Crossfit

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.

This study examines the effects of an 8-week CrossFit-based concurrent training program in boys and girls aged 7 to 11 years, comparing an experimental group (n=15) with a control group (n=15). The aim is to assess changes in strength, cardiorespiratory fitness, body composition, and psychological variables such as anxiety, stress, and self-esteem, using field-based physical tests (CMJ, Course Navette, handgrip strength, etc.) and validated questionnaires. The study follows a randomized controlled trial design with pre- and post-intervention assessments. The experimental group will complete two weekly CrossFit sessions adapted for children, while the control group will maintain their usual routine without structured physical training. The hypothesis states that the intervention will significantly improve both physical performance and psychological well-being in the experimental group compared to the control group.