Comparison of Physical Activity, TV/Video Watching/Gaming, and Usage of a Portable Electronic Devices by Children With and Without Autism Spectrum Disorder.

OBJECTIVE: Individuals with autism spectrum disorder (ASD) participate in less physical activity (PA) and more sedentary behavior than their peers without ASD. METHODS: The study employed Chi-square analyses of the NSCH 2016-2017 data to compare PA, TV/video watching/gaming, and usage of portable electronic devices by children with and without ASD by age and ASD severity. RESULTS: Results suggest more than two and a half times as many children 6-11 and 12-17 years old with ASD failed to engage in 60 min of PA during the past week compared to peers without ASD. As children aged, their PA time decreased, with a larger percentage drop for children with ASD. For children ages 6-11 years, an inverse relationship was found between PA and ASD severity that was not found for older children. As the children got older, children with ASD spent more time watching TV/video watching/gaming than peers without ASD, with differing results by ASD severity. More children Birth to 5 years ASD used portable electronic devices than their peers without ASD and more young children with ASD used devices for 3 or more hours a day. Roughly the same proportions of children 12-17 years old used devices for more than 3 h a day but differential results were found between children with and without ASD for less than 1 h of device use. CONCLUSIONS FOR PRACTICE: These data can be used to advocate for individualized PA interventions and services to increase PA and decrease sedentary behaviors of children with ASD.

Specificity of machine, barbell, and water-filled log bench press resistance training on measures of strength.

The purpose of this study was to compare the effects of 10 weeks of resistance training with an isotonic bench press machine and 2 types of free-weight bench press exercises on several measures bench press strength. Specificity was investigated by comparing the ability to transfer strength gained from a type of training that differed from the mode of testing. Forty-nine men participated in the study. The subjects completed a pretest on the machine (MB), barbell (BB), isokinetic (IB), and log (LB) bench press to determine baseline strength and completed 10 weeks of training on the MB, BB, or LB. The 3 groups were tested to see whether differential training effects occurred from pre- to posttest scores on the BB, MB, LB, and peak force on the IB. By multivariate analysis, the trial-by-group interaction was not statistically significant. The multivariate and subsequent univariate analyses of variance tests indicated statistically significant effects from pre- to posttest for peak force on the IB test and the BB, MB, and LB. Correlations among the strength tests were high (0.92 > or = r < or = 0.97) and moderate between the strength tests and IB peak force (0.62 > or = r < pr = 0.83). Mean 3 repetition maximum MB strength was 8% higher than BB strength, which was 3% higher than LB strength, indicating differences in the amount of stabilization required to control the resistance. The findings of this study showed that all 3 training groups significantly improved in strength during short-term training on the MB, BB, and LB. These data lend evidence that improved strength after training on the MB, BB, and LB equally transfers to strength gains on any of the 4 modes of testing. These results should be considered when including similar exercises varying in stability into the training program to improve strength.