Medicine and science in sports and exercise
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Med Sci Sports Exerc · Jul 2008
Randomized Controlled TrialEffects of acute salbutamol inhalation on quadriceps force and fatigability.
Oral beta2-agonist administration improves muscle function in persons without asthma. We performed a double-blind, randomized, controlled crossover study to assess whether acute inhaled salbutamol administration improves muscle strength and fatigability in healthy moderately trained subjects. ⋯ Acute therapeutic or supratherapeutic doses of inhaled salbutamol have no effect on quadriceps strength, fatigue, and recovery in men without asthma.
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Med Sci Sports Exerc · Jul 2008
Randomized Controlled TrialExercise attenuates the weight-loss-induced reduction in muscle mass in frail obese older adults.
To evaluate the effect of adding exercise to a hypocaloric diet on changes in appendicular lean mass and strength in frail obese older adults undergoing voluntary weight loss. ⋯ Exercise added to diet reduces muscle mass loss during voluntary weight loss and increases muscle strength in frail obese older adults. Regular exercise that incorporates PRT should be used to attenuate muscle mass loss in frail obese older adults on weight-loss therapy.
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Med Sci Sports Exerc · Jun 2008
Dose-response relation between physical activity and blood pressure in youth.
The dose-response relationship between physical activity (PA) and cardiovascular health in children and adolescents is unclear. Blood pressure (BP) is a practical and useful measure of cardiovascular health in youth. ⋯ A modest dose-response relation was observed between PA and mean systolic and diastolic BP values. PA did, however, have a strong gradient effect on BP when predicting hypertensive values. These results support the public health recommendation that children and youth accumulate at least 60 min of moderate-to-vigorous PA daily.
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To determine the rate of eye injury sustained in 12 college sports in order to assess whether there is a high risk of ocular eye injury in some sports. ⋯ The rate of ocular injury as a result of participation in baseball, basketball, cross-country, football, golf, soccer, swimming and diving, track and field, water polo, softball, or volleyball is very low. Hence, any discussion with athletes regarding the utility of eye protection while participating in any of these sports should focus on the athlete's past ocular history instead of the sport to be played.
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Med Sci Sports Exerc · Feb 2008
Sensory and electromyographic mapping during delayed-onset muscle soreness.
The aim of this human study was to apply novel topographical mapping techniques to investigate sensory and EMG manifestations of delayed-onset muscle soreness (DOMS) in multiple locations of the quadriceps. ⋯ Novel topographical mapping of both surface EMG and PPT of the quadriceps showed site-dependent effects of eccentric exercise, probably attributable to variations in the morphological and architectural characteristics of the muscle fibers. Greater manifestations of DOMS in the distal region of the quadriceps may indicate a greater susceptibility of this region to further injury after eccentric exercise.