For ideal anaerobic training in nature the best venues are those where all out sprinting, without impact on joints, is possible.
Some excellent natural anaerobic venues are high and steep sand dunes, with slopes long enough for 30 to 60 second sprints uphill.
When sand dunes for anaerobic training are not readily available, sprints can be done up steep hills, up stadium stairs, or those leading from beaches.
Young knee joints can do sprints on flat surfaces without much concern for damage, even though the impact can be as high as 10 times body weight. However, as joints age they should be treated with care. Always minimizing impact by sprinting up slopes and on soft surfaces.
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