Miniaturized near-infrared instruments in dairy products or dairy industry: First steps in a long-distance race?

Near-infrared spectroscopy using benchtop instrumentation is widely used in the analysis of dairy products or in the dairy industry. In this paper, we review the use of miniaturized near-infrared instrumentation in dairy products or in the dairy industry, highlighting some strengths and limitations of current devices.

The Entrainment Frequency of Cardiolocomotor Synchronization in Long-Distance Race Emerges Spontaneously at the Step Frequency

In forced conditions, where the heart rate and step frequency have been matched, cardiolocomotor synchronization (CLS) has been recognized. However, knowledge about the occurrence of CLS and its triggers in sports gesture in real contexts is little known. To address this gap, the current study tested the hypothesis that CLS in running spontaneous conditions would emerge at entrainment bands of muscle activation frequencies associated with a freely chosen step frequency. Sixteen male long-distance runners undertook treadmill assessments running ten three-minute bouts at different speeds (7, 7.5, 8, 9, 10, 11, 12, 13, 14, and 15 km⋅h–1). Electrocardiography and surface electromyography were recorded simultaneously. The center frequency was the mean of the frequency spectrum obtained by wavelet decomposition, while CLS magnitude was determined by the wavelet coherence coefficient (WCC) between the electrocardiography and center frequency signals. The strength of CLS affected the entrainment frequencies between cardiac and muscle systems, and for WCC values greater than 0.8, the point from which we consider the emerging CLS, the entrainment frequency was between 2.7 and 2.8 Hz. The CLS emerged at faster speeds (13–15 km⋅h–1) most prevalently but did not affect the muscle activation bands. Spontaneous CLS occurred at faster speeds predominantly, and the entrainment frequencies matched the locomotor task, with the entrainment bands of frequencies emerging around the step frequencies (2.7–2.8 Hz). These findings are compatible with the concept that interventions that determine optima conditions of CLS may potentiate the benefits of the cardiac and muscle systems synchronized in distance runners.

Bitter wins or a long-distance race? Social and political outcomes of the Spanish housing movement

This study investigates whether housing movements can produce significant outcomes. In particular, I examine the case of the Platform for People Affected by Mortgages (PAH), the main organization in the Spanish housing movement between 2009 and 2017. First, I discuss how their demands were framed according to specific contexts of legitimation. Second, I distinguish the nature and scope of the outcomes produced by this movement. My analysis uniquely combines a critical assessment of the PAH’s achievements with its unintended consequences and the significant social, political and economic contexts that help to explain its major outcomes. The global financial crisis, the convergence of the PAH with other anti-neoliberal movements and shifts among the dominant political parties determine the opportunities and constraints of the PAH’s development. Within this environment, the housing movement strategically operates by framing the culprits of the economic crisis in a new manner and by appealing to a broad social base beyond the impoverished mortgage holders. I also include the capacity of the movement’s organization to last, expand and increase its legitimacy as a relevant socio-political outcome. This is explained here through the articulation of the PAH’s agency (organizational form and protest repertoire) within the aforementioned contexts.

Life-threatening and major cardiac events during long-distance races: updates from the prospective RACE PARIS registry with a systematic review and meta-analysis

Aims Limited data exist regarding the incidence and aetiology of life-threatening events such as major cardiac events or exertional heat stroke during long-distance races. We aimed to provide an updated incidence, etiology and prognosis of life-threatening events during long-distance races. Methods The prospective RACE PARIS registry recorded all life-threatening events/fatal events occurring during 46 marathons, half-marathons and other long-distance races in the Paris area between 2006 and 2016, comprising 1,073,722 runners. Event characteristics were determined by review of medical records and interviews with survivors. Results The incidence of life-threatening events, exertional heat stroke and major cardiac events was 3.35 per 100,000, 1.02 per 100,000 and 2.33 per 100,000, respectively, including 18 sudden cardiac arrests (1.67 per 100,000). The main aetiology of sudden cardiac arrest was myocardial ischaemia (11/18), due to acute coronary thrombosis (6/11), stable atherosclerotic coronary artery disease (2/11), coronary dissection (1/11), anomalous connection (1/11) or myocardial bridging (1/11). A third of participants with ischaemia-related major cardiac events presented with pre-race clinical symptoms. Major cardiac events were more frequent in the case of a high pollution index (6.78 per 100,000 vs. 2.07 per 100,000, odds ratio 3.27, 95% confidence interval 1.12–9.54). Case fatality was low (0.19 per 100,000). Similarly, we report in a meta-analysis of eight long-distance race registries comprising 16,223,866 runners a low incidence of long-distance race-related sudden cardiac arrest (0.82 per 100,000) and fatality (0.39 per 100,000). Death following sudden cardiac arrest was strongly associated with initial asystole or pulseless rhythm. Conclusion Long-distance race-related life-threatening events remain rare although serious events. Better information for runners on the risk of pre-race clinical symptoms, outside air pollution and temperature may reduce their incidence.