Browsing by Author "Esteve Lanao, Jonathan"
Now showing 1 - 2 of 2
- Results Per Page
- Sort Options
Item Muscle Activation in Middle‐Distance Athletes with Compression Stockings.(Sensors, 2020) Moreno Pérez, Diego; Marín, Pedro J.; López Samanés, Álvaro; Cejuela, Roberto; Esteve Lanao, JonathanThe aim of this study was to evaluate changes in electromyographic activity with the use of gradual compression stockings (GCSs) on middle‐distance endurance athletes’ performance, based on surface electromyography measurement techniques. Sixteen well‐trained athletes were recruited (mean ± SD: age 33.4 ± 6.3 years, VO2max 63.7 ± 6.3 mL∙kg−1∙min−1, maximal aerobic speed 19.7 ± 1.5 km∙h). The athletes were divided into two groups and were assigned in a randomized order to their respective groups according to their experience with the use of GCSs. Initially, a maximum oxygen consumption (VO2max) test was performed to standardize the athletes’ running speeds for subsequent tests. Afterward, electromyographic activity, metabolic, and performance variables for each group were measured with surface electromyography. In addition, blood lactate concentration was measured, both with and without GCSs, during 10 min at 3% above VT2 (second ventilatory threshold), all of which were performed on the track. Next, surface electromyography activity was measured during a 1 km run at maximum speed. No significant changes were found in electromyography activity, metabolic and performance variables with GCSs use (p > 0.164) in any of the variables measured. Overall, there were no performance benefits when using compression garments against a control condition.Item Relationship between running economy and mechanical characteristics of triceps surae assessed with tensiomyography: A pilot study(Kinesiology, 2020) Moreno Pérez, Diego; López Samanés, Álvaro; Centeno, Aitor; Esteve Lanao, Jonathan; Diez Vega, IgnacioTensiomyography (TMG) is a non-invasive technique commonly used for evaluating muscle properties in highly trained athletes. The aim of our study was to evaluate the mechanical characteristics of m. triceps surae in competitive runners through TMG measurement and analyze if there was a relationship with running economy (RE). Nine male runners completed the study (mean±SD: age 40.4±9.0 years, body height 176.2±4.9 cm, body mass 70.7±9.4 kg, 10-km time 39.8±5.9 min, VO2peak 56.9 ± 6.5 mL kg-1 min-1). Each subject visited the lab on two occasions with 72h of rest between the trials. On the first day, an incremental test was performed to determine their ventilatory thresholds and peak oxygen consumption. On the second day, RE was evaluated on a treadmill at the velocity of their first ventilatory threshold (VT1), and mechanical characteristics of the soleus and gastrocnemius muscles were analyzed with TMG. Significant differences were found between the economic and non-economic runners in m. soleus in delayed time (Td), contraction time (Tc), and maximal radial displacement of the muscle belly (Dm). Also, significant differences were found in contraction time (Tc) in medium calf (MC) and in half relaxation time (Tr) in lateral twin (LT). The main finding of our study was that the runners with better RE showed greater stiffness in the triceps surae muscles, an aspect that seems to be associated with better performance in athlete runners.