The Effect of Volitional Preemptive Abdominal Contraction on Biomechanical Measures During A Front Versus Back Loaded Barbell Squat.

Background: Weightlifting is growing in popularity among recreational and competitive athletes. The barbell back squat (BackS) is commonly included in these training programs, while the barbell front squat (FrontS) is commonly performed as a component of other lifts such as the power clean or clean and jerk, it is less commonly practiced in isolation.

Hypothesis/purpose: The purpose of this study was to examine the effects of VPAC performance on trunk muscle and LE biomechanical responses during loaded BackS versus FrontS in healthy subjects.

The effect of forearm position on elbow flexion strength in nursing, occupational, and physical therapy students.

Background: Novice nurses, occupational and physical therapist's injury rates are alarming.

Objective: To test for differences in peak elbow flexion forces (PEFF) by profession using different forearm positions.

Methods: Entry-level RN, OT, and PT students performed 3-repetitions of standing PEFF in forearm supination, pronation, and neutral.

Effect of overground locomotor training on ventilatory kinetics and rate of perceived exertion in persons with cervical motor-incomplete spinal cord injury.

Study Design: Pre-post, pilot study.

Objectives: To characterize ventilatory () responses to exercise following warm-up walking in individuals with chronic incomplete spinal cord injury (iSCI) during constant work rate (CWR) exercise. Secondarily, to investigate and tidal volume () variability, and ratings of perceived exertion (RPE) before and after overground locomotor training (OLT).

The Effects of Forced Exhalation and Inhalation, Grunting, and Valsalva Maneuver on Forehand Force in Collegiate Tennis Players.

To examine the effects of forced expiration (FE), forced inspiration (FI), grunting (GR), and valsalva maneuver (VM), on air volume, maximum force production, and muscle recruitment during a simulated forehand stroke in collegiate tennis players. Superficial electrodes were placed over the anterior deltoid, pectoralis major, rectus abdominis, lumbar and thoracic erector spinae, and external and internal obliques. Subjects stood in a simulated forehand stroke stance with their dominant hand positioned on a force plate.

The effects of "grunting" on serve and forehand velocities in collegiate tennis players.

The aim of this study was to examine the effects of grunting on velocity and force production during dynamic and static tennis strokes in collegiate tennis players. Thirty-two (16 male and 16 female) division II and III collegiate tennis athletes with a mean age of 20.2 ± 1.

Regression analysis for prediction: understanding the process.

Research related to cardiorespiratory fitness often uses regression analysis in order to predict cardiorespiratory status or future outcomes. Reading these studies can be tedious and difficult unless the reader has a thorough understanding of the processes used in the analysis. This feature seeks to "simplify" the process of regression analysis for prediction in order to help readers understand this type of study more easily.

Grip strength of Texas Special Olympians.

Little is known about the physical fitness parameters of individuals who participate in the Special Olympics. The purpose of this study was to assess the grip strength of 104 Special Olympians participating in the winter Olympic Games. Men were significantly stronger than women across age groups 20 to 59 yr.

Isometric strength and dynamic back extensor endurance are unrelated in children ages 6-10 years: a pilot study.

This study assessed the correlation between back extensor isometric force and dynamic endurance in 69 children 6-10 years of age. Subjects were positioned prone with legs and hips supported and restrained on two folded 6-in. mats.

Mismatch of school desks and chairs by ethnicity and grade level in middle school.

Objective: The purpose of this study was to compare anthropometric measurements of children/adolescent (6th grade - 8th grade) and use these measurements to determine fit by ethnicity and grade level across three common classroom desks and chairs.

Study Design: Eighty-eight Caucasian-American (CA), 65 Mexican-American (MA), and 58 African-American (AA) 6th, 7th, and 8th graders participated in the study (n = 211 students). Students were seated (shoeless) on a horizontal seating surface with an adjustable footrest to obtain 90 degrees angles at the hips, knees, and ankles.

Wheelchair coasting downhill is a reliable work task.

OBJECTIVE: To measure test-retest reliability of physiological responses during submaximal wheelchair downhill and horizontal treadmill ergometry. DESIGN: A test-retest design was used on a convenience sample. Four male and three female non-wheelchair users, (22-43 years of age) propelled or coasted in a wheelchair under steady-state conditions.