Lina Majed

Qatar University, Doha, Qatar · Physical Education Department

Walking speed (WS) is considered an important indicator for overall health. Despite this, there is a paucity of data relating to WS values in the Arab region. The present study aims to establish preferred (PWS) and maximal walking speeds (MWS) in young adults in Qatar and examine how gender, body mass index, and physical activity (PA) components in...

This second edition of Qatar National Physical Activity Guidelines is written as a practical guideline reference and not necessarily as a scientific resource. It outlines the most updated knowledge and best practices regarding physical activity as it relates to health. The intention of this content is to be an immediate and easy resource of informa...

We examined the relationships between body fat (BF) and field measures of physical fitness in adolescent handball players. Twenty nine players (age: 16.6 ± 1.72 years; body mass: 79.8 ± 17.0 kg; height: 1.70 ± 0.12 m; body fat: 27.7 ± 8.67%) from Qatar handball first league performed a series of anthropometric and fitness tests related to their per...

Preferred walking speed (PWS) is considered a robust measure for assessing mobility and overall health. Healthy reference data are unavailable for Qatar. The aim of this study was to investigate PWS and underlying gait parameters around PWS among healthy young adults living in Qatar. PWS was assessed for 18 Qataris (9 females) and 16 non-Qatari Ara...

Poor glycaemic control is associated with chronic life-threatening complications. This cross-sectional study examined whether there is an association between handgrip strength and glycaemic control among patients with diabetes. Data on 1058 participants aged 40 and older were collected from the National Health and Nutritional Examination Survey (NH...

Background Physical inactivity is high within the Qatari population, particularly within females, and school-based environments, contributing to increased morbidity and mortality. School-based physical activity (PA) outcomes may be mediated by physical self-concept. Low physical self-concept may negatively impact PA engagement, compromising childho...

Background: Evidence on physical activity (PA) indicators for children and youth at a national level is necessary to improve multilevel support for PA behaviors. Lebanon's first Physical Activity Report Card for children and youth (2018) aimed to fill this gap. Methods: In line with the recommended methods of "Global Matrix 3.0," nationally represe...

This study investigated the mechanical efficiency (ME) and associated factors in obese, overweight, and normal-weight adolescent boys during incremental cycle exercise test to exhaustion. Forty-five sedentary adolescent boys (13-14 years old) were separated in three groups according to the percentage of fat mass as follows: 15 normal-weight (NW) (b...

Several studies have investigated the influence of perceiving colors on affective outcomes and/or performance. However, the effects of seeing colors on self-selected behaviors have received little attention from physiologists and psychologists. Therefore, the present study aimed at examining whether exposure to green and red environments could infl...

The present study aims 1) to evaluate ratings of perceived exertion (RPE) and corresponding intensities during a maximal graded cycling test and 2) to determine the effects of 6 weeks of supramaximal cycling exercise (SCE) intervention on RPE and associated physiological factors in young and older sedentary groups. Two healthy groups of seventeen y...

Methods: Sixteen professional soccer players took part in the study (age: 24.1±0.9 years). Testing of players was conducted on separate days in a randomized and counter-balanced order (each training session: 28-min: 4x4 minutes work with 3-min of passive recovery in-between). Effort: HIIT: intermittent 15-s runs at 110% maximal aerobic speed with...

The present study aimed to compare various entropy measures to assess the dynamics and complexity of center of pressure (COP) displacements. Perturbing balance tests are often used in healthy subjects to imitate either pathological conditions or to test the sensitivity of postural analysis techniques. Eleven healthy adult subjects were asked to sta...

Combining advances from gait analysis and motor learning fields, this study aims to examine invariant characteristics and practice-related changes in the control of walking gait when learning a biomechanically constrained pattern, racewalking (RW). RW’s regulation imposes a straightened knee at the stance phase which differentiates it qualitatively...

Gait patterns have been widely studied in different fields of science for their particular characteristics. A dynamic approach of human locomotion considers walking and running as two stable behaviors adopted spontaneously under certain levels and natures of constraints. When no constraints are imposed, people naturally prefer to walk at the typica...

Background and Objectives Walking is the most natural and important activity of daily living as it refers to the primary type of terrestrial human locomotion. Analyses of gait patterns typically examine the speed and manner in which people prefer to walk. Even though humans can walk at speeds ranging from near 0 km/h to 9 km/h, they typically only...

Body image is a psychological construct which refers to self-concept including self-image and feelings an individual perceives regarding his or her body. Several studies have examined how women subjectively perceive their bodies in Western cultures compared to objective measures. However, limited studies have examined this relationship among women...

Rising obesity levels and physical inactivity are major concerns in the 21st century due to the their association with several health risks including diabetes, cardiovascular disease and cancer. Engaging sedentary and obese population in a variety of exercise and physical activity patterns is a well-established approach, but it is often hindered by...

Notes: Exercise prevention of health risks: Lessons from the sport science field and potential applications in Qatar R ising obesity levels and physical inactivity are major concerns in the 21st century due to their association with several health risks including diabetes, cardiovascular disease and cancer. Engaging sedentary and obese population i...

Peforming racewalking requires learning new coordinative patterns involving a large number of biomechanical degrees of freedom (dof). Many studies investigated the existence of common strategies in the dof organization with motor learning (e.g., freezing/freeing). However, contradictory results indicated that learning dynamics mainly depends on the...

Background and Purpose: Restoring function in individuals who have severe paralysis of the upper extremity secondary to stroke is challenging. Recent technologies have made it possible to use robotic devices as novel tools for assisting the therapists to provide safe and intensive rehabilitation with repeated motions. However, most of the training...

The first aim of the present work was to investigate movement reorganization with learning a complex motor skill, racewalking. The second aim was to bring more insight into the role of metabolic factors and perceived exertion. To do so, the first two studies analyzed the evolution of a large number of kinematic variables when participants underwent...

This study investigated how novices learn an energy demanding and biomechanically constrained task like racewalking. The first aim was to examine if movement reorganizes according to some fundamental strategies, proceeding in different stages (Newell, 1985). The second aim was to investigate the link between movement reorganization, metabolic effic...