Under the careful supervision of a trained fitness professional, the benefits of prepubescent strength training (improved strength, power, muscular endurance, bone density) outweigh the risks (acute and chronic musculoskeletal injuries). (CB)

A study of effects of squatting exercise on heart rate and blood lactate levels in trained and untrained males indicated that trained subjects performed more work and had higher heart rates and lactate levels at exhaustion untrained subjects, though heart rate and lactate levels were lower for trained subjects at a given bar mass or submaximal…

A study of 11 obese adults who exercised with hand weights concludes that using the weights increases the energy demands of walking but only slightly. Research and results are presented and analyzed. (JL)

The effects of stretching techniques on arterial blood pressure (ABP) were studied in three groups of 20 men each. Each group performed one of three proprioceptive neuromuscular facilitation (PNF) techniques. Results are presented. The study indicates that the benefits of stretching may outweigh the risk of elevated ABP. (JL)

Highly skilled ropejumpers can maintain their exercise intensity by varying their jumping technique. Research on heart rate responses and aerobic requirements of different jumping techniques is discussed. Methodology and data are reported. (Author/JL)

The validity generalization model of meta analysis is described and modified for application to concurrent validity studies of motor behavior. An example is presented. (Author/MT)

Six researchers discuss the advantages of walking as a lifelong exercise and weigh it against others types of exercise. (MT)

Argues that depression may be viewed as one of several normal affective developments of pregnancy rooted in some of the physiological events of gestation and that identification of depression during pregnancy may be difficult (but nonetheless important) because the symptoms of pregnancy and depression are confounded. (Author/ABB)

Describes the hardware, priced at under $600 in 1984, required to adapt an Apple IIe microcomputer for use as a physiograph. Gavlanic skin response (GSR), electromyograph (EMG), skin temperature, and heart rate data can be recorded at user-specified intervals, displayed on a monitor, saved to a disk, and printed on paper. (Author/JDH)

A computer-controlled experimental psychology investigation suitable for use in an undergraduate laboratory is described. The investigation examines the relationship between aesthetic preference and speed of reaction in making choices between colors generated on a video monitor. (Author)

The pattern of fatigue resulting from systematically varying the intercontraction rest interval was examined in male and female subjects employing a hand-grip fatigue exercise. Results and conclusions are presented. (Author/MT)

Groups of 100 mentally retarded adolescents, exhibiting both self-injurious behavior (SIB) and stereotypy, stereotypy alone, SIB alone, or neither of these types of behavior were rated in terms of response to sedative-hypnotic medication. Results suggested that the paradoxical response to sedative-hypnotics may be a form of withdrawal. (Author/CL)

Five hyperactive primary and intermediate students were taught biofeedback techniques designed to elevate finger temperature. Ss learned to raise their temperature and were observed to decrease hyperactive type behaviors while increasing attention to academic tasks. (CL)

A discussion of nutrition's role in athletics is presented in this article. The effects of good day-to-day nutrition, the pregame meal, fluid intake, and dietary supplements on the athletes endurance and performance are discussed. (DF)

Presented are abstracts of papers arranged in alphabetical order by first-named author. The proceedings of the American Physiological Society were held jointly with the American Society of Zoologists (ASZ) and the Biomedical Engineering Society (BMES). (EB)