Search results for "Jump"

Children’s physical activity and sedentary time compared using assessments of accelerometry counts and muscle activity level

2018

Background This research compared accelerometry (ACC)-derived and muscle electromyography (EMG)-based estimates of physical activity (PA) and sedentary time in typical PA tasks and during the daily lives of children. Methods Data was included from two exploratory studies. In Study I, 6–7-year-old children (n = 11, 64% girls) were assessed for eight PA tasks (walking, stair negotiation, climbing, crawling, swinging, balancing, trampoline jumping and a game of tag). In Study II, 7–9-year-old children (n = 14, 38% girls) were assessed for six PA tasks (walking, sitting, static squat, single leg hops, jump for height and standing long jump), and daily PA during one day with and one day without…

Effects of Combined Strength and Endurance Training on Body Composition, Physical Fitness, and Serum Hormones During a 6-Month Crisis Management Oper…

2020

Pihlainen, K, Kyröläinen, H, Santtila, M, Ojanen, T, Raitanen, J, and Häkkinen, K. Effects of combined strength and endurance training on body composition, physical fitness, and serum hormones during a 6-month crisis management operation. J Strength Cond Res XX(X): 000-000, 2020-Very few studies have examined the impact of training interventions on soldier readiness during an international military operation. Therefore, the present study investigated the effects of combined strength and endurance training on body composition, physical performance, and hormonal status during a 6-month international military deployment consisting of typical peacekeeping tasks, e.g., patrolling, observation, a…

EMG activities and plantar pressures during ski jumping take-off on three different sized hills

2001

Different profiles of ski jumping hills have been assumed to make the initiation of take-off difficult especially when moving from one hill to another. Neuromuscular adaptation of ski jumpers to the different jumping hills was examined by measuring muscle activation and plantar pressure of the primary take-off muscles on three different sized hills. Two young ski jumpers volunteered as subjects and they performed several trials from each hill (K-35 m, K-65 m and K-90 m) with the same electromyographic (EMG) electrode and insole pressure transducer set-up. The results showed that the differences in plantar pressure and EMGs between the jumping hills were smaller than expected for both jumper…

Muscle plasticity after weight and combined (weight + jump) training.

2004

The purpose of this study was to compare the effects of jump training as a complement to weight training on jump performance and muscle strategy during the squat and countermovement jump.Twenty-two male handball players, between the ages of 17 and 24, and in good health, were randomly divided into three groups. Two were trained groups, weight training (WTG) and jump training combined with weight training (CTG), and one was a control group (CG). Maximal isometric force and maximal concentric power were assessed by a supine leg press, squat jump (SJ), counter movement jump (CMJ), and surface EMG was used to determine changes in muscle adaptation before and after the training period.After 6-wk…

Digitālo rīku efektivitāte personīgo finanšu pārvaldīšanā

2018

Bakalaura darbā “Digitālo rīku efektivitāte personīgo finanšu pārvaldīšanā” pētīta digitālo rīku izmantošanas efektivitāte personīgo finanšu pārvaldīšanā un studentu finanšpratības līmenis. Pētījuma mērķis ir noteikt, vai digitālie rīki var kalpot par efektīvu instrumentu, ar kuru palīdzību iespējams īstenot personīgo finanšu pārvaldīšanas procesu. Lai sasniegtu izvirzīto mērķi, bakalaura darbā izmantotas kvantitatīvas un kvalitatīvas pētniecības metodes – anketēšana, daļēji strukturētā intervija, dienasgrāmatas metode un kvalitatīvā kontentanalīze. Iegūtie dati analizēti un interpretēti, balstoties uz pragmatisma metateoriju un teorētisko modeli ELIS. Rezultāti parāda, ka digitālie rīki sn…

Programma zīmēšanas praksei

2019

Šī kvalifikācijas darba gaitā es izstrādāju lietojumprogrammu “Sketch Practice” Android operētājsistēmai. Lietojumprogramma ir paredzēta cilvēkiem, kuri grib pilnveidot un attīstīt savas zīmēšanas prasmes, pārzīmējot dažādu objektu bildes, kad tas parādas ekrānā uz ierobēžoto laika brīdi.

Minivolley and motor skills: an exeperimental study

2008

Modeling muscle mechanics of arm and leg movement : a new approach to Hill's equation

2015

Leg and joint stiffness in human hopping

2010

The present study investigated the regulation of leg and joint stiffness in hopping at different intensity levels. Eight male subjects performed bilateral hopping at various intensity levels that were determined by peak vertical ground reaction force (GRF). In addition to the GRF, the measurements included hopping kinematics and electromyography (EMG) of selected leg muscles. While the leg and ankle joint stiffness remained invariant, the knee joint stiffness increased significantly (P<0.01) with the hopping intensity. EMG analysis revealed a significant increase in averaged EMG for all the measured muscles before and during the early phase of ground contact (P<0.05-0.001) with increasing h…

Comparison between the directly measured achilles tendon force and the tendon force calculated from the ankle joint moment during vertical jumps.

1988

Summary The purpose of this study was to compare the relationship between the achilles tendon force and the tendon force estimated from the ankle joint moment (EATF) during vertical jump. A healthy male subject performed the following jumps on the force platform: (a) maximal vertical jump from a squat position without counter-movement; (b) maximal vertical jump from an erect standing position with a preliminary counter-movement; (c) repetitive submaximal hopping on the spot with preferred frequency. The achilles tendon force was measured directly with an implanted tendon transducer in all jumping conditions. In addition the joint moment obtained from the film and ground reaction force was u…