This section is devoted to those activities that are mostly devoted to actual building of muscle and require more strength than the ones previously listed. It's fool-hearty to believe that none of these activities cross over, because they all do to some extent. However, there are some activities, such as rock climbing that, while the heights and danger might stimulate the heart more than actual repetitive muscle exhaustion, it's a much more strength-based activity.
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Rock climbing works just about every muscle in the upper body (pectorals, deltoids, forearms, biceps, triceps, rectus abdominus, serratus, intercostals, latissimus dorsi, spinal erectors and teres major) as well as a few in the lower body (hip flexors, trocanter, quadriceps, hamstrings, and calves). It is probably the single most demanding total body engagement one can find in any strength-based activity.
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