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Mark purchases a spear to work on his throwing technique.
Any training you do should motivate you to succeed.
Training continues, and it's almost time to start buying race gear.
It works in some cases, and doesn't do a darn thing in others.
New study suggests it can prevent arthritis.
This Colorado dude certainly thinks so.
From better sex to injury prevention.
Our expert explains the effect that each has on your knees.