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Nitrates may increase stamina by 16 percent.
Mark is up for pullups but down on sprints.
Mark purchases a spear to work on his throwing technique.
Any training you do should motivate you to succeed.
Allergy season wreaks havoc with Mark's training
Training continues, and it's almost time to start buying race gear.
New study suggests it can prevent arthritis.
This Colorado dude certainly thinks so.