Inese Pontaga- MD, PhD
- Professor (Full) at Riga Stradiņš University
Inese Pontaga
- MD, PhD
- Professor (Full) at Riga Stradiņš University
Investigation of strength endurance, power and balance characteristics in adolescent football (soccer) players.
About
43
Publications
27,226
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267
Citations
Introduction
Research interests. Evaluation of musculoskeletal system adaptation to sports training in athletes trained in different sports. Sports overuse injuries prevention. Proprioception. Fatigue.
Methods. Anthropometry methods. Dynamometrry. Jump tests on contact mat or force platform. Workload measurement on ergometers.
I am working together with my bachelour and master students.
Started collaboration with colleagues from Department of Anatomy of Riga Stradins University.
Current institution
Additional affiliations
September 1998 - present
Position
- Professor (Full)
Description
- Normal Physiology Developmental Physiology Sports Physiology
January 2016 - March 2016
Position
- Professor (Full)
Description
- I have to deliver 4-5 lectures every working day and have 3 master students who must finist their work this spring. Research I am doing only in weekends in my free time and without any financial support.
Education
September 1983 - June 1989
Riga Stradins University (rLatvian Medical Academy)
Field of study
- Clinical Medicine
Publications
Publications (43)
To determine an ankle inversion-eversion movement range part where evertor/invertor muscles torque ratio is altered after recurrent ankle lateral ligament sprains.
The ankle evertor/invertor muscles torque ratios were determined in the different range parts of angular positions by the muscle isokinetic movements.
It is important to determine the mo...
The aim of our investigation was to determine the ratio of maximal torque values and the torques in the certain positions of range of movements (ROM) between hamstring (H) and quadriceps femoris (Q) muscles at medium and high velocity of movement in concentric (CC) and eccentric (ECC) action of hamstring muscles. The knee muscles of 15 amateur fema...
Background and Study Aim. Changed thigh muscles action balance can cause sports injuries. The aim of our investigation was the knowledge about effect of thigh muscles fatigue resistance on the knee flexor (Fl)/ extensor (Ext) muscles mean work (W) and power (P) ratio.
Material and Methods. Fourteen amateur male handball players participated The tes...
Promoting a high level of strength, power, and postural control in specific playing positions is crucial throughout the puberty phase in young football players. This study explored peak power, lower limb explosive strength, and balance performance among youth football players across their playing positions. Forty-three young male football players (...
Background: The resistance exercises underpin the strength and power development of muscle activation in adolescent footballers. Objective: The study purposed to review the effectiveness of different resistance exercise models on improving anaerobic and balance characteristics among young football players. Methods: A systematic search of Scopus, SP...
Purpose
Balance allows multidirectional lower limb movements that improve technical football skills and reduce injury caused by match activities. This study aimed to evaluate the static and dynamic balance of preferred and nonpreferred legs during unipedal stance in young footballers and investigate correlations between the two types of balance acr...
Background and purpose. Many regularly performed spikes and serves lead to a shoulder girdle adaptation that could be sport-specific and result in traumatic events. The aim was to evaluate shoulder joints' range of movements (ROM), peak isometric strength of arm muscles, submaximal force repetition error, and upper body dynamic stability in adolesc...
Static balance and dynamic balance are crucial to an athlete's motor skills and are pivotal determinants of performance in team sports (TS) players. Training to enhance balance prevents falls and reduces the incidence of sports-related injuries. However, the existing literature presents conflicting data regarding the impact of an athlete's sex on b...
The purpose was to evaluate the training program, body mass composition, aerobic performance laboratory and field test results, blood hormone concentration in elite junior female roller skier in successful competition season. Methods. Totally 206 training sessions (278 training hours) were analysed during six months (from April till September). Ath...
Purpose
The aim of our study was to evaluate shoulder joint flexibility, shoulder muscle peak isometric force, and submaximal force differentiation ability after warm-up exercises, as well as to compare the peak isometric force and submaximal force differentiation ability before and after a 4.5-km free-style swimming trial in swimmers and triathlet...
A large body size and mass are advantages in rugby. The desire to gain weight can bring players to become overweight or obese. This can worsen their thermoregulation and health risks. The aim was to evaluate anthropometric characteristics and to determine the effect of additional body fat percentage on sweat loss during play-match in male rugby pla...
A large body size and mass are advantages in rugby. The desire to gain weight can bring players to become overweight or obese. This can worsen their thermoregulation and health risks. The aim was to evaluate anthropometric characteristics and to determine the effect of additional body fat percentage on sweat loss during play-match in male rugby pla...
Objective. To determine an ankle inversion - eversion movement range part where evertor/invertor muscles torque ratio is altered after recurrent ankle lateral ligament sprains.
Design. The ankle evertor/invertor muscles torque ratios were determined in the different range parts of angular positions by the muscle isokinetic movements.
Background. It...
Background: Fatigue could worsen shoulder cuff rotator balance if fatigue of the external rotation (ER) could appear faster in comparison with the internal rotation (IR). The shoulder rotation peak torques (τmax) side-asymmetry and muscle endurance effect on the mean work (W), mean power (P) and their ratio of ER/IR in handball players was investig...
A large body size and mass are advantages in rugby. The desire to gain weight can bring players to become overweight or obese. This can worsen their thermoregulation and health risks. The aim was to evaluate anthropometric characteristics and to determine the effect of additional body fat percentage on sweat loss during play-match in male rugby pla...
Background and Objectives: Only a few studies have reported the pre-practice hydration status in soccer players (SPs) who train in a cool climate. The primary purpose of this study was to examine the hydration status of male semiprofessional SPs immediately before their regular training session in winter. The secondary purpose was to compare the ur...
The purpose of our investigation was to determine the most informative physiological characteristics to monitor training effect in highly qualified road cyclists.Fourteen Latvian Olympic Team road cyclists with training experience from seven to nine years participated in theinvestigation voluntarily (their average age was 19.3 ± 1.1 years, height —...
Background: Fatigue could worsen shoulder cuff rotator balance if fatigue of the external rotation (ER) could appear faster in comparison with the internal rotation (IR). The shoulder rotation peak torques (τmax) side-asymmetry and muscle endurance effect on the mean work (W), mean power (P) and their ratio of ER/IR in handball players was investig...
The aim of our investigation was to compare qualified basketball and handball players’ anthropometric and performance (aerobic and anaerobic endurance, explosive power) characteristics. Male handball and basketball players from Premium league teams voluntary participated. The aerobic endurance was measured on a treadmill, the intensity of running i...
Background and Study Aim. The impact of natural alternation of seasons on hydration status in athletes is not known, but it is a factor influencing efficiency of the training. The aim of our investigation was to compare pre- and post- training body hydration status, a body mass (BM) changes and sweating rate in male rugby seven players in early spr...
Abstract
The aim of our investigation was to determine and compare the pre- and post- training body hydration status in professional and amateur male ice hockey players consumed the drinks according to their thirst sensation in winter conditions. Materials and methods: 11 amateur and 23 professional ice hockey players participated in the investigat...
Background.
Pre-training hydration status is considered a factor influencing efficacy of training. Research
literature does not contain data regarding the potential impact of natural alternation of seasons on pre-training
hydration status in athletes. The purpose of this study was to assess and compare pre-training hydration status in
well-trai...
The aim of the investigation was to:
1) compare shoulder external/internal rotator muscles' peak torques and average power values and their ratios in the dominant and non-dominant arm; 2) determine correlations between shoulder rotator muscles' peak torques, average power and ball-throwing speed in handball players. Fourteen 14 to 15-year-old male...
The aim of the investigation is to prove that an increased body mass index (BMI) in soccer players does not always give evidence about overweight or obesity, but may appear due to skeletal muscles hypertrophy, which does not influence the players’ power characteristics. Twenty nine male high qualified soccer players participated voluntary in the in...
Aim. The aim of our investigation is to determine the hamstring/ quadriceps femoris (H/Q) muscles torque ratios in the concentric/ concentric (C/C) and eccentric/ concentric (E/C) contractions in different angular positions of the knee range of movements (ROM). Methods. Fifteen female and 13 male athletes participated in the investigation. The musc...
The hamstrings/ quadriceps femoris muscles torques ratios in full range of the knee joint movements (ROM) are not investigated. These ratios in the extreme positions of the ROM must be more informative in the joint stability estimation because in these positions a joint injury can occur more probable.
An aim of our investigation is to determine th...
The shoulder joint is prone to dislocation due to poor fit, great range of movement (ROM) and weak supporting muscles. The most important muscle group providing joint stability is the rotator cuff group. The aim of our investigation was to determine the shoulder rotator cuff muscle strength and balance specific to handball players. The shoulder joi...
Balance of the muscles in the joint is determined as the ratio of torques between the agonists and antagonists. Deficiency in one muscle group may lead to an imbalanced action in that joint and cause musculoskeletal injuries. The aim of the investigation was to determine the ratio of torque values between hip and knee joints flexors and extensors i...
Eleven male sportsmen at the age of 24.3 4.5 were examined. Their hip joint flexors and extensors were tested by an REV-9000 Technogym dynamometer system during isokinetic movements at angular velocities of 100 (low) and 200 (high) /s. The range of hip joint movements was from 30 (in flexion) to 130 (in extension). Torque values and their ratios fo...
The effect of sports training or lack of physical activity on the properties of bone tissue is investigated. People with normal physical activity, sportsmen, and hypodynamic persons are tested. Ultrasound as a safe and noninvasive method is used. In normal activity and after short-time sports training or bed rest, the maximum ultrasound velocity is...
Model composite media − 10×15×80 mm3 bone tissue phantoms based on an epoxy resin with fillers—were made to study the influence of porosity and mineral content
on ultrasound velocity and attenuation. The pores were simulated by ∼ 1 mm3 particles of a soft rubber, while the mineral content was imitated by a mineral residue of natural bone obtained b...
Measurement of the velocity of propagation and attenuation of ultrasound (200 kHz) is believed to be a useful non-invasive technique for assessing the mechanical properties of bone. A new method for the determination of ultrasound velocity and attenuation of longitudinal waves in cortical bone was used in vivo and in situ on intact and fractured hu...
The ultrasound propagation velocity was measured in the medial surface of tibial bone of 58 children's shins, ages 3 to 16
years. The children had uninterrupted bed rest from 1 to 52 months because of osteochondropathies of femoral head. The average
ultrasound velocity in tibia decreased with the term of hypodynamia, due to diminishing of the amoun...
The penetration strength of trabecular bone tissue of human lumbar vertebrae was determined in vitro by the osteopenetrometer. The tests were performed in the frontal, middle, and back third of the vertebra body lateral side, in the upper and lower terminal plates, and in the processus spinosus in three vertebrae of the age group 1 (19–25 years), f...
The stiffness of sciera,chochoroid, lens and lens nucleus is increasing,but of lens capsule- decreasing with age influencing the vision. Rised IOP increases the eye tissue rigidity even for young people. The tissue stiffness changes together with fall of maximal accommodation stimulate origin and development of myopia for children and presbyopia fo...
Just after the tibial bone fracture the ultrasound velocity in fracture site significantly decreased. During the normal consolidation in the first 20 weeks after fracture the velocity quickly increased in the fracture site and near it,further the velocity changes were very slowly. For the non-union the velocity after the first 100 weeks in the frac...
The contra-sounding principle is realized to improve the measurents of ultrasound velocity and attenuation in human bone.The velocity is independent from the test base length, recording the signals with respect to their arrival. The coefficients of variation of the velocity and attenuation for the bone specimens are 0.47 and 7.3%, for the tibia in...
Ultrasound velocity value and its distribution in the sportsmen's tibia are determined in vivo using the special automatic scanning system. The device allows one to measure the velocity in 90 points of the anterio-internal part of tibia. All kinds of sport increase the average ultrasound velocity and the mineral content in comparison with the norm,...
The aim of our investigation is to prove that an increased body mass index (BMI) in football and handball players does not always give evidence about overweight or obesity, but may appear due to skeletal muscles hypertrophy, and that higher body mass index does not influence the vertical jump height in athletes. 29 male football players and 20 hand...
