Abstract Funding Acknowledgements Type of funding sources: None. Background Cardiorespiratory fitness (CRF), assessed by peak oxygen uptake (VO2peak), is a powerful predictor of cardiovascular morbidity and mortality. However, performance of a cardiopulmonary exercise test (CPET) is often not feasible or desirable in (older) frail patients, because of physical limitations, transport difficulties, costs and the additional exposure to risks. Other CRF assessment tools, such as questionnaires, are potential alternatives, but have not been validated in frail elderly populations with chronic cardiovascular disease. Purpose The purpose of this study was to investigate the accuracy of two self-reported questionnaires, the FitMáx©-questionnaire and The Fitness Calculator, for assessment of CRF in chronic heart failure (CHF) patients. Methods CHF patients referred for CPET as part of a cardiac rehabilitation programme were eligible for the study. VO2peak was measured with a symptom limited maximal CPET. Participants completed two questionnaires to estimate VO2peak: the FitMáx-questionnaire and The Fitness Calculator. The FitMáx-questionnaire consists of three questions on walking, cycling and climbing stairs [1], and The Fitness Calculator is based on the HUNT3 study [2] and is currently advised by the American heart association as a non-exercise estimate for CRF [3]. Results 29 CHF patients (21 men, 64.2 years ± 12.0) were included with mean VO2peak of 15.7 ± 4.2 mL/kg/min at CPET. Correlation analysis indicated a moderate association between VO2peak assessed by the FitMáx-questionnaire and measured by CPET (r = 0.52) with a mean bias of 1.7 mL/kg/min (95% CI -6.0 – 9.4, p = 0.03). No association was found between VO2peak assessed by CPET and The Fitness Calculator (r = 0.24), mean bias 14.6 mL/kg/min (95% CI -0.5 – 29.7, p <.01). Conclusion The FitMáx©-questionnaire is a moderately accurate tool for estimating CRF in the CHF population. For use in individual patients, efforts should be made to improve the accuracy in this specific patient group. To establish its clinical utility, additional research is needed to evaluate its reproducibility and sensitivity to detect interventional changes in this population.

Colorectal cancer surgery results in considerable postoperative morbidity, mortality and reduced quality of life. As many patients will undergo additional (neo)adjuvant therapy, it is imperative that each individual optimize their physical function. To elucidate the potential of exercise in patient optimization, we investigated the evidence for an exercise program before and after surgical treatment in colorectal cancer patients. A systematic review was conducted according to the Cochrane Handbook for Systematic Reviews of Interventions, the guidelines of the Physical Therapy Journal and the PRISMA guidelines. No literature pertaining to exercise training during preoperative neoadjuvant treatment was found. Seven studies, investigating the effects of regular exercise during adjuvant chemotherapy for patients with colorectal cancer or a mixed population, were identified. A small effect (effect size (ES) 0.4) of endurance/interval training and strength training (ES 0.4) was found in two studies conducted in patients with colorectal and gastrointestinal cancer. In five studies that included a mixed population of cancer patients, interval training resulted in a large improvement (ES 1.5; P≤.05). Endurance training alone was found to increase both lower extremity strength and endurance capacity. The effects of strength training in the lower extremity are moderate, whereas, in the upper extremity, the increase is small. There is limited evidence available on exercise training during treatment in colorectal cancer patients. One study concluded exercise therapy may be beneficial for colorectal cancer patients during adjuvant treatment. The possible advantages of training during neoadjuvant treatment may be explored by prehabilitation trials.

This study aimed to evaluate the long-term effectiveness and cost-effectiveness of high intensity (HI) versus low-to-moderate intensity (LMI) exercise on physical fitness, fatigue, and health-related quality of life (HRQoL) in cancer survivors.

Exercise-related intermittent claudication is marked by reduced blood flow to extremities caused by either stenosis or impaired vascular function. Although intermittent claudication is common in the elderly, it rarely occurs in the young and middle-aged individuals. Here, we report a case of exercise-related claudication in a 41-year-old woman, in the absence of overt vascular pathology. Using a series of imaging and functional tests, we established that her complaints were due to impaired arterial vasodilation, possibly due to a defect in nitrous oxide-mediated dilation. The symptoms were reversible upon administration of a calcium antagonist, showing reversibility of the vascular impairment. Identification of reversible vascular "stiffness" merits consideration in young and otherwise healthy subjects with claudication of unknown origin.

Introduction: Endurance athletes may suffer from intermittent claudication. A subgroup of 16% has severe iliac artery stenosis due to endofibrosis. In this study we report the short- and mid-term results of endarterectomy with venous patching.Patients/methods: Athletes with claudication-like complaints were analysed using a protocol including cycling test and provocative echo-Doppler. Thirty-six athletes were diagnosed with serious iliac flow limitation (one bilateral), confirmed by additional magnetic resonance (MR) angiography. Endarterectomy with venous patching was performed for 32 iliac artery stenosis and five occlusions. Postoperative (mean 15.6 months) 33 legs were evaluated using the same diagnostic protocol. A complete follow-up after mean 29 months was obtained by questionnaire.Results: Twenty-eight athletes were symptom free or could perform on a desired level with minor remaining complaints. Two athletes were satisfied though minor complaints prohibited high competition performance. Two athletes developed a re-stenosis and became symptom free after an additional operation. Three athletes had objective improvement but limited decrease in symptoms. One was unsatisfied but refused postoperative tests. The only major surgical complication was a postoperative bleeding necessitating re-operation. Postoperative tests showed significant increase in maximal workload and post-exercise ankle brachial index. No aneurysm formation was detected.Conclusions: Precise diagnosis and meticulously performed endarterectomy with vein patching have satisfactory results in mid-term follow-up with acceptable risk in endurance athletes complaining of intermittent claudication due to iliac artery stenosis. (C) 2012 European Society for Vascular Surgery. Published by Elsevier Ltd. All rights reserved.

Introduction: Kinking and endofibrosis of the iliac arteries are uncommon and poorly recognized conditions affecting young endurance athletes. Deformation or progressive stenosis of the iliac artery may reduce blood flow to the lower limb and adversely affect performance. The aim of this review was to examine the existing literature relating to these flow-limiting phenomena and identify a clear, unifying strategy for the assessment and management of affected patients.Methods: A systematic review of the literature was performed. A comprehensive search was carried out using Medline, Embase and The Cochrane Database to identify relevant articles published between 1950 and 2011 (last search date 05/08/2011). This search (and additional bibliography review) identified 413 articles, of which 367 were excluded. 46 articles were then studied in detail. Methodological quality of studies was assessed according to Scottish Intercollegiate Guideline Network criteria.Results: Focussed history and examination can successfully identify nearly 80% of patients with iliac flow limitation. However, both provocative exercise tests and detailed imaging are also necessary to identify those in need of intervention and establish most appropriate treatment. Provocative exercise tests and duplex imaging can then be used to confirm flow limitation before detailed assessment of abnormal anatomy with MRA and DSA. These multiple imaging modalities are necessary to identify those most likely to benefit from surgery and clarify whether each patient should undergo arterial release, vessel shortening, endofibrosectomy or interposition grafting.Conclusion: We present a systematic review of the literature together with a proposed algorithm for diagnosis and management of these iliac flow limitations in endurance athletes. (C) 2011 European Society for Vascular Surgery. Published by Elsevier Ltd. All rights reserved.

Background: In 2005 the Dutch national guidelines for treatment of breast cancer were updated. From then onwards, patients with operable breast cancer, who formerly received four cycles of adjuvant chemotherapy with doxorubicin/cyclophosphamide (AC), were treated with five cycles Of 5-fluorouracil/epirubicin/cyclophosphamide (FEC), based on data suggesting survival benefit.Primary objective: evaluation of the effect on quality-of-life and trainability after four AC versus five FEC cycles of polychemotherapy. Secondary objective: evaluation of the effectiveness of an 18-week training programme for breast cancer survivors.Methods: A prospective cohort study design was used, comparing two chemotherapy regimens historically. The first cohort (group 1) received 4AC (A 60 mg/m(2), C 600 mg/m(2)) (n=25) and the second cohort (group 2) received 5FEC (F 500 mg/m(2), E 90 mg/m(2), C 500 mg/m(2)) (n=50) adjuvant polychemotherapy. Both groups completed an 18-week high-intensity strength-training programme. Outcome measures were changes in quality-of-life (EORTC-QLQ-C30, MFI-20), muscular strength (one-repetition maximum; leg press) and cardiopulmonary function (VO2max) between baseline and follow-up.Results: Between March 2002 and February 2006, 75 female subjects with breast cancer participated in this study. Baseline characteristics were similar in both groups. After completing the training programme, both groups showed a significant improvement in all outcome measures. No significant differences in changes of the EORTC-QLQ-C30 and MFI-20, one repetition maximum of the leg press and the VO2max between the two groups were demonstrated.Conclusion: After adaptation of the Dutch national breast cancer treatment guidelines, patients received prolonged and increased doses of anthracyclines. This, however, did not result in a difference in the baseline situation before rehabilitation and in training response, nor in quality of life between the two groups.

This systematic review summarizes the research of previous studies that used resistance training in the post-treatment phase of cancer patients with a focus on methodological quality, training methods and physical outcome measures. We found twenty-four studies (10 RCTs, 4 controlled clinical trials and 10 uncontrolled trials) that met all inclusion criteria. The studies were of moderate methodological quality. The majority of studies involved breast cancer patients (54%), followed by prostate cancer patients (13%). Most studies used a combination of resistance and aerobic training, which was mostly supervised. Resistance training involved large muscle groups, with 1-3 sets of 8-12 repetitions. The duration of the resistance training programs varied from 3-24 weeks, with a training frequency of 1-5 sessions per week. The training intensity ranged from 25% to 85% of the one-repetition maximum. Overall, positive training effects were observed for cardiopulmonary and muscle function, with significant increases in peak oxygen uptake (range: 6-39%), and in the one-repetition maximum (range: 11-110%). In general, there were no effects of training on body composition, endocrine and immune function, and haematological variables. No adverse effects of the resistance training were reported. Based upon these results, we recommend to incorporate resistance training in cancer rehabilitation programmes.

One of the hallmark symptoms of patients with chronic heart failure (CHF) is exercise intolerance. Therefore, exercise testing has become an important tool for the evaluation and monitoring of heart failure. Whereas the maximal aerobic capacity (peak VO2) is a reliable indicator of the severity and prognosis of heart failure, submaximal exercise parameters may be more closely related to the ability to perform daily activities. As such, oxygen (O2) uptake kinetics, describing the rate change of O2 uptake during onset or recovery of submaximal constant-load exercise (O2 onset and recovery kinetics, respectively), have been shown to be useful parameters for objectively evaluating the functional capacity of CHF patients. However, their evaluation in this population is not a routine part of daily clinical practice. Possible reasons for this include a lack of standardisation of the assessment methodology and a limited number of studies evaluating the clinical use of O2 uptake kinetics in CHF patients. In addition, the pathophysiological mechanisms underlying the delay in O2 uptake kinetics in these patients are not completely understood. This review discusses the current literature on the clinical potency and physiological determinants of O2 uptake kinetics in CHF patients and provides directions for future research. (Neth Heart J 2009;17:238–44.)

The short-term beneficial effects of physical rehabilitation programmes after cancer treatment have been described. However, little is known regarding the long-term effects. The purpose of this study was to investigate the long-term effects of high-intensity resistance training compared with traditional recovery. A total of 68 cancer survivors who completed an 18-week resistance training programme were followed for 1 year. During the 1-year follow-up, 19 patients dropped out (14 due to recurrence of cancer). The remaining 49 patients of the intervention group were compared with a group of 22 patients treated with chemotherapy in the same period but not participating in any rehabilitation programme. Outcome measures were muscle strength, cardiopulmonary function, fatigue, and health-related quality of life. One year after completion of the rehabilitation programme, the outcome measures in the intervention group were still at the same level as immediately after rehabilitation. Muscle strength at 1 year was significantly higher in patients who completed the resistance training programme than in the comparison group. High-intensity resistance training has persistent effects on muscle strength, cardiopulmonary function, quality of life, and fatigue. Rehabilitation programmes for patients treated with chemotherapy with a curative intention should include high-intensity resistance training in their programme.

OBJECTIVE To determine the feasibility and the benefits of combined resistance and interval exercise training on phenotype characteristics and skeletal muscle function in deconditioned, type 2 diabetes (T2D) patients with polyneuropathy. DESIGN Short-term, single-arm intervention trial. METHODS Eleven male T2D patients (age: 59.1+/-7.5 years; body mass index: 32.2+/-4.0 kg/m2) performed progressive resistance and interval exercise training thrice a week for 10 weeks. Besides primary diabetes outcome measures, muscle strength (MUST), maximal workload capacity (Wmax), whole-body peak oxygen uptake (VO2peak) and muscle oxidative capacity (MUOX), intramyocellular lipid (IMCL) and glycogen (IMCG) storage, and systemic inflammation markers were determined before and after training. Daily exogenous insulin requirements (EIR) and historic individualized EIR were gathered and analysed. RESULTS MUST and Wmax increased with 17% (90% confidence intervals 9-24%) and 14% (6-21) respectively. Furthermore, mean arterial blood pressure declined with 5.5 mmHg (-9.7 to -1.4). EIR dropped with 5.0 IU/d (-11.5 to 1.5) compared with baseline. A decline of respectively -0.7 mmol/l (-2.9 to 1.5) and -147 micromol/l (-296 to 2) in fasting plasma glucose and non-esterified fatty acids concentrations were observed following the intervention, but these were not accompanied by changes in VO2peak, MUOX, IMCL or IMCG, and blood glycolysated haemoglobin, adiponectin, tumor necrosis factor-alpha and/or cholesterol concentrations. CONCLUSION Short-term resistance and interval exercise training is feasible in deconditioned T2D patients with polyneuropathy and accompanied by moderate improvements in muscle function and blood pressure. Such a specific exercise regimen may provide a better framework for future exercise intervention programmes in the treatment of deconditioned T2D patients.

AIMS:To study the course and circumstances of atrial fibrillation in endurance sports. BACKGROUND:Atrial fibrillation is the main cause of symptoms in athletes and frequently disturbs the performance during the practising of sport. The course of the arrhythmia is seldom reported in this population. METHODS:In 1993 and 2002 symptoms and clinical presentation of atrial fibrillation were evaluated in 30 well-trained athletes with a specially designed questionnaire. RESULTS:In 1993 paroxysmal atrial fibrillation was present in 30 male athletes at the mean age of 48.1 +/- 7.8, 3 (10%) of them also had paroxysmal atrial flutter. Three (10%) of the athletes died before 2002. In 2002 paroxysmal atrial fibrillation continued in 15 (50%) athletes, permanent atrial fibrillation emerged in 5 (17%) athletes and 7 (23%) of them showed no further atrial fibrillation. In 1993 paroxysms of atrial fibrillation started at a relatively low level of training intensity compared with the mean maximal training intensity of 11 +/- 7 versus 8 +/- 4 h/week (p < 0.05). The first attack of adrenergically induced paroxysmal atrial fibrillation was more often present in younger athletes (p < 0.005) and vagally induced paroxysmal atrial fibrillation was more apparent in older athletes (p < 0.05). In 10 (38%) of the athletes a familiar form of paroxysmal atrial fibrillation was present. CONCLUSION:A small proportion of the athletes (26%) was asymptomatic. Paroxysmal atrial fibrillation remained stable in half of the athletes whereas the arrhythmia changed into permanent atrial fibrillation in a minority of this population.

PURPOSEKinking of the iliac arteries can cause flow limitations in endurance athletes. Such kinking may be treated by surgical release of the iliac arteries. However, when the length of the iliac artery is excessive, this may not be effective. Because threshold values of excessive length of the iliac arteries are unknown, normal values for endurance athletes were obtained and abnormalities encountered in these patients are reported.METHODSForty-three endurance athletes (46 symptomatic legs) with flow limitations in the iliac arteries were examined using magnetic resonance angiography (MRA) with hips extended and flexed. The ratio of vessel length to straight-line distance was determined for the common and external iliac arteries. Sixteen national-level cyclists (32 reference legs) served as a control group.RESULTSFor the common iliac artery, length ratios were significantly (P < 0.05) higher in the symptomatic legs than in the reference legs (symptomatic legs: 1.1 +/- 0.12, 1.22 +/- 0.19, reference legs 1.05 +/- 0.04, 1.11 +/- 0.05 with extended and flexed hips, respectively). For the external iliac artery, only in the position with hips flexed, the ratios in the symptomatic legs were significantly higher than in the reference legs (symptomatic legs: 1.11 +/- 0.09, 1.44 +/- 0.23, reference legs 1.08 +/- 0.05, 1.32 +/- 0.13 with extended and flexed hips, respectively). A small proportion of symptomatic legs had extremely high length ratios.CONCLUSIONMRA is effective for determining vessel length. The ratio of vessel length to straight-line distance with extended and flexed hips is a good measure for excessive vessel length and achieves extreme values in a small subgroup of patients. Further prospective study is warranted to define maximal vessel length ratios, which still allow benefit from surgical release of the iliac arteries.

BACKGROUND:Endurance athletes often have restrictions in flow in their iliac arteries during exercise. Such restrictions have previously been ascribed solely to intravascular lesions. We postulate that flow could also be restricted by functional kinking in the arteries, and that surgical release of these kinks might be an effective treatment.METHODS:We prospectively studied 80 endurance athletes who had complaints suggestive of flow restriction in the iliac arteries of one (n=74) or both (6) legs (total 92 legs). Using vascular diagnostic tools, we examined athletes while they were doing activities that often provoke flow restrictions. Restrictions were determined by measurement of systolic pressure in the ankle after exercise; peak systolic velocities were measured with echo-doppler. Kinks were detected with echo-doppler and magnetic-resonance angiography. When functional kinking was diagnosed as the cause of the restriction, the athlete was offered surgery to release the iliac arteries, as part of our prospective study.FINDINGS:We recorded flow restrictions in the iliac arteries of 58 of 92 (63%) legs. In 40 of these legs (69%), kinks were the most important cause of the restriction, making these legs suitable for surgical release. We operated on 23 of 58 (40%) legs. All athletes who had an operation subjectively improved. Maximum workload in a cycling test and ankle pressure significantly improved after the operation. 20 (87%) athletes were able to successfully return to their desired high level of competition.INTERPRETATION:Our sports-specific protocol is effective in detecting kinking of the iliac arteries as a cause for flow restriction in athletes who have few intravascular abnormalities when investigated with conventional vascular diagnostic tools. Surgical treatment directed at the kinking was less invasive and therefore a better alternative to vascular reconstruction in these athletes.

Flow limitations in the iliac arteries of endurance athletes during exercise were previously ascribed solely to intravascular lesions. We postulate that functional kinking of the arteries can also result in flow limitations. However, the diagnostic tools in routine practice are not effective in diagnosing such flow limitations in a substantial proportion of athletes, mainly because these diagnostic tools do not measure in the provocative situations. Ninety-two symptomatic legs in 80 endurance athletes were examined with newly developed, sports-specific vascular tests. Thirty-five asymptomatic cyclists matched for working capacity served as the control subjects. Legs were classified as vascular or non-vascular following a decision algorithm, based upon the results of these diagnostic tests, excluding orthopaedic causes by the effects of specific treatment. Independently of this clinical classification, an alternative method was applied to find stable characteristics in the total patient group using factor analysis. This characterisation was based on scores on 14 test variables deriving from diagnostic tests that were not used in the decision algorithm, thus avoiding dependency between the clinical categorisation and the statistical categorisation. The hypothesis was that these characteristics were sufficiently sensitive to classify patients with vascular and non-vascular complaints. If so, these characteristics should correspond with the one derived from the decision algorithm. Following the decision algorithm, 58 legs (63%) were classified as vascular, 29 (32%) as non-vascular and 5 (5%) as inconclusive. The latter were considered non-vascular. in a Substantial proportion of the, vascular patients, kinking of the iliac arteries was identified as the major cause of flow limitation. The characteristics derived from factor analysis proved to classify 87% in agreement with the decision algorithm (kappa 0.56). The agreement is sufficient for validation of the clinical classification. The algorithm can therefore be applied in clinical situations to diagnose endurance athletes with flow limitations due to both intravascular lesions and kinking of the arteries.