Effects of extremity loading upon energy expenditure and running mechanics.

Physiological and mechanical consequences of running with commercially available hand and/or ankle weights were examined. Five males and three females (age 30 to 56 yr) ran for 30 min on a treadmill (0% grade) at a self-selected pace (8.9 to 13.

Fifteen-year interval spirometric evaluation of the Oregon predictive equations.

The 1969 Oregon spirometric predictive equations were evaluated by retesting 199 of the 988 original sample population after 15 years. The 1969 data were used to test for sample bias between the retested and not-retested groups. There was no significant difference in mean values for age, height, or test results except for a five-year age difference in men.

The Ability of Instructors to Organize Aerobic Dance Exercise Into Effective Cardiovascular Training.

In brief: The ability of five aerobics instructors to combine music and exercise movements into effective cardiovascular training was evaluated at Oregon State University in Corvallis. Respiratory gas exchange and heart rate determinations were made during dance exercise sequences that were estimated to represent low, medium, and high levels of exercise intensity. Besides the instructors, twelve subjects (ten women and two men) participated in the study.

A model treadmill adaptation for wheelchair ergometry.

We have designed, constructed and tested a restraining apparatus to permit safe uninhibited hand propulsion of a wheelchair on a motor driven treadmill. The special design features of the tracking assembly minimize any potential hazard or apprehension associated with possible lateral or rearward displacement of a chair from the belt surface. Special linear bearings minimize any increase in rolling resistance (less than 1.

Limitations to exercise capacity and endurance: pulmonary system.

The response of the pulmonary system to exercise is well-documented to be quite precise in its homeostatic regulation, highly efficient in terms of its physiologic cost, and operating well within its maximum reserves. Two exceptions to these generalizations are documented here in the highly-trained athlete: 1) the arterial hypoxemia observed in short-term work at a VO2 greater than 4-5 l . min-1, and 2) the tachypneic hyperventilation of long-term, heavy exercise in varying environmental conditions.