Ronald V. Croce

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Reliability and concurrent validity of the Movement Assessment Battery for Children were evaluated with a sample of 106 boys and girls, distributed into four age groups: 5-6 yr. (n = 20), 7-8 yr. (n = 20), 9-10 yr. (n = 46), and 11-12 yr. (n = 20). Test-retest reliability of the Movement Assessment Battery for Children, estimated using intraclass(More)
The purpose of this investigation was to determine differences between pre- and post-pubescent males and females in quadriceps (vastus medialis; VM) and hamstrings (medial hamstrings and biceps femoris; HAMS) muscular activation patterns via the root mean square of surface electromyography (SEMG) during self-initiated vertical jump landing. Fifty-eight(More)
Individuals with vision loss are at an increased risk of falls. Understanding what factors contribute to postural instability within this population is a necessary step towards the development of physiotherapeutic programs targeted at reduction of falls within this population. Forty-six age-matched participants were evaluated with the sensory organization(More)
PURPOSE This study determined anteroposterior knee-joint muscle activation differences among children and adult males and females landing from a self-initiated vertical jump (VJ) under normal and offset-target conditions to further understand physical maturation's influence on anterior cruciate ligament (ACL) injury risk. METHODS Fifty-five recreationally(More)
The objective of this study was to compare reaction time, joint torque, rate of torque development, and magnitude of neuromuscular activation of lower-extremity muscles in elderly female fallers and nonfallers. Participants included 11, elderly, female fallers (71.3+/-5.4 years) and twelve nonfallers (71.3+/-6.2 years) who completed a fall risk(More)
The effect of velocity and movement pattern (reciprocal vs. non-reciprocal) on the reciprocal co-activation of the hamstrings was investigated through analysis of the root mean square (RMS) and the median frequency (MDF) of surface electromyography (SEMG). Fourteen subjects performed six continuous repetitions of a reciprocal isokinetic movement pattern(More)
This study investigated the effectiveness of electromyographic (EMG) biofeedback in maximizing strength gains and integrated electromyographic (IEMG) levels of the quadriceps muscle group resulting from an isokinetic exercise program. Twenty-one male volunteers recruited from physical education classes at a large southwestern university were randomly(More)
OBJECTIVE To compare isokinetic hamstring and quadriceps peak torque (Nm), average power (watts), and corresponding hamstring/quadriceps (HQ) ratios (as percentages) of adult men with Down syndrome(DS), with mental retardation without Down syndrome (NDS), and nondisabled sedentary controls (SC). DESIGN Repeated measures analysis of variance. SETTING(More)
OBJECTIVE To examine the effect of leg rotation on the vastus medialis oblique/vastus lateralis (VMO/VL) electromyogram (EMG) activity ratio during two closed chain knee extension exercises prescribed for patellofemoral pain syndrome (PFPS). DESIGN AND SETTING Subjects performed step-up/step-down (SUSD) and modified wall-slide (MWS), exercises with the(More)
The variability of walking gait timing increases with age and is strongly related to fall risk. The purpose of the study was to examine the interaction of age, cognitive function, and gait performance during dual-task walking. Forty-two, healthy men and women, 50–80 years old, completed the Mini-Mental State Exam (MMSE) and Trail Making Test (TMT) to assess(More)