Einstein said measurements of this depend on whether the observer is moving; it's not absolute
A runner's fatigue caused by glycogen depletion is called "hitting" this
Term for weights, like barbells & dumbbells, not attached to a machine
These machines mimic the action of running up stadium bleachers, with much more convenience
Crunches are performed to strengthen these midsection muslces
Judi Sheppard Missett developed & popularized this combination of aerobics & jazz dance
This imaginary line separates the north Pacific from the south pacific
This continent occupies about 30% of the Earth's total land area
This country's Queen Charlotte Islands lie south of the USA's Prince of Wales Island
Cape York Peninsula stretches northward from this continent's mainland