory and evidence-based intervention providing tailored PA advice to prostate and colorectal CPS. If the intervention turns out to be effective in increasing PA, as evaluated in a RCT, possibilities for nationwide implementation and extension to other cancer types will be explored.

Full reference: Golsteijn, R.H.J. et al. (2017) Development of a computer-tailored physical activity intervention for prostate and colorectal cancer patients and survivors: OncoActive. BMC Cancer. 17:446

Cost-effectiveness of an exercise programme for patients undergoing adjuvant chemotherapy

May, A.M. et al. (2017) BMJ Open. 7:e012187

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Image source: Sancho McCann – Flickr // CC BY 2.0

Objective: Meta-analyses show that exercise interventions during cancer treatment reduce cancer-related fatigue. However, little is known about the cost-effectiveness of such interventions. Here we aim to assess the cost-effectiveness of the 18-week physical activity during cancer treatment (PACT) intervention for patients with breast and colon cancer. The PACT trial showed beneficial effects for fatigue and physical fitness.

 

Results: For colon cancer, the cost-effectiveness analysis showed beneficial effects of the exercise intervention with incremental costs savings of €4321 and QALY improvements of 0.03. 100% of bootstrap simulations indicated that the intervention is dominant (ie, cheaper and more effective). For breast cancer, the results did not indicate that the exercise intervention was cost-effective. Incremental costs were €2912, and the incremental effect was 0.01 QALY. At a Dutch threshold value of €20 000 per QALY, the probability that the intervention is cost-effective was 2%.

Conclusions: Our results suggest that the 18-week exercise programme was cost-effective for colon cancer, but not for breast cancer.

Read the full article here

Comparison of Pharmaceutical, Psychological, and Exercise Treatments for Cancer-Related Fatigue

Mustian, K.M. et al. JAMA Oncology | Published online: 2 March 2017

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Question: Which of the 4 most commonly recommended treatments for cancer-related-fatigue—exercise, psychological, the combination of exercise and psychological, and pharmaceutical—is the most effective?

Findings: This meta-analysis of 113 unique studies (11 525 unique participants) found that exercise and psychological interventions and the combination of both reduce cancer-related fatigue during and after cancer treatment. Reduction was not due to time, attention, or education. In contrast, pharmaceutical interventions do not improve cancer-related fatigue to the same magnitude.

Meaning: Clinicians should prescribe exercise and/or psychological interventions as first-line treatments for cancer-related fatigue.

Read the abstract here