Clinical trials

This randomized controlled blinded clinical trial aims to evaluate the effect of ultrasound-guided percutaneous neuromodulation (US-guided PNM) targeting the innervation of the transversus abdominis muscle on squat performance in CrossFit practitioners. The transversus abdominis is a deep trunk muscle that contributes to lumbopelvic stability and force transmission during functional and athletic movements. Previous research suggests that improving neuromuscular activation of the trunk musculature may enhance movement efficiency and performance during resistance exercises. Ultrasound-guided percutaneous neuromodulation is a minimally invasive technique that applies electrical stimulation through a needle placed close to a peripheral nerve under ultrasound guidance, with the aim of modulating neuromuscular function. Healthy male and female CrossFit practitioners aged 18 to 60 years, with at least one year of training experience, will participate in the study. Participants will undergo an initial ultrasound assessment of transversus abdominis activation to classify and distribute the sample into groups. In a second session, mean velocity, mean propulsive velocity, and velocity loss during squat performance will be assessed using a linear velocity transducer. Participants will perform 3 sets of 2 repetitions of the squat exercise at 80% of their one-repetition maximum (1RM). Following baseline assessment, participants will be randomly assigned to either an experimental group receiving ultrasound-guided percutaneous neuromodulation of the iliohypogastric and ilioinguinal nerves, or a sham group receiving needle insertion without electrical stimulation. The intervention will consist of a TENS-type current applied at 10 Hz for 10 cycles of 10 seconds. Squat performance variables will be reassessed immediately after the intervention. The purpose of this study is to determine whether US-guided percutaneous neuromodulation can acutely improve squat performance in trained CrossFit practitioners. The study hypothesis is that participants receiving active neuromodulation will demonstrate greater improvements in squat execution velocity and lower velocity loss compared with participants receiving the sham intervention.

Older adults have psychological strengths that promote psychological well-being and reduce distress (depression or anxiety) and loneliness, enhancing their quality of life (QoL). These strengths can play a key role in a psychological intervention programme to promote QoL. Ageing and stress may increase the likelihood of illness in older people. When social policies and values, such as ageism and age-based discrimination, are added to this, older people are perceived as one of the most vulnerable groups in the population. The novelty of the study focuses on the paradigm shift regarding ageing, from the traditional model of decline associated with older people, in which ageing is associated with illness, functional decline and dependence, to a more positive view focused on personal strengths to cope with adversity, and how this relates to psychological well-being, emotional distress and QoL. The first and main reason for conducting this research is the scarcity of studies based on the model of strengths or gains in relation to ageing. Therefore, the relevance of this study lies, on the one hand, in offering a change of perspective on old age, from a negative view (illness or vulnerability) to an approach based on strengths, and on the other hand, in gaining a deeper understanding of the strengths of older people, the associated factors and the role they play in cushioning adversity, such as in the COVID-19 pandemic. Most older people remain healthy, independent and enjoy high levels of well-being and QoL, with factors such as resilience cushioning the consequences of stress and ageing. In this vein, it has been shown that age strengthens the ability to distance oneself from stressful situations and re-evaluate them positively, and older people report greater emotional well-being compared to younger adults. Furthermore, it is well known that having good social support seems to have long-term health benefits. Some recent studies related to the pandemic show that older people, despite being the most threatened by the situation, had lower levels of anxiety and depression compared to younger people, contrary to expectations. Furthermore, coping strategies, such as resilience and social support, are mediating factors in the well-being of older people exposed to COVID-19. Psychology, and psychogerontology in particular, is responsible for designing interventions aimed at increasing the likelihood of successful ageing. In fact, managing emotions is essential for people's health, well-being and QoL. In this sense, the emergence of positive psychology represents a change in therapeutic and rehabilitation processes. This psychological trend leaves behind a model based mainly on negative aspects and loss, in order to enhance human qualities that can act as buffers against adversity. In this way, a shift in focus is established, suggesting that in addition to trying to alleviate pathological aspects, it is equally important to find people's qualities or virtues in order to achieve greater QoL. COVID-19 has led to older people being portrayed as a homogeneous group, even though increased life expectancy means that this is the longest stage of life, with studies reflecting the great diversity of older people. They are repeatedly portrayed as vulnerable, with messages that convey paternalism ('our elders') and overprotection, despite scientific literature indicating that this can have serious consequences. Throughout their lives, older people have had to face adversity, which they have been able to overcome or accept thanks to psychological strengths such as resilience, acceptance and gratitude, among others.