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4.3 WORKOUT DESCRIPTIONS
SPEED INTERVAL
This program alternates intervals of high and low speeds. As the profile diagram indicates, the speed gradually
increases in the early stage. The main section of the workout consists of high- and low-speed intervals. The contrast
between speeds is sharper than in the AEROBIC workout. In the final stage, the speed gradually declines.
AEROBIC
This program alternates intervals of high and low speeds. As the profile diagram indicates, the speed gradually
increases in the early stage. The main section of the workout consists of high- and low-speed intervals. The contrast
between speeds is more subtle than in the SPEED INTERVALworkout. In the final stage, the speed gradually
declines.
WEIGHT LOSS
This program alternates intervals of high and low elevations. Unlike the HILL CLIMB workout, the high intervals are
uniform in elevation, as are the low intervals.