Publications by authors named "Robert U Newton"

Purpose: Reducing recurrence and mortality is crucial for breast cancer survivors. We investigated the effects of a 12-week resistance training (RT) vs high-intensity interval training (HIIT) program on myokines, cytokines secreted by skeletal muscle cells at rest in response to muscle contraction, and cancer cell inhibition.

Methods: Twenty-eight survivors of breast cancer (age 55.

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Exercise is increasingly recognized by patients, clinicians, and allied health professionals globally as an important component of cancer care. In this paper, we provide a viewpoint on developments in exercise oncology over the past 4 decades leading up to the creation of the International Society of Exercise Oncology (ISEO). We briefly review research in adult and pediatric cancers from early foundation studies to larger randomized controlled trials published in mainstream oncology journals alongside critical work undertaken in exercise and cancer biological mechanisms.

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Exercise oncology has emerged as a distinctive area of research and clinical practice. To obtain a global overview of this field, we summarize viewpoints from experts across 6 continents on (1) the scope of exercise oncology research and programs, (2) the availability of reimbursement for cancer exercise services, and (3) pathways and initiatives for developing the exercise oncology workforce. From an international perspective, the field of exercise oncology has progressed substantially; however, gains made to date are uneven, with general underdevelopment in Africa, Asia, and South and Central America.

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Numerous exercise oncology trials have been completed, greatly informing exercise recommendations for patients with cancer. Exercise medicine can be administered in various types, doses, and schedules at various time points. Advancing precision exercise medicine requires understanding of how the effects of different exercise interventions vary by characteristics of individual patients.

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Introduction: This systematic review and meta-analysis aimed to evaluate the effects of exercise interventions on bone mineral density (BMD), bone mineral content (BMC), and bone turnover markers in patients with cancer and compromised bone health.

Materials And Methods: A comprehensive search of four electronic databases was conducted to identify randomized controlled trials evaluating the effect of exercise intervention compared to supplementation or bone-targeted agents only on BMD, BMC and bone turnover markers. Meta-analyses were performed using random-effects models to calculate effect sizes (ES) with 95% confidence intervals (CI).

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Unlabelled: Skeletal muscle loss during chemotherapy has been associated with poorer outcomes and reduced survival across several types of cancer. However, the extent and progression of muscle loss during treatment for childhood cancers remain unclear. A better understanding could help identify children at increased risk and inform the timing of targeted intervention.

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Purpose: Inflammation plays a key role in breast cancer recurrence and mortality by promoting tumor progression. Exercise significantly reduces pro-inflammatory markers such as IL-6, TNF-α, and CRP, potentially reducing mortality risk. However, it is yet to be determined whether exercise-induced changes in body composition can modulate inflammatory biomarker responses in the breast cancer setting.

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Purpose: Breast cancer is the leading cause of cancer-related death in women, highlighting the need for strategies to mitigate recurrence and mortality. We examined the effects of a single bout of resistance training (RT) versus high-intensity interval training (HIIT) on anti-cancer myokines and in vitro cancer cell suppression.

Methods: Thirty-two survivors of breast cancer were randomly allocated to a single bout of RT (n = 16) or HIIT (n = 16).

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Purpose: This study aimed to investigate whether socio-demographic, clinical, and intervention-related variables moderate the effects of exercise on depression and anxiety symptoms in cancer survivors.

Methods: Data from 26 RCTs in the POLARIS database were analyzed using a one-step individual participant data (IPD) meta-analytic approach with linear mixed models to assess exercise effects on depression and anxiety symptoms (z-scores). Interaction terms were added to these models to explore moderators.

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Purpose: Cardiovascular diseases are a leading cause of non-cancer mortality among patients with cancer, with cardiac autonomic dysfunction identified as a significant predictor of future cardiovascular conditions. Despite the importance of autonomic dysfunction as a prognostic marker being well-established in healthy individuals and other chronic conditions, its role in patients with cancer remains underexplored. This narrative review aims to synthesize existing literature on the role of cardiac autonomic dysfunction in patients with cancer and explore the potential of physical exercise as a non-pharmacological intervention to modulate the autonomic nervous system positively.

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Purpose: The Clinical Oncology Society of Australia (COSA) position statement on exercise in cancer care encourages all healthcare professionals to discuss, recommend, and refer people with cancer to exercise; however, use of these recommendations in practice is unknown.

Methods: Oncology healthcare professionals working in Australia were invited to complete a cross-sectional online survey that assessed contextual factors that influence implementation of COSA exercise guidance in cancer care, based on the Consolidated Framework for Implementation Research.

Results: We received 133 survey responses.

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Background And Objectives: Iron deficiency anaemia is common in patients recovering from major surgery and is associated with poorer post-operative outcomes. We designed a randomized controlled trial treating post-operative anaemia with iron therapy to observe the influence on post-operative recovery.

Materials And Methods: Anaemic patients (haemoglobin [Hb] < 120 g/L for women, Hb < 130 g/L for men) recovering from major abdominal surgery at Fiona Stanley Hospital were recruited.

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Aim: Advanced-stage ovarian cancer survivors often have compromised muscle morphology (muscle mass and density), muscle function (muscle strength and physical function), and health-related quality of life (HRQoL). We recently reported improvements in these outcomes following resistance training. Information on the resistance exercise dose required to improve health-related outcomes is still lacking in this cancer group.

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Kraemer, WJ, Caldwell, LK, Post, EM, Volek, JS, Hagen, JM, Newton, RU, Häkkinen, K, Omonije, O, and Maresh, CM. Endogenous opioid peptides after floatation therapy in resistance trained men. J Strength Cond Res 38(10): 1808-1812, 2024-Floatation-restricted environmental stimulation therapy (Float-REST) has shown improvements in muscle soreness and fatigue.

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Osteoporosis poses a significant concern for childhood cancer survivors (CCS). While recommendations for surveillance and management of bone mineral density (BMD) exist, no systematic review and meta-analysis has been undertaken to quantify BMD Z-scores in childhood cancer patients undergoing cancer treatment and survivors who have completed treatments. Accordingly, we conducted a systematic review with a 3-level mixed-effects meta-analysis to examine the course of BMD Z-scores in childhood cancer patients and survivors and identified possible moderators using meta-regression models.

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Background: Despite advances in breast cancer treatment, recurrence remains common and contributes to higher mortality risk. Among the potential mechanisms, inflammation plays a key role in recurrence by promoting tumor progression. Exercise provides a wide array of health benefits and may reduce inflammation, potentially reducing mortality risk.

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Importance: Sexual dysfunction is a common adverse effect of prostate cancer treatment, and current management strategies do not adequately address physical and psychological causes. Exercise is a potential therapy in the management of sexual dysfunction.

Objective: To investigate the effects of supervised, clinic-based, resistance and aerobic exercise with and without a brief psychosexual education and self-management intervention (PESM) on sexual function in men with prostate cancer compared with usual care.

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Background: Tumour hypoxia resulting from inadequate perfusion is common in many solid tumours, including prostate cancer, and constitutes a major limiting factor in radiation therapy that contributes to treatment resistance. Emerging research in preclinical animal models indicates that exercise has the potential to enhance the efficacy of cancer treatment by modulating tumour perfusion and reducing hypoxia; however, evidence from randomised controlled trials is currently lacking. The 'Exercise medicine as adjunct therapy during RADIation for CAncer of the prostaTE' (ERADICATE) study is designed to investigate the impact of exercise on treatment response, tumour physiology, and adverse effects of treatment in prostate cancer patients undergoing external beam radiation therapy (EBRT).

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Objectives: To examine the association between muscle strength and cardiorespiratory fitness (CRF) with all-cause and cancer-specific mortality in patients diagnosed with cancer, and whether these associations are affected by type and/or stage of cancer.

Method: A systematic review with meta-analysis was carried out. Five bibliographic databases were searched to August 2023.

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Background: This study compared the physical activity level of men with metastatic prostate cancer at baseline of the multicentre INTERVAL-GAP4 trial to the American Cancer Society guidelines and examined associations with physical fitness.

Methods: A total of 140 men on androgen deprivation therapy (ADT) were included in this cross-sectional analysis of baseline data from the INTERVAL-GAP4 trial. Exclusion criteria included a maximum of 1 h of vigorous aerobic exercise or one structured resistance exercise session per week but no restrictions on habitual physical activity.

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Purpose: Breast cancer treatments often lead to unfavourable changes in body composition, physical fitness, and quality of life (QoL). We compared the effects of resistance training (RT) and high-intensity interval training (HIIT) on these outcomes in survivors of breast cancer.

Methods: Twenty-eight survivors of breast cancer, post-treatment (Stage I-III), aged 55.

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Article Synopsis
  • The study examined the structural and functional characteristics of patellar and Achilles tendons in young men engaged in heavy resistance training compared to those who are recreationally active but not weight training.
  • It found that resistance-trained men had significantly greater lean body mass and bone mineral density, along with increased stiffness in the patellar tendon, while the Achilles tendon showed a larger cross-sectional area.
  • Despite these anatomical differences, serum collagen turnover markers showed no significant variation or correlation with tendon properties, suggesting complex interactions at play regarding tendon adaptations to resistance training.
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Background And Objective: An array of treatment-related toxicities result from androgen deprivation therapy (ADT) in patients with prostate cancer (PCa), compromising function and health-related quality of life (HRQoL). Exercise has been demonstrated to counter a number of these adverse effects including decreased HRQoL; however, when exercise should be initiated is less clear. This study aims to examine whether commencing exercise when ADT is initiated rather than later during treatment is more effective in countering adverse effects on HRQoL.

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Exercise is a therapeutic approach in cancer treatment, providing several benefits. Moreover, exercise is associated with a reduced risk for developing a range of cancers and for their recurrence, as well as with improving survival, even though the underlying mechanisms remain unclear. Preclinical and clinical evidence shows that the acute effects of a single exercise session can suppress the growth of various cancer cell lines in vitro.

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Article Synopsis
  • - The study aimed to investigate whether adding creatine supplementation to resistance exercise could offer more benefits for men with prostate cancer undergoing androgen deprivation therapy (ADT) than resistance exercise alone, particularly in terms of lean mass, strength, and physical function.
  • - Conducted over 12 weeks with 30 participants, the trial compared two groups: one performing resistance exercise with a placebo and the other with creatine, both achieving significant improvements in lean mass, muscle strength, and physical function.
  • - The results showed that while both groups experienced similar improvements in the measured outcomes, there were no significant differences between the groups, suggesting that creatine supplementation doesn't provide additional benefits over resistance exercise alone.
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